PLM+ SERIES

PLM+ SERIES
Powered Loudspeaker Management™ System
PLM 20K44
PLM 12K44
Incorporating technologies from
Operation Manual
1. Important safety instructions
1. Important safety instructions
Before using the device, be sure to carefully read the Safety Instructions. Keep this document with the device at
all times.
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Read these instructions.
Keep these instructions
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.
Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding-type plug has two
blades and a third grounding prong. The wide blade or
the third prong is provided for your safety. If the provided
plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched,
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
Only use attachments/accessories specified by the
manufacturer.
Use only with a cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
Unplug this apparatus during lightning storms or when
unused for long periods of time.
Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid
has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
Use the mains plug to disconnect the appartus from the
mains.
WARNING: To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.
Do not expose this equipment to dripping or splashing and
ensure that no objects filled with liquids, such as vases, are
placed on the equipment.
The mains plug of the power supply cord shall remain readily
operable.
Do not connect the unit’s output to any other voltage source
such as battery, mains source, or power supply, regardless
of whether the unit is turned on or off.
Do not remove the top (or bottom) cover. Removal of the
cover will expose hazardous voltages. There are no user
serviceable parts inside and removal may void the warranty.
An experienced user shall always supervise this professional
audio equipment, especially if inexperienced adults or
minors are using the equipment.
The US National Differences clause 16.3 requires that
network cables must be flame rated VW-1.
PLM+ SERIES Operation Manual rev 1.0.0
1.1. Approvals
This equipment conforms to the requirements
of the EMC Directive 2004/108/EC and the
requirements of the Low Voltage Directive
2006/95/EC.
Standards applied: EMC Emission
EN55103-1, E3
EMC Immunity EN55103-2, E3, with S/N
below 1% at normal operation level.
Electrical Safety EN60065, Class I
This equipment is tested and listed according to the
U.S. safety standard ANSI/ UL 60065 and
Canadian safety standard CSA C22.2
NO. 60065. Intertek made the tests and they
are a Nationally Recognized Testing Laboratory
(NRTL).
1.2. Warnings
1.2.1. Explanation of warning symbols
The lightning bolt triangle is used to
alert the user to the presence of
un-insulated “dangerous voltages”
within the unit’s chassis that may be
of sufficient magnitude to constitute a
risk of electric shock to humans.
The exclamation point triangle is used to
alert the user to presence of important
operating and service instructions in the
literature accompanying the product.
1.2.2. Warnings
To prevent electric shock do not remove top or bottom
covers. No user serviceable parts inside, refer servicing to
qualified service personnel.
Français: À prévenir le choc électrique n’enlevez pas les
couvercles. Il n’y a pas des parties serviceable à l’intérieur, tous
reparations doit etre faire par personnel qualifié seulment.
1. Important safety instructions
To completely disconnect this equipment from the AC
mains, disconnect the power supply cord plug from the AC
receptacle. The mains plug of the power supply cord shall
remain readily operable.
Français: Pour démonter complètement l’équipement de
l’alimentation générale, démonter le câble d’alimentation
de son réceptacle. La prise d’alimentation restera aisément
fonctionnelle.
To reduce risk of fire or electric shock, do not expose this
apparatus to rain or moisture.
Français: Pour réduire les risques d’incendie ou de choc
électrique, n’exposez pas l’appareil à la pluie ou à l’humidité.
Do not expose this system/apparatus to dripping or splashing
and ensure that no objects filled with liquids, such as vases,
are placed on the apparatus.
Français: N’exposez pas ce système/appareil au
ruissellement ni aux éclaboussures et assurez-vous qu’aucun
objet contenant du liquide tel qu’un vase n’est placé sur
l’appareil.
This apparatus must be connected to a mains socket outlet
with a protective earthing connection.
Français: Cet appareil doit être raccordé à une prise secteur
avec terre de protection.
The mains plug is used as a disconnect device and shall
remain readily operable.
Français: Lorsque la prise du réseau d’alimentation est utilisés
comme dispositif de déconnexion, ce dispositif doit
demeuré aisément accessible.
1.2.3. Caution
To reduce the risk of fi re or electric shock, do not remove screws.
No user-serviceable parts inside. Refer servicing to qualified
service personnel.
Français: Pour réduire le risque d’incendie ou de choc
électrique, ne pas retirer les vis. Aucune pièce réparable par
l’utilisateur. Confier l’entretien àpersonnel qualifié.
1.2.4. User responsibility
Mains connection grounding
Radio interference
A sample of this product has been tested and complies with
the limits for the European Electro Magnetic Compatibility
(EMC) directive. This equipment has also been tested and
found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful
interference from electrical equipment. This product uses
radio frequency energy and if not used or installed in
accordance with these operating instructions, may cause
interference to other equipment, such as radio receivers.
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003
du Canada.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which
can be determined by turning the equipment on and off, the
user is encouraged to try to correct the interference by one or
more of the following measures:
•
•
•
•
•
Reorient or relocate the antenna.
Increase the separation between the equipment and
receiver.
Connect the equipment to an outlet on a circuit different
from that to which the receiver is connected.
Check if the affected unit complies with the EMC limits for
immunity, (CE-labeled). If not, address the problem with
the manufacturer or supplier. All electrical products sold
in the EC must be approved for immunity against
electromagnetic fields, high voltage flashes, and radio
interference.
Consult the dealer or an experienced radio/TV technician
for help.
Speaker damage
Amplifier apparatus is very powerful and can be potentially
dangerous to both loudspeakers and humans alike. Many
loudspeakers can be easily damaged or destroyed by
overpowering them. Always check the speaker’s continuous
and peak power capabilities. Although the amplifiers
attenuators can be used to reduce the overall gain, an
increase of the input signal can result in full output power,
which may cause damage to connected speakers.
Your amplifier must be connected to a grounded socket outlet.
Maintenance
Speaker output hazard on amplifiers
For safe and reliable operation, the dust fi lters on both sides
of the front panel, behind the grilles, should be removed and
cleaned regularly to ensure maximum airflow through the
device.
Amplifiers are capable of producing hazardous output
voltages. To avoid electrical shock, do not touch any exposed
speaker wiring while the amplifier is operating. The external
wiring connected to the speaker terminals shall be installed
by a qualified person, or ready-made leads or cords of
appropriate capacity shall be used.
As the power output channels on amplifiers produce high
voltage, do not connect or disconnect speaker cables when
the mains power is on.
If the dust filters are not maintained there will be safety
risks; for example, high internal temperatures could ignite
the dust and start a fire. There is also a risk that the unit will
malfunction since it is dependent on constant airflow from
front to rear. If the dust fi lters are not clean and the unit
malfunctions, any resulting problems will not be covered by
the warranty.
PLM+ SERIES Operation Manual rev 1.0.0
3
Table of Contents
Table of Contents
1. Important safety instructions
2
1.1. Approvals
2
1.2. Warnings
2
2. Introduction 6
2.1. Welcome 6
2.2. Main Features 6
2.3. Additional Documentation 8
3. Installation 8
3.1. Unpacking 8
3.2. Mounting 8
3.3. Cooling 10
3.4. Operating Voltage 10
3.5. Grounding 11
4. Product Overview 12
4.1. Front Panel Overview 12
4.2. Rear panel 14
5. Operation and performance 16
5.1. Operation precautions 16
5.2. Power Output Performance 16
5.3. Amplifier and Load Protection Systems 18
5.4. Power Supply 24
6. Signal Flow and Lake® Processing 6.1. Signal Flow 25
6.2. Level Adjustments & Mute Points 25
6.3. Lake Processing and Control 26
6.4. Modules and Frames 27
6.5. Loudspeaker Processor Overview 27
6.6. Files and Presets 28
7. Front Panel Interface 4
25
29
7.1. Overview 29
7.2. Front Panel Key Lock 30
7.3. Power Button 30
7.4. Mute Enable Button 31
PLM+ SERIES Operation Manual rev 1.0.0
Table of Contents
7.5. Meter Button 31
7.6. Menu Button 31
7.7. Exit Button 31
7.8. Dynamic Buttons, Controls and LEDs 32
7.9. Warning and Fault Indications 37
7.10. Meter Mode 39
7.11. Menu Mode 43
8. Back Panel Interface 57
8.1. Speaker Outputs
57
8.2. Analog Inputs 60
8.3. AES3 Digital I/O 62
8.4. RJ45 etherCON Network Connections 62
8.5. Power Inlet 64
9. Appendix 65
9.1. Faults and Warnings Overview 65
9.2. Maintenance 68
9.3. Factory Default Settings 68
9.4. Current Draw and Thermal Dissipation Specifications 70
9.5. Glossary of Terms, Acronyms and Abbreviations 72
10. Application Guide 74
10.1. Rack I/O Panels 74
10.2. Power Distribution 74
10.3. Gain Structure 75
10.4. Gain / Level Optimization 77
10.5. Speaker Configurations 80
10.6. Digital Audio Connections 80
10.7. Digital Clock Configuration 83
11. Technical Specifications 85
12. Warranty and Support 87
12.1. General 87
12.2. International Warranties 87
12.3. Technical Assistance and Service 87
PLM+ SERIES Operation Manual rev 1.0.0
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2. Introduction
2. Introduction
2.1. Welcome
Thank you for choosing the Lab.gruppen PLM+ Series of Powered Loudspeaker Management systems for your
sound reinforcement needs. We are confident that you will be pleased with the performance, unique features,
configuration flexibility, reliability, and long-term durability offered by this product.
For fast installation and use of this product, your welcome package includes a printed copy of the PLM+ Series
Quick Start Guide which contains the information required to safely install the product and place it in service.
Control and editing features are accessible via the front panel interface or via the included Lake Controller software.
It is recommended that the Quick Start Guide and all product documentation on the included USB key is reviewed
to ensure familiarity with the various configuration and control options.
Thank you again for placing your confidence in Lab.gruppen products.
2.2. Main Features
The PLM+ Series incorporates a number of sophisticated technologies to ensure the best possible performance
and many years of reliable operation. The following section summarizes the benefits of each feature; additional
information is available in the reference manuals.
2.2.1. Amplifier Platform
The PLM+ Series power output section has expanded upon Lab.gruppen’s robust, road-proven
PLM 20000Q amplifier. Features common to both platforms include extraordinary power density; 4 channels of
patented Class TD® output stages, a Power Factor Corrected (PFC), Regulated Switch Mode Power Supply
(R.SMPS™), the high-efficiency Intercooler® copper-finned cooling system, and a full suite of protection features,
including the Breaker Emulation Limiter (BEL). Signal inputs are analog, AES digital, and Dante digital audio
network.
2.2.2. Amplifier DSP (Digital Signal Processor)
Various features of PLM+ Series devices are controlled by the on-board DSP, some of which are summarized in
this section.
2.2.2.1. Input Gain (Sensitivity)
Input gain (sensitivity) is set in the digital domain for PLM+ Series devices, and may be controlled via the Lake
Controller software or front-panel interface.
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PLM+ SERIES Operation Manual rev 1.0.0
2. Introduction
2.2.2.2. ISVPL™
The Inter-Sample Voltage Peak Limiter (ISVPL) tailors each power output to the characteristics of the connected
load. Please refer to section 5.3.1 for further information.
2.2.2.3. Load Verification & Performance Monitoring
A comprehensive set of proprietary DSP-based tools are provided for load verification and real-time performance
monitoring. These functions utilize LoadLibrary, a comprehensive database for each loudspeaker component of the
connected load (usually one or more band-limited drivers in a multi-way system).
Using this data and a brief test signal, LoadSmart compares actual response to predicted response, identifying
any malfunctioning components or connection errors. During the performance, PLM+ monitors real-time voltage,
current draw, and temperatures of the PLM+ amplifier stages as well as the power supply. This allows operators to
avoid power compression and identify potential problems.
Please refer to the Lake Controller Operation Manual for detailed information on PLM+ Series load verification
and real-time performance monitoring functionality.
2.2.3. Lake Processing and Controller
PLM+ Series devices integrate seamlessly into the Lake Processing environment and are accessible via the Lake
Controller software. Processing modules offer precise settings for gain, delay, crossover settings, equalization and
limiting. Lake processing features incorporated in each module include Raised Cosine Equalization™, linear phase
crossovers, and LimiterMax™ loudspeaker protection. Please refer to the Lake Controller Operation Manual for
further information.
2.2.4. Analyzer Plug-in
Lake Controller software provides integration with third-party real-time analyzers, providing simultaneous
measurement display and EQ adjustment via the Lake Controller. Approved analyzers include Rational Acoustics
Smaart 7, SysTune from AMFG, and WaveCapture Live-Capture Light or Live-Capture Pro; additional third-party
analyzers may be approved in the future.
Please refer to the Lake Controller Operation Manual for further information regarding the Analyzer plug-in and
associated functionality.
2.2.5. Dante™ Audio Network
PLM+ Series devices include Dante digital audio networking as standard. Utilizing the latest advances in Ethernet
technology, Dante offers simplified system configuration and extremely low latency while delivering very high quality
uncompressed digital audio across the Lake network. The Zen™ automatic configuration feature enables plugand-play setup without third-party DHCP or DNS servers. Dante is compatible with high-bandwidth networks,
allowing large numbers of audio channels to be distributed alongside control and analyzer data.
PLM+ SERIES Operation Manual rev 1.0.0
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3. Installation
2.3. Additional Documentation
This document, the PLM+ Operation Manual, serves as the primary reference source for detailed information
on the installation and operation of PLM+ Series Powered Loudspeaker Management systems. It also provides
detailed information on set-up and configuration using the front-panel interface.
If you intend to use the device as part of a networked system, or access features via the Lake Controller, please
refer to the various supporting documents which can be located via these methods:
• Start > Programs > Lake Controller > Documentation (after installing Lake Controller software)
• On the included installer USB key, or via the downloaded software installer
• Online at: http://labgruppen.com/products/documentation/
3. Installation
3.1. Unpacking
Carefully open the shipping carton and check for any damage to the device or the supplied accessories. Every
Lab.gruppen product is tested and inspected before leaving the factory and should arrive in perfect condition. If
any damage is discovered, please notify the shipping company immediately. Only the consignee may initiate a
claim with the carrier or their insurers for damage incurred during shipping. Save the carton and packing materials
for the carrier’s inspection.
In addition to the PLM+ Series device, the shipping carton includes the following items:
• PLM+ Series Quick Start & Field Reference Guide
• AC mains lead (power cable) with Neutrik® powerCON® connector
• Rear brackets for additional rack support (pair) along with associated mounting hardware
• Software Installer and Documentation USB key
Please keep the original carton and associated packaging to facilitate shipping of the device should the need arise.
3.2. Mounting
Airflow for cooling the device is from front panel (intake) to rear panel (exit). Please ensure that no objects, such as
rack doors or lids, are placed at the front or rear of the rack to ensure that airflow is maximized. This device has no
top or bottom vents and therefore PLM+ units may be stacked directly on top of each other.
Sufficient space should be available at the front of the rack to accommodate the handles, and at the rear to
accommodate connectors and cables; allowance must be made for cable or loom bends within a rack.
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PLM+ SERIES Operation Manual rev 1.0.0
3. Installation
3.2.1. Rear Mounting
Two rear support brackets along with associated mounting hardware are included with the PLM+, as shown in
Figure 3.1; it is recommended that these are used wherever possible. Fit the brackets to the vertical rails at the rear
of the rack. Figure 3.2 and Figure 3.3 show the fitting options for fixed and removable installation.
The support brackets are reversible and may be fitted to point either to the front or rear of the rack; the orientation
used depends on the rack depth and position of the rear rack rails.
Two mounting methods are possible; note that the method shown in Figure 3.2 additionally provides extra security
against unauthorized removal. For situations where rapid removal and replacement is required, the method shown
in Figure 3.3 should be used.
Fig 3.1: Rear support bracket with mounting hardware
Fig 3.2: Rear support bracket mounted for
fixed installation and bracket pointing forward
Fig 3.3: Rear support bracket mounted for
removable installation and bracket pointing back
PLM+ SERIES Operation Manual rev 1.0.0
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3. Installation
3.3. Cooling
3.3.1. Overview
The PLM+ Series devices use a forced-air cooling system with airflow from front to rear, allowing high continuous
power levels without thermal problems. Front-to-rear airflow is preferable as air at the front of a rack is cooler than
that at the rear in nearly all situations; never attempt to reverse the airflow. The operation of the PLM+’s cooling
system is dependent on front-to-rear airflow; it will not function effectively with external airflow in the opposite
direction.
Make sure an adequate air supply is provided in front of the PLM+, and that the rear of the PLM+ has sufficient
space to allow air to escape. If the PLM+ is rack-mounted, never operate the unit with any front or rear rack doors
or covers in position. It is recommended to keep the ambient temperature around the PLM+ as cool as possible.
An increased temperature can have a significant negative impact on the expected lifetime on the components
inside the PLM+.
Note: Fit solid blanks (not ventilation blanks) to unused rack spaces to ensure effective air circulation.
Leaving gaps in between items of equipment degrades the effectiveness of forced-air cooling.
If installing one or more PLM+ Series devices in a rack with other fan-cooled equipment, be sure that all the
other equipment also uses front-to-rear airflow for cooling. If this precaution is not observed, there is a risk of
overheating, as units with the reverse airflow will be drawing in air which has already been heated by the PLM+s.
3.3.2. Temperature Sensing and Protection
The PLM+ is equipped with a sophisticated temperature sensing system which protects it from any overheating
which may occur as a result of inadequate ventilation.
Note: Always ensure the dust filters behind the detachable front panel are clean to ensure maximum
possible airflow.
3.4. Operating Voltage
The label adjacent to the mains (AC) input connector indicates the AC mains voltage for which the device is wired
and approved. Both PLM+ models incorporate a universal power supply operating from 80 to 265 V. Only connect
the mains cable (AC cord) to an AC source of the voltage shown on the label.
The PLM+ uses primary switching, which means the mains power is rectified on the primary side of the
transformer. This makes the power supply insensitive to mains frequency variation, and it will operate normally on
line frequencies from 45 to 75 Hz.
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PLM+ SERIES Operation Manual rev 1.0.0
3. Installation
If the mains plug (AC plug) fitted to the mains cable (AC cord) is not appropriate for your country, it can be removed
and a locally-sourced one fitted instead, observing the color coding in the table below:
powerCON pin
L
Brown
N
Blue
Green/Yellow
Table 3.1: AC Plug Configuration
If you are not 100% confident of your competence to replace the mains plug (AC plug), the task should be carried
out by qualified personnel.
Once a suitable AC power supply is connected, the device can be turned on using the front panel power button.
When the device is turned on, the power button LED changes from red (Standby) to green (Active).
Note: In-rush current is controlled and limited during the soft-start sequence. This enables multiple
PLM+ units on the same AC mains circuit to be turned on simultaneously
3.5. Grounding
Analog inputs feature Iso-Float™ ground isolation, a technology which combines the benefits of transformer
coupled isolation with the advantages of clean, direct-coupled inputs.
The audio converters are galvanically isolated, and not connected to mains ground. High-speed transformers and
opto-isolators create a barrier between the device and the outside electrical environment.
Note: The Iso-Float feature is activated by default, but may be disabled via the Lake Controller software,
or via the front panel menu.
Use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to section
8.2.4 for further information.
NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).
PLM+ SERIES Operation Manual rev 1.0.0
11
4. Product Overview
4. Product Overview
4.1. Front Panel Overview
The front panel presents the following amplifier status indicators:
1
2
4
10
2
1
3
5
11
6
7
8
9
12
The front panel controls are clustered around a daylight readable LCD 3 , allowing adjustment and monitoring of
the majority parameters and meters. The two clusters of controls on either side of the LCD include five dedicated
function buttons 4 5 6 7 12 , eight dynamic function buttons with embedded LEDs 8 9 and a rotary data
encoder 11 .
1 Handles – Two sturdy cast aluminium handles are integrated into the front panel. The handles should be used
when carrying the device, and when fitting into or removing from a rack. Ensure that any door or removable rack
front cover has sufficient depth to clear the handles.
2 Dust Filters – Two dust filters are fitted behind metal covers. To remove the covers, loosen the thumbscrews
located behind the handles. Once detached, the dust filter elements can be removed for cleaning; please refer to
section 9.2 for further information.
Note: NEVER operate this device without the dust filters in place.
3 Display – The display illuminates when the device is on. The LCD, function buttons, and the rotary encoder
provide real-time control and monitoring of most parameters. The LEDs embedded in the function buttons indicate
available menu options, provide confirmation of Controller communication, and indicate various faults and
warnings.
The brightness and contrast of the display and front panel LEDs can be adjusted via the front panel menu. A
screensaver will turn off the display when the unit is left without any action or signal present. It will light up again
at the push of any button or when signal reaches above 20 dB on any input. Please refer to section 7 for further
details.
Standby – PLM+ Series devices are powered on and to standby using the top-left button, or via the
Lake Controller.
4
12
PLM+ SERIES Operation Manual rev 1.0.0
4. Product Overview
Mute Enable – Select MUTE ENABLE to allow the dynamic function buttons to operate as mute controls for
the Module inputs and power output channels. The MUTE ENABLE button flashes when the mode is selected;
a subsequent press deselects this mode. If left activated, MUTE ENABLE mode will automatically disable two
minutes after the last mute action.
5
6 Meter – The METER button scrolls through various meter views including the default Home View, Amplifier
Meters View, Temperature Meters View, Input Meters View and Module Meters View. Pressing METER from Menu
Mode returns the screen to Meter Mode with the Home View displayed. Please refer to section 7.5 for further
details.
Menu – After pressing the MENU button, the LCD will display the top level menu. In Menu Mode the dynamic
function buttons enable access to various information and functionality. Please refer to section 7.6 for further details.
7
8 Dynamic Function Buttons with LEDs (Left of LCD) – The function of these buttons change according to
the currently selected view or menu.
• In Menu Mode they are used for menu navigation and for parameter selection
• In Meter Mode they provide Module input mute/unmute functionality in conjunction MUTE ENABLE
The left buttons provide Module input mute functionality, mute indication and faults and warning indications relating
to the individual PLM+ inputs. All four LEDs will iluminate simultaneously when indicating global faults or warnings.
Please refer to section 7 for further details.
Dynamic Function Buttons with LEDs (Right of LCD) – The function of these buttons change according to
the currently selected view or menu.
9
• In Menu Mode they are used for menu navigation and for parameter selection
• In Meter Mode they provide PLM+ output mute/unmute functionality in conjunction MUTE ENABLE
All LEDs provide individual mute, clip, fault and warning indications for the PLM+ power outputs channels. Please
refer to section 7 for further details.
Communication LED – The high-intensity white LED illuminates white to indicate that the Module/Frame is
selected in the Lake Controller; it flashes white to indicate communication with the Lake Controller.
10
The brightness of the LCD and communications LED can be adjusted in the Frame page of the Main Menu on the
front panel.
11 Rotary Encoder – The rotary encoder is used to modify various parameters (e.g. input level) via the menu.
When a menu item is selected that permits adjustment of parameter values, the ring around the rotary encoder
illuminates. In Home View the encoder can be used to scroll through the Meter Views.
12 Exit – The EXIT button is used primarily while navigating the menu system in Menu Mode; pressing EXIT will
return the menu up one level. In Meter Mode, pressing EXIT returns the metering display to the default Home View.
PLM+ SERIES Operation Manual rev 1.0.0
13
4. Product Overview
4.2. Rear panel
1
3
INPUT 1
SPEAKER OUTPUTS
INPUT 2
4
INPUT 3
INPUT 4
INPUT 1-2
5
INPUT 3-4
1Gbps PRIM
ACT
6
1Gbps SEC
LINK
LINK
PLM 12K44
100-240V
2400-2950W
50-60Hz
CH 3
BRIDGE
BRIDGE
CH 1
ACT
CH 2
CH 4
ANALOG WITH ISO-FLOAT
TM
PIN 1: SCRN 2: POS 3: NEG
AES/EBU
SWITCHED 100/1000 Base-TX
Made in Sweden
CLASS 3 WIRING
Ser. N:o
Must be grounded/earthed
Removed!
SPEAKER OUTPUTS
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 1-2
INPUT 3-4
1Gbps PRIM
ACT
LINK
1Gbps SEC
ACT
LINK
PLM 12K44
100-240V
2400-2950W
50-60Hz
2
ANALOG WITH ISO-FLOAT
CLASS 3
WIRING
1+/- CH 1+/2+/- CH 2+/1+:+
BRIDGE CH 1 & 2: 2- : -
1+/- CH 1+/2+/- CH 2+/-
3+/- CH 3+/4+/- CH 4+/-
1+/- CH 3+/2+/- CH 4+/BRIDGE CH 3 & 4: 1+ : +, 2- : -
TM
PIN 1: SCRN 2: POS 3: NEG
AES/EBU
SWITCHED 100/1000 Base-TX
Made in Sweden
Must be grounded/earthed
The PLM+ is available with a choice of connectors for power outputs: binding posts or Neutrik speakON®. Both
connection methods allow for Bridge Mode operation, which is activated from the Lake Controller software. Please
refer to the Lake Controller Operation Manual and section 8.1.1 of this Operation Manual for further information on
Bridge Mode.
Binding Posts – In this version, the power outputs for loudspeaker connection are available on four separate
pairs of fully enclosed binding posts. Bridge Mode can be enabled via the Lake Controller software; please refer to
the Lake Controller Operation Manual for further information.
1
speakON Connectors – The power outputs are simultaneously available on a single 8-pole speakON
connector, and on two 4-pole speakON connectors. The two 4-pole connectors carry the outputs of channels 1
& 2 and 3 & 4 respectively. Bridge Mode can be enabled via the Lake Controller software. Please refer to the Lake
Controller Operation Manual.
2
Analog Inputs – Analog inputs are available on four standard XLR3F latching connectors. The inputs are
electronically balanced and feature Lake Iso-Float circuitry. The impedance is 20 kohms, and the inputs can accept
a maximum input level of +26 dBu.
3
AES3 Inputs – Two latching XLR3F connectors are provided for AES3 digital audio signals (four audio
channels). Input impedance is 110 ohms, please ensure that 110 ohm digital audio cables are used; standard XLR
microphone cables are rarely suitable for reliable digital audio transmission.
4
Note: The PLM+ does not provide Analog or AES loop through / Link connectors. Where needed,
it is recomended to use Y-split cables or patchpanels wired to connect the Inputs with Link output
connectors. The AES3 termination load shall be enabled when the PLM+ is the last unit connected
within an AES3 daisy-chained system. The termination may be disabled, if desired, via the front panel
menu and within the Lake Controller software.
14
PLM+ SERIES Operation Manual rev 1.0.0
4. Product Overview
Primary Network Connector – The primary Neutrik RJ45 etherCON® connection provides integration into
an Ethernet control network which may include other Lake Processors and the Lake Controller software. Network
connection permits full control of all functions along with real-time metering from a remote position. This device
supports the Dante audio networking protocol, which allows transmission of multichannel, high-definition digital
audio over the same Ethernet connection.
5
Use the primary connector when using a star network topology, consisting of individual Cat-5e connections
between the devices and an Ethernet switch. Alternatively this connection can be used to daisy chain directly to
another Lake Processor. The daisy chain topology should not be used with Dante. For a technical reference to the
Ethernet Port, please refer to section 8.4. Additional information is also available in the Lake Network Configuration
Guide.
Note: The Ethernet ports operate at the Ethernet data rate of up to 1 Gbps and allow straight or
crossed network cables. LEDs above each port indicate network activity (ACT) and Gigabit network
connections (Gbps). If Gbps LED is unlit, speed is 100 Mbps.
Secondary Connector – The secondary network connector can be used to daisy-chain multiple LM,
PLM, PLM+ or D Series devices. Alternatively, a Dante dual-network topology can be created by connecting all
secondary network connectors to a separate Ethernet switch, ensuring full redundancy in the event of a network
component failure.
6
Note: Additional processor configuration is required for a dual redundant network setup. The device
may be configured for Dual Redundancy from the Network menu of the front panel or via Lake
Controller. See the Lake Controller Operation Manual for further details.
When the device operates in Dual Redundancy, a symbol (=) is displayed in the status bar. Dual
Redundancy is not enabled by default and must be configured.
For a technical reference of the Ethernet Port, please refer to section 8.4. Additional information is also available in
the Lake Network Configuration Guide.
Note: When connecting multiple devices to an Ethernet network, care must be taken NOT to create a
closed loop which causes network malfunction.
PLM+ SERIES Operation Manual rev 1.0.0
15
5. Operation and performance
5. Operation and performance
This chapter provides comprehensive information on PLM+ Series connection, setup, operation and performance.
The detailed information included here is essential to realizing the full functionality of the PLM+ Series devices.
5.1. Operation precautions
Make sure that the Standby button on the PLM+’s front panel is either unlit (OFF), or red (STANDBY), before
making any input or output connections.
Ensure the AC voltage is within the range printed on the label adjacent to the AC mains connector.
Ensure no input signal is present when powering on the PLM+ to reduce the risk of any inadvertent bursts of high
level audio.
5.2. Power Output Performance
The PLM+ uses Lab.gruppen’s patented Class TD technology (Tracking Class D) in the output stages, which
couples the efficiency of Class D topologies to the sonic purity of Class A/B designs.
The primary benefit is that Lab.gruppen’s Class TD works perfectly under all load conditions. The output maintains
its flat frequency response even into complex loads with very low nominal impedances. Reliability is very high,
and there is no interference with nearby RF equipment. Superior efficiency allows greater power density while
minimizing cooling requirements, yet sound quality matches that of the best Class A/B designs.
5.2.1. Symmetrical Power
The PLM+ models can deliver power as shown in Table 5.1 when all channels are driven equally.
2 ohms
2.67 ohms
(per channel)
(per channel)
(per channel)
8 ohms
16 ohms
PLM 12K44
3000 W
3000 W
3000 W
1900 W
950 W
PLM 20K44
4400 W
5000 W
4400 W
2300 W
1150 W
Load Impedance (ohms)
(per channel)
Table 5.1: Symmetrical Load Power Ratings
16
PLM+ SERIES Operation Manual rev 1.0.0
4 ohms
(per channel)
5. Operation and performance
5.2.2. Rational Power Management™
Rational Power Management™ (RPM) is a unique Lab.gruppen feature that allows for flexible allocation of power
across channels of a PLM+. Power that is not used by one output channel is free for use by another output
channel with greater demands. RPM allocates power up to the total limits of the specific amplifier model. RPM
exists in two modes. See the image below.
3000 W
SUB
LOW
MID
HIGH
PLM+ Series - Amp channels power adjusted to match the loudspeaker requirements
Figure 5.2: PLM 12K44 - Amp channels power adjusted to match the loudspeaker requirements
Auto RPM: The frame will automatically allocate power per output channel according to the ISVPL settings in the
speaker preset (per module output) in Lake Controller. If the ISVPL settings taken together allow total output higher
than the capabilities of the amplifier, RPM will reduce the ISVPL limiter thresholds evenly based on a proportional
reduction in dB. When RPM is active, an RPM icon will be displayed next to the “Actual ISVPL” values in the
Events & Control section. If actual ISVPL is above the normal platform maximum and equals speaker threshold, the
RPM indicator will be green. If actual ISVPL is above normal platform maximum but below speaker threshold, the
RPM indicator will be yellow.
Custom RPM: The CAFÉ software allows users to create an advanced custom power allocation scheme.
Switching to Custom mode disables the Automatic mode. When RPM is active an RPM icon will be displayed
next to the “Actual ISVPL” values in the Events & Control section. Please find more information about this in
documentation supplied with the CAFÉ software download.
RPM limitations: PLM 20K44 allows all four channels to deliver Channel Max output voltage of 194V.
PLM 12K44 allows two channels to deliver Channel Max output voltage of 194V.
PLM+ SERIES Operation Manual rev 1.0.0
17
5. Operation and performance
CAFÉ with ESP: CAFÉ (Configuring Amplifiers For the Environment) is a dedicated software application for
Windows and OSX that provides tools for system planning, specification and commissioning. CAFÉ incorporates
the Equipment Specification Predictor, a software module that examines SPL and speaker requirements for a
project and generates requirements for output power on an amplifier and system level. For more information on
CAFÉ and ESP, please consult the documentation supplied with the CAFÉ software download.
5.3. Amplifier and Load Protection Systems
The PLM+ is equipped with a comprehensive set of protection circuits. If operating conditions become sufficiently
extreme that any of these circuits become active, indication is provided by LEDs in one or more soft function
buttons 5-8, together with adjacent warning text. In addition to this, notification is also presented within the Lake
Controller software and within system log files.
5.3.1. Inter-Sample Voltage Peak Limiter (ISVPL)
The ISVPL is a high quality voltage limiter that can deliver seamless limitation to any desired level. Its ensures that
the voltage at the output terminals never exceeds the defined threshold.
It operates on these principles:
• The signal is delayed slightly to allow the ISVPL to look-ahead and reduce the gain before voltage in excess
of the threshold can appear at the output. This results in zero voltage overshoot at the output with a rounded
limitation up to the threshold.
• The amplitude of the output signal between digital samples is predicted which permits the ISVPL to respond to
analog peaks that may occur at the digital to analog converter.
• The release time of gain reduction is adaptive depending on the dynamics of the signal.
It is possible to select different ISVPL profiles for limiting optimization for a specific frequency band and personal
preference. The profiles are divided into two categories, with one category optimized for low distortion and the
other focusing on producing high sound pressure level (SPL). Within each category there are profiles optimized for
the different frequency bands.
5.3.1.1. Low Distortion Profiles
•
•
•
Universal – The universal profile is a soft limiter that can be used for all frequencies and is conservative in its
action upon VCL and CPL.
Sub/LF – The Sub/LF profile is tuned for frequency bands below 600 Hz. It has longer attack and release times
and is less conservative when it comes to acting upon VCL and CPL.
5.3.1.2. High SPL Profiles
High SPL profiles do not use the adaptive release time feature. High SPL profiles optimized for high frequencies
use less of the look-ahead delay peak-rounding feature; this feature is used most in the Sub profile and least the
HF profile.
• Sub - The Sub profile is optimized for frequencies between 20 - 200 Hz
• LF - The LF profile is optimized for frequencies between 20 - 1200 Hz
• MF - The MF profile is optimized for frequencies between 300 - 6000 Hz
• HF - The HF profile is optimized for frequencies above 1 kHz
18
PLM+ SERIES Operation Manual rev 1.0.0
5. Operation and performance
Table 5.3 shows the theoretical maximum output power for a given load impedance and ISVPL setting.
Note: An ISVPL-to-load calculator that will assist in generating the appropriate ISVPL setting for a desired
power load is available at www.labgruppen.com/plm. The ratings shown in the table below are limited by the
CPL (Current Peak Limiter) functions, not by ISVPL settings, due to power output channel current capacity.
Max. Sinewave Burst Power (Watts)
LLoad Impedance (ohms)
2
2.67
4
8
16
LISVPL SETTING (V peak)
194
4489
5993
4705
2352
1176
193
4489
5993
4656
2328
1164
1024
181
4489
5993
4095
2048
167
4489
5223
3486
1743
872
153
4489
4384
2926
1463
732
458
121
3660
2742
1830
915
101
2550
1910
1275
638
319
83
1722
129 0
861
431
215
70
1225
918
613
306
153
56
784
587
392
19 6
98
47
552
414
276
138
69
38
361
270
181
90
45
17.8
79
59
40
20
10
Table 5.3: ISVPL-to-output examples
The ISVPL threshold may be set at any level between 17.8 V and 600 V via the PLM+’s menu system. For further
details, please refer to section 7.11.2.5 of this manual, and also to the PLM+ Series chapter in the Lake Controller
User Manual.
PLM+ devices that have a smaller peak output voltage can still set the ISVPL threshold up to 600 V. When a
threshold is set above the maximum capability of a power output channel, the maximum ISVPL for that product will
be automatically set. Therefore, the ISVPL threshold can be in at the Module for the speaker’s maximum capability,
and the Module file remains cross-compatible with all PLM and PLM+ Series devices.
5.3.2. Current Peak Limiter (CPL)
The output Current Peak Limiter (CPL) ensures that the power output section will not be damaged by forcing it to
deliver current levels at the outputs that exceed the maximum current ratings of the output transistors. The CPL
keeps the output transistors within their Safe Operating Area (SOA). The CPL is non-adjustable.
CPL activity is indicated on the power output channel LED (embedded in the associated output channel’s function
button to the right of the LCD). Activity on an affected channel results in a flashing red indication together with a
CURRENT CLIP warning message displayed on the screen adjacent to the LED. A warning is also displayed on
the controlling PC via the network.
PLM+ SERIES Operation Manual rev 1.0.0
19
5. Operation and performance
This condition indicates an attempt to draw excessive current at the output. The output is attenuated until the
output current falls below the maximum current rating. Limiting is performed by the ISVPL limiter in conjunction
with the selected ISVPL profile. Please refer to the Technical Specifications in Section 11 for further details
regarding ratings.
Note: If excessive current is indicated, check the output cables and examine the loudspeaker. If
impedance appears normal, you may rectify the condition by altering the ISVPL settings or lowering
input levels. CPL indication can be triggered by excessively low output impedance, possibly the result
of too many loudspeaker cabinets connected in parallel.
5.3.3. Power Average Limiter (PAL)
PAL activity is indicated by all four LED’s to the left adjacent to the display flashing red, together with a PAL ACTIVE
warning message displayed on the screen. A warning is also displayed on the Lake Controller software.
The Power Average Limiter Active warning (PAL Active) will be displayed when the power supply’s maximum rated
design parameters are reached. When this warning is displayed, gain limiting is being applied to the signal and the
ISVPL threshold is lowered accordingly.
5.3.4. Breaker Emulation Limiter (BEL™)
The PLM+ amplifiers are powerful devices that can draw a considerable amount of current from the mains supply.
The BEL models the temperature in the external breaker and limits the mains current to prevent it from tripping.
The BEL can be configured with both a breaker profile and a current value. The current value can be set from 5 to
32 Arms.
There are three different profiles available for selection:
•
•
•
Conservative - The conservative profile allows no momentary current above the configured threshold.
Fast - The fast profile models the time constant of the trip-curve corresponding to a fast breaker. It momentarily
allows current above the threshold to pass for a short time, leading to an increased modeled temperature. For
the limiter to disengage, the current must reduce below the threshold to enable the breaker to cool down.
Universal - The universal profile models the time constant of the trip-curve corresponding to a slow breaker.
It momentarily allows current above the threshold for a longer time, leading to an increased modeled
temperature. For the limiter to disengage the current has to reduce below the configured current for the breaker
to cool down.
The BEL can be configured via the PLM+ front panel and within the Lake Controller software.
20
PLM+ SERIES Operation Manual rev 1.0.0
5. Operation and performance
5.3.5. Under Voltage Limiter (UVL™)
PLM+ devices are equipped with an under voltage limiter. With mulitple powerful devices on a mains distribution
line, heavy current loads risk the reduction of voltage below that required for devices to function. The UVL
reduces the mains current draw when voltage drop below 80 V. The amount of reduction applied increases as
mains voltage drops towards 65 V, then at 65 V the power supply is shut down. The mains supply is continually
monitored and when sufficient voltage returns the power supply automatically restarts.
5.3.6. Current Average Limiter (CAL™)
The Current Average Limiter (CAL) monitors the RMS current drawn from each power output channel to ensure
that the power output stages are not overloaded. When activated, it regulates the current to a safe level to protect
the channel. The CAL should not be activated in normal usage, but if it is, its operation is indicated by an active
LED and the message CAL ACTIVE. Further indication is given within the Lake Controller software.
5.3.7. Voltage Clip Limiter (VCL)
If current draw from the PLM+’s power supply is too high, the PSU’s regulation capability may be exceeded and
the internal voltage rails may drop and cause clipping. If this occurs the VCL acts rapidly to prevent clipping on
the subsequent peaks. Limiting is performed by the ISVPL limiter in conjunction with the selected ISVPL profile.
Indication of this condition is shown on the output LEDs.
5.3.8. Temperature Protection
5.3.8.1. Overview
PLM+ Series devices are equipped with a sophisticated temperature sensing system that provides protection from
overheating which may occur as a result of inadequate ventilation or excessive power output.
Thermal measurements are made at several points within each power output channel along with measurements
in the power supply and DSP areas. If temperature in any area reaches a critical level then a warning is displayed
and gain reduction is applied. If the temperature continues to increase and reaches a dangerous level then a fault
is displayed and audio is muted. Each power output channel, the power supply and DSP area have separate
indications.
For all temperature faults, temperature monitoring will continue at 0.5 second intervals, with the output remaining
muted. When the area has cooled below the dangerous threshold, the fault condition is cleared and audio is
restored.
PLM+ SERIES Operation Manual rev 1.0.0
21
5. Operation and performance
5.3.8.2. Power Output Channels
A power output channel temperature warning or fault is indicated in one of the front panels LEDs (in the right-hand
soft function buttons).
• A warning is indicated by a static yellow LED and adjacent warning message: TEMP WARN:CH
• A fault is indicated with a static red LED and adjacent warning message: TEMP FLT:CH
An event report is sent to the Lake Controller software for both the warning and the fault. If a temperature fault
condition arises on a power channel, the output of that channel will be muted.
5.3.8.3. Power Supply / DSP
A power supply (PSU) or DSP temperature warning or fault is indicated by the LEDs in the four left function buttons
being lit at the same time.
• A warning is indicated by static yellow LEDs and adjacent warning message: TEMP WARN:PSU
(or TEMP WARN:DSP)
• A fault is indicated with static red LEDs and adjacent warning message: TEMP FLT:PSU (or TEMP FLT:DSP)
At temperatures above the critical warning level and below the dangerous fault level, the ISVPL threshold is slowly
reduced to decrease the output power and cool down the device. This enables the device to continue to pass
audio, although with a reduced amplitude, in extreme conditions. If reducing the ISVPL threshold does not cool
down the device a temp fault will still be issued when the dangerous temperature level is reached. An event report
will be sent to the Lake Controller software for both the warning and the fault.
5.3.9. DC Protection
DC protection is implemented on each power output to prevent damage to connected loudspeakers or any
PLM+ components. DC present at the output will cause the PLM+’s power output module breaker to blow. In this
instance a red LED will illuminate and NEEDS SERVICE will display on the LCD.
Note: The power output channel modules are independent of the input voltage. This is not a userservicable fault condition and the unit should be returned for repair.
5.3.10. VHF Protection
The PLM+ includes protection circuits that detect Very High Frequency (VHF) content in the input signal. The
detection is frequency-dependent, initiated from 10 kHz upwards. If continuous VHF signals are detected above
the threshold, the output will mute for approximately 6 seconds before a further measurement is taken. When
continuous VHF signal stops, the output unmutes and the amplifier returns to normal operation.
22
PLM+ SERIES Operation Manual rev 1.0.0
5. Operation and performance
This protection system recognizes only continuous VHF signals at high levels that will not appear in speech or
music. Any such content can therefore be considered as a fault condition. VHF protection is essential to avoid
damage to HF drivers.
VHF protection is dependent on a combination of output power level and frequency. Figure 5.4 shows a
decreasing power threshold, from approximately 10 kHz upwards, which illustrates increasing sensitivity of the
protection system with frequency. When continuous output power above the threshold line is detected, VHF
protection becomes active.
Trigger voltage
100
90
Voltage [Vrms]
80
70
60
50
40
30
20
10
0
0
5
10
15
20
25
30
Frequency [kHz]
Fig 5.4: VHF Protection Frequency Sensitivity
The attack time of the VHF protection circuitry also changes with frequency, becoming shorter at higher
frequencies. This is shown in Figure 5.5.
Full output voltage
1400
1200
Time [ms]
1000
800
600
400
20
200
0
0
5
10
15
20
25
30
Frequency [kHz]
Fig 5.5: VHF Protection Attack Time Variations
The VHF protection circuit is NOT a limiter and does not alter the PLM+’s frequency response. It is implemented
solely to detect continuous VHF content. HF content of normal music or speech signals at peak levels will be
passed in full.
Operation of the VHF protection circuits is indicated by one (or more) of the output channel LEDs (in the right-hand
soft function buttons) showing steady red. The adjacent fault message will show VHF FAULT. It is also reported as
a fault via the control network.
PLM+ SERIES Operation Manual rev 1.0.0
23
5. Operation and performance
5.3.11. Short Circuit Protection
A low impedance or short circuit at the power output terminals is detected when the output current is high (Current
Peak Limiter is active) and, simultaneously, the peak output voltage is below a predetermined threshold. When
this situation occurs, the output stage is muted to protect it from damage. Operation of the short circuit protection
system is indicated by an output channel LED (in the right-hand soft function buttons) showing steady red. The
adjacent fault message will show SHORT CIRCUIT. It is also reported as a fault via the control network to the Lake
Controller software. The presence of a short circuit (or low impedance) is re-tested every six seconds, and the
output remains muted until the fault clears.
5.4. Power Supply
The R.SMPS (Regulated Switch Mode Power Supply) is designed to keep supply voltage rails at optimum levels
even when the mains voltage drops. Mains voltages can drop as much as 20% below nominal before there is any
effect on rail voltages. Thus the R.SMPS can deliver full rail voltage to the output stage at all times, allowing the
PLM+ to exhibit consistent transient response and a clean LF response. PLM+ features a universal power supply
with power factor correction (PFC). The device can accept any mains voltage, from 65 V to 265 V, allowing it to
function worldwide in many different configurations. The PFC reduces current peaks on the lines and reduces the
requirements placed on the mains distribution system. PLM+ units offer an unparalleled power factor extremely
close to one.
5.4.1. Low Inrush Current
High power amplifiers with inadequate inrush current limiting can draw considerable current from the mains at turnon, sometimes tripping a fast-acting mains breaker. The PLM+, however, has very low inrush current to prevent
tripping of breakers.
Several PLM+s can, under normal conditions, be powered up simultaneously. If you do experience problems
powering up multiple PLM+s simultaneously, they must either be turned on manually in an ordered manner, or
sequenced remotely using the Lake Controller software’s Global Control feature. Alternatively, the capacity of the
mains supply should be increased.
Note: If insufficient power is available to allow simultaneous power-up, then there is probably insufficient
capacity for full power output during operation. It is recommended that additional capacity is added to
the mains power distribution system.
24
PLM+ SERIES Operation Manual rev 1.0.0
6. Signal Flow and Lake® Processing
6. Signal Flow and Lake® Processing
6.1. Signal Flow
The figures below depict the audio signal flow for a PLM+ Series device. It is worth noting that this sophisticated
device provides seven points in the signal chain where the signal level can be adjusted, muted or disconnected.
The blue sections represent Frame data, and the red sections represent Module data - please refer to the Lake
Controller Operation Manual for further information.
Important information regarding correct setting of the gain structure can be found in section 10.3.
Module Data stored in Module FIles (Speaker Presets)
Frame Data stored in System Files and Frame Presets
Input
Mixer A
Lake Contour
Module A
Input
Routers
1-4
Input
Mixer B
Lake Contour
Module B
WITH
INPUT
MUTES
Input
Mixer C
Lake Contour
Module C*
Input
Mixer D
Lake Contour
Module D*
INPUTS
AES 1-4
Analog 1-4
AES/Analog
pass through
to Dante
OUTPUTS
Dante 1-8
(no mutes)
1
2
Output Routing
Dante Receivers 1-8
3
Attenuator
Mute
Phase Rev
Custom RPM
ISVPL
Auto RPM
Amp Gain
LoadSmart
LoadPilot
AMP
Attenuator
Mute
Phase Rev
Custom RPM
ISVPL
Auto RPM
Amp Gain
LoadSmart
LoadPilot
AMP
Attenuator
Mute
Phase Rev
Custom RPM
ISVPL
Auto RPM
Amp Gain
LoadSmart
LoadPilot
AMP
Attenuator
Mute
Phase Rev
Custom RPM
ISVPL
Auto RPM
Amp Gain
LoadSmart
LoadPilot
AMP
4
5
Figure 6.1: PLM+ Signal Flow Diagram
6.2. Level Adjustments & Mute Points
1
2
3
4
5
6
7
Input Router Stage
Input Mixer Stage
Module Input Stage
Module Output Stage
Output Router Stage
Attenuation Stage
Amp Gain Stage
Input selection and MUTE
Router on /off connection to mixer and gain settings
Mute (N/A for LM Series Mesa Mode) and gain settings
Mute and gain settings
Output on /off routing connections
Power output channel mute and attenuation settings
Amplifier gain control
Note: If the required audio signal is not passing correctly, verify the connection, mute and gain settings
at all seven stages.
PLM+ SERIES Operation Manual rev 1.0.0
25
6. Signal Flow and Lake® Processing
6.2.1. Power Output Section: Limiting and Sensitivity
The Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensed
output current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures that
power output is maintained within the design limits of the PLM+.
The adjustable Inter-Sample Voltage Peak Limiter (ISVPL) sets the PLM+’s maximum output voltage and therefore
also the maximum output power. The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and can
also be set from the Lake Controller software.
The sophisticated output section monitors faults and generates warnings when appropriate; warnings are
displayed on the front panel of the PLM+ and also sent as messages over the control network. In the rare event
that maximum ratings are significantly exceeded, the PLM+ will mute until the condition has been rectified or
the incorrect setting has been readjusted. Sensing circuits also transmit local output power stage temperature,
processor card temperature, and PSU temperature to the appropriate protection circuits. Please refer to section
5.3 further details.
Table 6.2 lists PLM+ Series analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/
minimum ISVPL settings, assuming an analog input headroom of 26 dBu.
Input Sensitivity
194 V
LISVPL SETTING
17.8 V
LGAIN (dB)
+44
+1.0
0.87
-19.8
+41
+4.0
1.22
-16.8
0.08
0.11
+38
+7.0
1.73
-13.8
0.16
+35
+10.0
2.44
-10.8
0.22
+32
+13.0
3.45
-7.8
0.32
+29
+16.0
4.87
-4.8
0.45
+26
+19.0
6.88
-1.8
0.63
+22
+23.0
10.9 0
+2.2
1.00
Table 6.2: Analog Input Sensitivity in dBu and Vrms
6.3. Lake Processing and Control
As outlined in section 2.2.3, this device integrates seamlessly into the Lake Processing environment, providing all
features, functionality and connectivity associated with all Lake Processors. The internal Lake Processing includes
programmable crossovers, EQ, dynamics and other functions, and can be fully controlled via the Lake Controller
software with a version number of 6.3 or later. Additionally, many functions can be controlled or accessed directly
via the front panel.
The Lake Controller Operation Manual and Lake Network Configuration Guide are supplied on the accompanying
USB key and additional documentation is available from the Start Menu after software installation.
Visit http://labgruppen.com to download the latest software, firmware and documentation for your devices.
26
PLM+ SERIES Operation Manual rev 1.0.0
6. Signal Flow and Lake® Processing
Notes
6.4. Modules and Frames
6.4.1. Overview
A Frame represents one physical Lake Processor device (e.g. PLM 12K44). A maximum of four Modules are
contained within each Frame; these are referred to as Module A, B, C and D. The number of Modules shown in a
given Frame is dependent upon the signal processing configuration of that Frame.
Each Module can be configured as a Classic Crossover (Bessel, Butterworth, Linkwitz-Riley), as a Linear Phase
Crossover, or as multiple full bandwidth Auxiliary Outputs. The default configuration for the PLM+ is 4 x Contour
Classic 1 Way (CL1-Way) Output Modules, providing a total of twelve Module outputs that can be routed to any of
the four power outputs.
Please refer to the Lake Controller Operation Manual for further information.
6.4.2. LoadLibrary™ and Fingerprints
In addition to the standard loudspeaker presets (Module files), the Lake Controller also includes a set of enhanced
Module files specifically for use with the PLM and PLM+ Series.
These supplementary PLM+ Module files, known as the LoadLibrary, incorporate both Lake DSP parameters along
with PLM+ specific data; LoadLibrary Module files include parameter settings for the Amplifier Gain and ISVPL
limiter. Additionally, LoadLibrary loudspeaker types may also include data relating to the electrical characteristics of
a particular loudspeaker.
Electrical characteristic data is used to enable load verification (LoadSmart) to be performed on the PLM+.
This data set is termed a Fingerprint. When a PLM+-specific loudspeaker type is loaded, its Fingerprint load
characteristics are included. These load characteristics are stored in a file with a “.mdl” suffix and are loaded
simultaneously with the module file.
6.5. Loudspeaker Processor Overview
The Lake Processing system within PLM+ Series devices may be configured with up to four processing Modules
containing a total of up to twelve processing Module outputs, that can be routed to any of the four power output
channels.
Each set of processing elements is referred to as a Module and can be configured as crossovers, full bandwidth
auxiliary outputs, or a combination of the two. The relationship between inputs and outputs is defined via the Lake
Controller or via the front panel Input Config Menu.
The Lake Processing system provides two distinct categories of crossovers:
• Infinite Impulse Response filters (IIR) such as the classic Bessel, Butterworth or Linkwitz-Riley types; these are
available with slopes ranging from 6 dB/octave to 48 dB/octave.
• Finite Impulse Response filters (FIR) providing zero phase shift with steep transition slopes at the crossover
frequencies. These are also referred to as Linear Phase Crossovers.
PLM+ SERIES Operation Manual rev 1.0.0
27
6. Signal Flow and Lake® Processing
6.6. Files and Presets
The Lake system provides various methods for storing and recalling Module, Frame, or system-wide data. An
overview is provided below; for further information please refer to the Lake Controller Operation Manual.
6.6.1. Module, System and Sub-System Configuration Files
Module, System and Sub-System Configuration files are stored on the Lake Controller PC, and data is passed
across the network when recalling or storing these type of files.
•
•
A Module file is the smallest set of data that can be stored and recalled; it contains crossover, gain, delay, and
limiter information for an individual loudspeaker (see Figure 6.1).
A Module file may be recalled into other Lake devices. It is not possible to store a Module File directly on
the hardware device.
A System or Sub-System Configuration File contains a set of Module file information in addition to Frame
related information such Group data and I/O configuration (see Figure 6.1).
6.6.2. Frame and System Presets
The entire processor configuration can be stored as a Frame Preset on this hardware device. Presets can be
recalled via the front panel (refer to section 7.11.7) or via the Lake Controller software or Preset Manager utility;
presets can be stored using the Lake Controller software or Preset Manager utility.
A maximum of 100 Frame Presets can be stored on this device. The data within a Frame Preset includes the
configurations of all Modules in the Frame, including levels, crossover, EQ, input mixer, routing, and all other
parameters. As Frame Presets are stored in the hardware device, recall is available without using a PC.
Using the System Presets function in the Lake Controller, entire system configurations can be stored and recalled
across a network of LM, PLM and PLM+ Series devices. This enables fast retrieval and switching of entire system
configurations as minimal data is being sent between the Controller and Processors.
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7. Front Panel Interface
An overview of the front panel interface is provided in section 4.1. This chapter describes each cluster of controls
as shown in the diagram below.
1
2
4
10
2
1
3
5
11
6
7
8
9
12
7.1. Overview
The front panel interface is framed by two sturdy cast aluminium handles 1 and metal grill protecting the air intake
and dust filters 2 . The majority of PLM+ functions can be controlled and/or monitored via the frontpanel LCD
display screen 3 , power button 4 , function buttons 5 6 7 8 9 12 and rotary encoder 11 .
7.1.1. Operating Modes
The front panel has two basic modes: Meter Mode and Menu Mode.
• Meter Mode provides the following views: Home view, Amplifier Meters view / LoadPilot view, Temperature
Meters view, Input Meters view and Module Meters view. To navigate through these views, press the METER
button or turn the rotary encoder button. Please refer to section 7.10 for further information on Meter Mode.
• Menu Mode provides various menus for viewing and editing parameters and is selected by pressing the MENU
button. Select the required submenu by pressing the associated button.
7.1.2. Warning, Fault and Mute Indications
Fault or warning conditions are indicated via the LEDs embedded in the dynamic function buttons; a simultaneous
description is shown adjacent to the button, on the LCD. The LEDs to the left of the LCD indicate problems with
the PLM+ or its inputs, while those to the right indicate problems with the power output channels.
Please note that the same LEDs also indicate the mute status of inputs (left) and outputs (right). Further information
on faults and warnings is provided in section 7.8.5 and section 9.1.
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29
7. Front Panel Interface
7.1.3. Selecting a Module in the Lake Controller software via the Front Panel
It is sometimes useful to identify which Module icon/s in the Lake Controller software are associated with a
particular hardware Frame. To highlight the module in the Lake Controller software:
1. Ensure Meter Mode is selected and in Module view.
2. Press the button adjacent to the Module description on the left LCD. The corresponding module will show
highlighted text on the Lake Controller screen.
If the Frame is online, but the Module is not in the work area, the selected Module will be centered on the Module
scroll bar (assuming the Modules Menu is selected in the Lake Controller).
7.2. Front Panel Key Lock
It is possible to lock the front panel buttons for security purposes. When this function is active, all front panel
controls (except power state) are disabled and all adjustment must be made via the network. To lock controls,
press and hold button A then simultaneously press button B as shown in Figure 7.2; repeat this process to
unlock.
1. Press + Hold A
2. Press B
Figure 7.2: Locking / Unlocking Front Panel Controls
Note: A key icon will appear at the top of the display when the Front Panel is locked.
7.3. Power Button
The unit is powered on by pressing the top-left button on the front panel, labelled 4 in Figure 7.1. It has a
bi-color power symbol which illuminates red when connected to the AC mains and the unit is in standby mode.
It turns green when the button is pressed to turn the unit on. A subsequent press of this button returns the unit
to standby mode.
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7.4. Mute Enable Button
The dynamic function buttons to the immediate left and right of the LCD are used as MUTE buttons only when
the MUTE ENABLE button 5 is activated (flashing).
When MUTE ENABLE is activated the MUTE ENABLE button will flash and the four buttons on the left act
as Module or Input Router mute controls (depending on active view) and the four buttons on the right enable
muting/unmuting of the Amplifier Channel (power outputs).
In Meter Mode > Home View with MUTE ENABLE activated, text on the LCD adjacent to each button indicates
when a Module input or Amplifier Channel power output has been muted. Meter Mode must be selected for
MUTE ENABLE to be activated; MUTE ENABLE is not available in Menu Mode.
To exit MUTE ENABLE mode, press the flashing MUTE ENABLE button. If no mute activity occurs for two
minutes, MUTE ENABLE mode will automatically be disabled.
7.5. Meter Button
The front panel display has two main operating modes, Meter Mode (default) and Menu Mode. In normal
operation, the display will be in Meter Mode.
The following views are available in Meter Mode: Home View (default), Amplifier View / LoadPilot View,
Temperature View, Input View and Module View. Pressing the METER 6 button scrolls through these views.
Pressing the METER button when in Menu Mode will return the system to Meter Mode, with the Home View
displayed.
7.6. Menu Button
Menu Mode is selected by pressing the MENU button 7 . The screen displays the top level menu with various
submenu options. Press the button adjacent to the required submenu to select it.
Pressing the MENU button while in Menu Mode will display the previous menu level.
Menu Mode is used for processor configuration, or for editing a parameter. Please refer to section 7.11 for
further details.
7.7. Exit Button
In Menu Mode, pressing the EXIT button
the display to the Home View.
12
returns back one menu level. In Meter Mode, pressing EXIT returns
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7. Front Panel Interface
7.8. Dynamic Buttons, Controls and LEDs
B
A
C
D
Figure 7.3: LCD with Dynamic Buttons, Controls and LEDs
7.8.1. Communication LED
A
This bright white LED signifies selection in the Lake Controller, or Controller communication providing visual
confirmation of:
1. Network communication between the Lake Controller and the Lake Processor (Flashing LED).
2. Selection of the Lake Processor in the Lake Controller software (Steady LED).
Note: The Communication LED can be dimmed via the front panel by selecting Frame menu, and
then Front > Dimming. Dimming affects all LEDs as well as the backlight of the display.
7.8.2. Frame Faults and Warnings LED
B
All four LEDs on the left flash/off red to indicate a Frame fault and flash yellow/mute state to indicate a Frame
warning. Additional clarification of the current fault or warning is displayed in the bar of the LCD. All mute, fault and
warning states displayed on the front panel are summarized in section 9.1.
Additional faults and warnings are reported in the Event Log of the Lake Controller only. All faults and warnings
recorded in the Event Log are listed in section 9.1 along with scenarios that may have arisen to cause them.
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7.8.3. Rotary Encoder
C
The rotary encoder is used to adjust parameters in conjunction with the selection made via the dynamic function
buttons and LCD menus. The ring around the rotary encoder illuminates when a selected parameter is available for
adjustment.
Turn the encoder clockwise to increase the selected parameter, or counter-clockwise to decrease the value.
Parameters with only two states (e.g. ON, OFF) are toggled by turning clockwise or counter-clockwise. Some
parameters enable simultaneous adjustment of a combination of input and output channels.
To select which channels are adjusted:
1. Press the associated soft button/s to select the parameter/s for editing. A selected parameter is indicated by
inverse text and background color.
2. Use the rotary encoder to change the value.
It is possible to select multiple parameters for simultaneous editing even if the values are different on each channel.
Turning the rotary encoder will adjust each parameter by the same increment. When in Meter Mode, the rotary
encoder allows the user to change between the available meter views.
Note: Some menus permit parameters to be adjusted across multiple channels simultaneously by
default.
7.8.4. Dynamic Function Buttons
D
The buttons surrounding the display are unlabeled because their functions change according to the currently
selected menu or display.
In Meter Mode with MUTE ENABLE activated, these dynamic function buttons are used to mute or unmute the
Module Inputs and power output channels.
In Menu Mode these buttons are used to navigate the menu structure. This is indicated by a thin line on the display
closest to the button used. During menu navigation, the color of the embedded LEDs continues to indicate the
mute status, clips, or faults and warnings relevant to the associated input or output channel on the PLM+.
Note: Each button contains a tricolor LED which conveys fault and warning indications in addition to
the mute status. The LED color does not necessarily correspond to the currently selected function.
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7. Front Panel Interface
7.8.4.1. Mute Functions
The PLM+ provides mute functions at several different points in its audio chain. Please refer to section 6.1 for
further information. The four types of mute are:
1.
2.
3.
4.
PLM+ Input Router Mute
Module Input Mute
Module Output Mute
Power Output Mute
With the exception of Module output mutes, all types may be controlled from the PLM+ front panel in Meter Mode
by activating MUTE ENABLE and selecting the associated input or output Meter View using the METER button.
Module Ouput Mute is available in Menu mode Module > Mute.
Note: Module input and output mutes can be controlled in Menu Mode via the MENU button. All mutes
can also be controlled from the Lake Controller.
7.8.4.2. PLM+ Input Router Mute
The PLM+ Input Router mute provides the ability to simultaneously mute/unmute all modules or outputs that are
sourced from the PLM+ input. To mute or unmute the PLM+ inputs:
1. Press METER until the Input Meter View is displayed
2. Press MUTE ENABLE
3. Use the associated dynamic function buttons to mute / unmute the PLM+ input router to the left.
Note: The PLM+ Input Router Mute is within the Lake Processing system, post input type selection,
and pre input mixing and routing.
Please refer to the Lake Controller User Manual for details of mute selection via the software.
7.8.4.3. Module Input Mute
The Module input mute provides the ability to mute/unmute the audio signal at the module level. Therefore, the
PLM+ Input Router (described in section 7.8.4.2) remains unmuted and can be used by another module. To mute
or unmute a Module input:
1. Press METER until Home View is displayed
2. Press MUTE ENABLE
3. Use the associated dynamic function buttons to mute / unmute the Module inputs
Once the Module input is muted, the LED turns red and MOD. IN MUTE is displayed on the LCD. When unmuted,
the LED turns green (unless any other output warning conditions are active).
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
Note: Fault condition LED indications take priority over mute status indications. If a fault condition
occurs, the LED will indicate the fault by flashing and will note the mute status. When a Frame fault is
active the audio on all channels is muted.
Module Input Mutes may also be controlled in Menu Mode.
Please refer to the Lake Controller User Manual for details of mute selection via the software.
7.8.4.4. Module Output Mute
Module Output Mute is part of the Lake Processing system, at the crossover outputs. It is post Module output EQ
and level adjustment, pre PLM+’s protection circuitry.
Muting of the Module outputs is available via MUTE ENABLE in Module Meters view, as the PLM+ power output
mutes are assigned in this mode (see section 7.8.4.5). However, Module output mute status and control are also
available in Menu Mode and may also be viewed and controlled from the Lake Controller software.
Please refer to section 7.11.2.7 for details of selecting Module Output Mute in Menu Mode.
Refer to the Lake Controller User Manual for details of mute selection via the software.
7.8.4.5. Power Output Mute
The four dynamic function buttons to the right of the LCD control the Power Output Mutes of output channels 1-4.
These mutes are located within the PLM+’s power output stage.
When a PLM+ power output is muted, the LED turns red and the text AMP CH. MUTE is displayed on the LCD.
When unmuted, the LED turns green (unless any other output warning conditions are active).
Note: Fault condition LED indications take priority over mute status indications. If a fault condition
occurs, the LED will indicate the fault and not the mute status.
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35
7. Front Panel Interface
7.8.5. LED Fault, Warning and Clip Indication
B
D
A tricolor LED is embedded inside each of the eight dynamic function buttons. These convey a variety of status
indications including faults and warnings, signal clip indications, Module input mute, Module output mute and
Power Output mute. Table 7.4 summarizes the meaning of the LED indications.
LED Color
Indication
Green
Status Good / Unmuted
Yellow
Warning
Red
Fault / Muted
Flashing Red
Clip
Table 7.4: LED Fault and Warning Indications
Note: An unlit output LED indicates either the channel is not available for the model in use, or that the
power output channel is not routed to a Module output channel.
7.8.5.1. Clip Indication
The front panel LEDs also indicate input and output clip or pre-clip conditions that can occur within the PLM+.
Input Clip
Input clipping is monitored at two stages in the signal path:
• Analog Input Stage: If the input signal exceeds either +26 dBu, a clip indication is displayed.
• A warning is displayed at +24 dBu (i.e. 2 dB from Clip)
• Module Input Stage: If the signal level at this point exceeds +21 dBu, a clip indication is displayed.
Input clipping is indicated by the affected Module LED flashing red and INPUT CLIP displayed on the LCD. If a
subsequent input clip within 400 ms is detected, the LED remains lit for a longer period.
Output Clip
All output channels are monitored by a suite of protection circuits that include a Current Peak Limiter (CPL) and an
Inter-Sample Voltage Peak Limiter (ISVPL).
The ISVPL will indicate clip only when exceeding the amplifier’s maximum output voltage. If the ISVPL is set so as
to limit the output below maximum voltage, then clip indication will not occur when reaching the ISVPL threshold.
Please refer to section 5.3 for further information.
If CPL protection is active, or a voltage clip occurs, then the associated Power Output Channel LED will flash red
and a text warning will be displayed on the screen.
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7.8.5.2. Warning or Fault Indications
If certain parameters within the PLM+ approach or exceed preset limits, a warning condition or fault condition may
arise. One or more LEDs provide a visual indication of the problem, along with an on-screen description of the
condition displayed adjacent to the LED/s.
• A green LED confirms inputs or outputs are unmuted and operating normally
• A yellow LED signifies a warning of potential problems in the PLM+ amplifier stages
• A red LED indicates a fault, clip or mute
An Event Log file lists all warnings with date and time stamps; please refer to the Lake Controller Operation Manual
for further information the Event Log.
Please refer to Table 7.5 and Table 7.6 below, and to Table 9.1 for a detailed description of faults and warnings.
7.9. Warning and Fault Indications
Table 7.5 lists the warning conditions signified by a yellow LED; Table 7.6 lists the fault conditions signified by a
red LED.
Warning
Amp Temp Limit
Type
Frame
LED No.
On Screen
Warning Text
1
ATL ACTIVE
Event Log Text
N/A
AES Clock Slipping
Module
1
CLOCK SLIPPING
AES Clock Slipping
Amp Temp Warning
Channel
5-8
TEMP WARN:CH
Temp Warning: Amp Channel
BEL Active
Frame
1
BEL ACTIVE
N/A
Controller Offline
Frame
1
CTRL OFFLINE
N/A
Device Name Conflict
Frame
1
NAME CONFLICT
Dante Device Name Conflict
Frame Offline
-
1
OFFLINE
Frame Offline
Load Not Verified
Module Channel
2+3
5-8
LOAD NOT VER
LoadSmart: Load Not Verified
Load Uncertain
Channel
5-8
UNCERTAIN LOAD
Uncertain About Load Type
PSU Mains Glitch
Frame
1
MAINS GLITCH
Glitch on Mains Voltage Detected
PSU Power Limit
Frame
1
PAL ACTIVE
N/A
PSU Temp Limit
Frame
1
PTL ACTIVE
N/A
PSU Temp Warning
Frame
1
TEMP WARN:PSU
Temp Warning: Power Supply Unit
Sense Fault
Frame
1
SENSE FAULT
Frame Warning: Sense Fault
Speaker / Cable Shorted
Channel
5-8
SPKR SHORTED
Speaker / Cable Shorted
Speaker Over Count
Channel
5-8
OVER SPKR CNT
Over Speaker Count
Speaker Under Count
Channel
5-8
UNDER SPKR CNT
Under Speaker Count
Speaker Damaged
Channel
5-8
SPKR DAMAGED
Speaker Component Damaged
SpeakerSafe Not Started
Channel
5-8
SPKSAFE INACT
SpeakerSafe Not Started
SpeakerSafe Precision Low
Channel
5-8
LM PREC. LOW
Speaker Precision Low
Under Voltage Limit
Frame
1
UVL ACTIVE
N/A
Table 7.5: Warning Conditions (Yellow LED)
PLM+ SERIES Operation Manual rev 1.0.0
37
7. Front Panel Interface
Warning
Type
On Screen
Warning Text
Event Log Text
Amp Ch Mute
Channel
5-8
AMP CH. MUTE
Amp Channel Mute
Amp Temp Fault
Channel
5-8
TEMP FLT:CH
Temp Fault: Amp Channel
Analog Input Fault
Frame
1
ANALOG IN FAULT
Frame Fault: Analog Input
Check AC Mains
Frame
1
CHECK AC MAINS
Frame Fault: Check AC Mains
Current Average Limiter
Channel
5-8
CAL ACTIVE
N/A
Current Protection Limiter
Channel
5-8
CURRENT CLIP
N/A
DSP Area Temp Fault
Frame
1
TEMP FLT:DSP
Temp Fault: DSP Area
Input Channel Mute
Inp.Mix
2+3
INPUT MUTE
Input Mute
Internal Audio Interface Fault
Frame
1
AUDIO FAULT
Frame Fault: Audio Interface
Module Input Mute
Module
2+3
MOD. IN MUTE
Module Input Mute
Module Output Clip
Module
2+3
MOD. CLIP
N/A
Module Output Mute
Channel
5-8
MOD. OUT MUTE
Module Output Mute
No Input Source Available
Module
2+3
NO INPUT
No Input Source
No Load Detected at Output
Channel
5-8
NO LOAD
Channel Fault: No Load Detected
Physical Input Clip
Module
2+3
INPUT CLIP
N/A
Power Average Limiter
Frame
1
PAL ACTIVE
N/A
Power Channel Failure
Channel
5-8
SERVICE CH.
Channel Fault: Unit Needs Service
PSU Area Temp Fault
Frame
1
TEMP FLT:PSU
Temp Fault: Power Supply Unit
PSU Fault / Undervoltage
Frame
1
PSU FAULT
Frame Fault: PSU Undervoltage
PSU Mains Over Voltage Peak
Frame
1
MAINS > 400 VPK
Frame Fault: PSU Mains > 400 VPK
PSU Mains Over Voltage RMS
Frame
1
MAINS > 270 V
Frame Fault: PSU Mains > 270 V
PSU Mains Under Voltage
Frame
1
MAINS < 65 V
Frame Fault: PSU Mains < 65 V
PSU Needs Service 1
Frame
1
NEEDS SERVICE: 1
Frame Fault: Needs Service: 1
PSU Needs Service: 2
Frame
1
NEEDS SERVICE: 2
Frame Fault: Needs Service: 2
PSU Needs Service 3
Frame
1
NEEDS SERVICE: 3
Frame Fault: Needs Service: 3
PSU Needs Service: 4
Frame
1
NEEDS SERVICE: 4
Frame Fault: Needs Service: 4
PSU Needs Service 5
Frame
1
NEEDS SERVICE: 5
Frame Fault: Needs Service: 5
PSU Needs Service: 6
Frame
1
NEEDS SERVICE: 6
Frame Fault: Needs Service: 6
PSU Needs Service 7
Frame
1
NEEDS SERVICE: 7
Frame Fault: Needs Service: 7
PSU Needs Service: 8
Frame
1
NEEDS SERVICE: 8
Frame Fault: Needs Service: 8
PSU Rail Protect
Frame
1
PSU POWER PROT
Frame Fault: PSU Power Protect
Short Circuit Protection
Channel
5-8
SHORT CIRCUIT
Channel Fault: Short Circuit Protection
Speaker Magnet Temp Fault
Channel
5-8
TEMP FLT: MAG
Temp Fault: Speaker Magnet
Speaker VC Temp Fault
Channel
5-8
TEMP FLT: VC
Temp Fault: Speaker Voice Coil
VHF Protection
Channel
5-8
VHF FAULT
Channel Fault: Very High Frequency
Voltage Protection Limiter
Channel
5-8
VOLTAGE CLIP
N/A
Wrong Type of Speaker
Channel
5-8
WRONG LOAD
Load Type / Routing Mismatch
Table 7.6: Fault Conditions (Red LED)
38
LED No.
PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7.10. Meter Mode
7.10.1. Home View
The default view when powering on the device is Meter Mode > Home View as shown in Figure 7.7.
Figure 7.7: Meter Mode > Home View
Home View provides a summary of Module I/O gain level and limiter gain reduction, along with frame, module and
channel labeling information. The example in Figure 7.7 shows a mono 2-way, with Module A feeding power output
channels 1 & 2, and Module B configured as CL1-way feeding a subwoofer on power output channel 3.
Module C is configured for driving a full-range loudspeaker on power output 4. Module D is unused in this
example.
1
2
3
4
5
6
7
8
9
Module A label, input gain meter, faults, warnings, clips & mutes.
Module B label, input gain meter, faults, warnings, clips & mutes.
Module A label, input gain meter, faults, warnings, clips & mutes.
Module D label, input gain meter, faults, warnings, clips & mutes.
Module output label for Power channel 1, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction
faults, warnings, clips & mutes.
Module output label for Power channel 2, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction
faults, warnings, clips & mutes.
Module output label for Power channel 3, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction
faults, warnings, clips & mutes.
Module output label for Power channel 4, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction
faults, warnings, clips & mutes.
Menu Bar: Current View title & Frame label, Frame faults and warnings. The menu bar is located by default at
the top of the display, but can be configured in the front panel menu for placement at the bottom. The following
indications, as active or applicable, also are shown on the menu bar.
Ω - AES3 Input Terminated (no icon = Unterminated)
- Analog Inputs Iso-Float Grounded (no icon = Floating)
- Dante Clock Master (no icon = Dante Slave or Dante Disabled)
- Dante Slave Only (no icon = device may be used as Dante Clock Master)
REDUNDANT - Dual Redundancy networking enabled. (No icon = configured for switch mode)
Please refer to Table 7.5 and Table 7.6 for full details on the faults and warnings that could be displayed in any of
the above locations.
PLM+ SERIES Operation Manual rev 1.0.0
39
7. Front Panel Interface
Note: Output limiter (gain reduction) meters take into account the sum of PLM+ ISVPL and Lake
LimiterMax.
10 The icons in the center of the LCD indicate the amplifier channel to which each module output is routed. When
two amplifier channels are Bridged, both channels will be displayed.
The type of icon used in the center of the screen confirms whether the PLM+ outputs are configured in Standard
mode or Bridge Mode, as shown in Figure 7.8 For further information on Bridge Mode, please refer to section
8.1.1.
Figure 7.8: Standard and Bridge Mode Front Panel Icons
Bridge Mode is visible via this icon notation on the PLM+ Front Panel in Home View, however, the Lake Controller
must be used to configure Bridge Mode; please refer to the Lake Controller Operation Manual for further
information.
Home View looks similar for most configurations, with slight variations dependant on the PLM+ model and
processor configuration.
7.10.2. Amplifier Meters View
Amplifier Meters View provides further signal level information in the form of additional power output meters as
shown in Figure 7.9.
Figure 7.9: Meter Mode > Amplifier Meters View
1
2
3
4
5
40
Output 1: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter
Output 2: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter
Output 3: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter
Output 4: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter
LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status
PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
6
7
8
9
•
•
•
•
LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status
LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status
LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status
Current View title & Frame label, Frame faults and warnings
The Voltage Meter (V) indicates the power output stage voltage relative to its clip level
The Current Meter (I) indicates the current the power output stage is driving into its load, relative to the
maximum permissible current the fixed CPL allows
The Power Meter (P) indicates the instantaneous output power being developed in the load relative to the
PLM+s maximum output power capability.
The Gain Reduction Meter (L) indicates the degree of limiting being applied by the PLM+ ISVPL and/or the Lake
LimiterMax.
7.10.3. Temperature View
Temperature View provides information about the current operating temperatures within the PLM+. Selected fuse
type, as well as Mains Voltage and Current draw.
Figure 7.10: Meter Mode > Temperature View
1
2
3
4
5
6
7
8
9
Current View title. Power supply temp (PSU) & Lake processor temp (DSP) as percentage of maximum
Unused in Temperature View
Unused in Temperature View
Breaker Emulation Limiter; selected Fuse type - Mains Voltage - Mains Current Draw
Output 1: AMP - Temp of power output as percentage of maximum
Output 2: AMP - Temp of power output as percentage of maximum
Output 3: AMP - Temp of power output as percentage of maximum
Output 4: AMP - Temp of power output as percentage of maximum
Current View title & Frame label, Frame faults and warnings
PLM+ SERIES Operation Manual rev 1.0.0
41
7. Front Panel Interface
7.10.4. Input Meters View
Input View enables inspection of the source selected to each input router; input signal level before the input mixer
(i.e. prior to the Home View Module input meters); Module Input Mixer Routing; as well as Input Connection status.
Figure 7.11: Meter Mode > Input Meters View
1
2
3
4
5
6
7
8
9
Input Router 1: Selected input type, input gain level (relative to clip), router fault/warning/clip
Input Router 2: Selected input type, input gain level (relative to clip), router fault/warning/clip
Input Router 3: Selected input type, input gain level (relative to clip), router fault/warning/clip
Input Router 4: Selected input type, input gain level (relative to clip), router fault/warning/clip
Module A Input Mixer, Module A input level meter, Input 1 Connection Status
Module B Input Mixer, Module A input level meter, Input 1 Connection Status
Module C Input Mixer, Module A input level meter, Input 1 Connection Status
Module D Input Mixer, Module A input level meter, Input 1 Connection Status
Current View title & Frame label, Frame faults and warnings
7.10.5. Module Meters View
Module View provides further signal level information in the form of additional power output meters as
shown in Figure 7.12.
Figure 7.12: Meter Mode > Module Meters View
1
2
3
4
42
Module A label and input gain meter
Module B label and input gain meter
Module C label and input gain meter
Module D label and input gain meter
PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
5
6
7
8
9
Output 1: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction
Output 2: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction
Output 3: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction
Output 4: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction
Current View title & Frame label, Frame faults and warnings
7.11. Menu Mode
7.11.1. Overview
The majority of functions can be accessed via Menu Mode on the front panel. These functions include the
adjustment of gain, delay, limiters, input and output routing, and the ability to recall Frame Presets. Menu Mode can
be accessed at any time by pressing the MENU button.
After pressing the MENU button, various submenu options are displayed as shown in the figure below.
Figure 7.13: Menu Mode > Main Menu
Press the illuminated button adjacent to the required option to display an associated submenu. When parameter
level is reached, individual parameters may be selected for adjustment by pressing the adjacent button. The
selected parameter value/s are highlighted, and are adjustable using the rotary encoder.
A parameter may be adjusted simultaneously across multiple channels by selecting all values to be adjusted;
any current value offsets are retained. Some parameters default to multiple selections, with all inputs or outputs
adjusted simultaneously. Changes are effected in real-time and are stored without further confirmation. Pressing
EXIT returns to the previous menu level, automatically retaining any parameter changes.
Note: All parameters are also editable via the Lake Controller unless specified otherwise.
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7. Front Panel Interface
7.11.1.1. Parameters with Individual Values and Group Totals
The following parameters display two values:
•
•
•
•
MODULE
MODULE
MODULE
MODULE
>
>
>
>
GAIN
DELAY
LIMITERS > MAXRMS LEVEL
LIMITERS > MAXPEAK LEVEL
The Module parameter can be adjusted using the rotary encoder. The Group total (shown in brackets) is only
adjustable using the Groups function in the Lake Controller.
The Group total is the sum of the individual Module value plus any values for this parameter on all Groups to which
the Module is assigned. Please refer to the Lake Controller Operation Manual for further information on Groups.
7.11.1.2. Menu Structure Overview
From the Main Menu, the following submenus are available, as shown in Figure 7.13 and described in the following
sections.
• MODULE (See section 7.11.2)
• Input Mixer
• Gain
• Delay
• Polarity
• Amp Gain
• Limiters
• Mute
• INPUT/OUTPUT CONFIGURATION (See section 7.11.3)
• Input Router 1 - 4
• AES Termination
• Iso-Float
• Output Router
• ATTENUATION (See section 7.11.4)
• FRAME (See section 7.11.5)
• Frame Information
• Frame Reset
• BEL Configuration
• Network
• Latency Match
• Front Panel
• FRAME PRESETS (See section 7.11.7)
• Preset Recall
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• LOAD MONITOR (See section 7.11.8)
• Configure No. of Cabinets in Parallel
• LoadSmart Verification
• Estimated No. of Cabinets
7.11.2. Module Submenu
Only module output channels for routed Power channels are displayed. This applies to all module output
configurations described below.
MENU > MODULE
After selecting the Module Menu, the screen shown in Figure 7.14 is displayed. Press the illuminated button
adjacent to the required option to view or edit the associated parameters.
Figure 7.14: Module Submenu
7.11.2.1. Input Mixer
MENU > MODULE > INPUT MIXER
Press the illuminated button next to Input Mixers A – D. Selected mixer will show four Routers (1-4) adjacent to
the right-hand buttons. Use buttons to select Router(s) and use the rotary encoder to change level values within
defined limits to configure the mixer. Multiple Routers may be selected simultaneously.
Figure 7.15: Input Mixer
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7. Front Panel Interface
7.11.2.2. Gain
MENU > MODULE > GAIN
Figure 7.16: Module Gain Edit Screen
Press the illuminated button next to the module input/s and/or output/s for adjustment, and use the rotary encoder
to change the value(s). Multiple gain values may be adjusted simultaneously in 0.1 dB increments, subject to
defined level limits.
7.11.2.3 Delay
MENU > MODULE > DELAY
Press the illuminated button next to the input/s and/or output/s for adjustment, and use the rotary encoder to
change the value/s. Multiple delay values may be adjusted simultaneously in 0.1 ms increments, subject to defined
level limits.
The audio signal may be delayed (typically for reasons of driver or delay subsystem alignment) at either the Module
inputs or on individual outputs. Delay added at the inputs affects all outputs equally, and will be generally be
introduced to time-align arrays of loudspeakers at different locations. Delaying individual outputs may be desirable
to time-align drivers in the same cabinet or array.
7.11.2.4. Phase (Polarity)
MENU > MODULE > PHASE
Press the illuminated button next to the input/s and/or output/s to be adjusted, and use the rotary encoder to
change the value/s. Phase may be changed on one input or output at a time.
Audio phase reversal is available at the inputs to Modules A - D, and also individually on the four output channels.
The LCD displays ‘Positive’ for normal operation and ‘Negative’ when the phase is inverted.
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PLM+ SERIES Operation Manual rev 1.0.0
7. Front Panel Interface
7.11.2.5. Amp Gain
MENU > MODULE > AMP GAIN
By default, all outputs are selected; use the rotary encoder to change the gain of all power outputs or press the
associated output button to deselect one or more outputs.
Amp Gain adjusts the gain of the PLM+’s power output stage for each output channel. The default setting is
35 dB, variable in 0.1 dB increments from 22 dB to 44 dB. Care should be taken in altering Amp Gain, which
should be adjusted in conjunction with the Gain controls and limiter thresholds.
7.11.2.6. Limiters
MENU > MODULE > LIMITERS
Various parameters of the PLM+’s Inter-Sample Voltage Peak Limiter (ISVPL) and the Lake LimiterMax can be
adjusted via this submenu. By default, simultaneous adjustment of most limiter parameters across all output
channels is selected, although channels may be adjusted individually if required. Attack and Release times must be
adjusted individually per module DSP channel.
Inter-Sample Voltage Peak Limiter Threshold (ISVPL Threshold)
The ISVPL prevents the voltage of the PLM+ outputs from exceeding a pre-determined value. The ISVPL Threshold
can be adjusted between 17.8 V to 600 V, which represents the instantaneous peak voltage, not the RMS value of
the output signal. The actual value is displayed in brackets and can be limited by the maximum voltage a particular
PLM+ Series model can produce and/or by the RPM Power allocation algorithm. If RPM is active, “RPM” will be
displayed next to the Actual ISVPL values.
Inter-Sample Voltage Peak Limiter Profile (ISVPL Profile)
Selecting the ISVPL Profile will optimize the ISVPL limiting for the specific frequency band. ISVPL Profile permits
individual adjustments per channel between six profiles, providing appropriate attack and release times for the
ISVPL Limiter and Voltage Clip feedback to either minimize distortion or maximize SPL as described below.
1.
2.
3.
4.
5.
6.
Universal – Inter Sample, Optimized for low distortion, usable for all frequencies
Sub/LF – Inter Sample, Optimized for higher SPL below 600 Hz, usable for all frequencies
Sub – Optimized for high SPL, 20 - 200 Hz
LF – Optimized for high SPL, 20 - 1200 Hz
MF – Optimized for high SPL, 300 - 6000 Hz
HF – Optimized for high SPL, > 1 kHz
The default ISVPL Profile is UNIVERSAL.
MaxPeak Level (MaxPeakLvl)
This sets the maximum peak signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB
increments, subject to user-defined level limits. The Group total is displayed (in brackets) for each channel.
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7. Front Panel Interface
MaxRMS Level (MaxRMSLvl)
This sets the maximum RMS signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB
increments, subject to user-defined level limits. The Group total is displayed (in brackets) for each channel.
MaxRMS Corner (MaxRMSCor)
A soft-knee or hard-knee corner may be applied to the RMS Limiter. A soft-knee corner gently increases limiting as
the signal approaches the threshold; a hard-knee corner applies full limiting to any signal exceeding the threshold
by any amount, but none to signals below the threshold.
The Corner parameter is adjustable in 0.1 dB increments, subject to defined level limits. This figure represents the
level below the limiter threshold at which compression commences; the larger this negative value, the softer the
knee. A setting of 0 dB implies a hard-knee characteristic.
Note: LimiterMax provides peak and RMS limiting features, referred to as MaxPeak and MaxRMS
respectively. Full details regarding LimiterMax can be found in the Lake Controller Operation Manual.
MaxRMS Attack
The attack time may be set for the RMS Limiter. Limiter release values are set separately for each of the four
outputs in 0.10 ms increments.
MaxRMS Release
The release time may be set for the RMS Limiter. Limiter release values are set separately for each of the four
outputs in 0.10 ms increments.
7.11.2.7. Mutes
MENU > MODULE > MUTES
In Meter Mode, Module inputs and PLM+ power output channels can be muted using the MUTE ENABLE
function. The MUTE menu also provides mute status and control of the Module input mutes, but instead of the
PLM+ power output channel mutes, it provides the ability to mute the Lake Module outputs.
Press the associated dynamic function button/s to select the Module input/s and/or Module output/s to be
adjusted. Use the rotary encoder to toggle between the MUTED and UNMUTED states.
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7. Front Panel Interface
7.11.3. I/O Configuration
MENU > I/O CONFIG
Figure 7.17: I/O Configuration Sub Menu
This menu provides configuration options for input routing, along with settings for AES Termination and Iso-Float as
described in the following sections.
7.11.3.1. Input Router Configuration
MENU > I/O CONFIG > ROUTER
Figure 7.18: Input Router 1
The signal flow diagrams in chapter 6 highlight that there are four Input Routers available on PLM+ Series devices.
The input that is selected within the router can be used by the Input Mixer for any of the modules.
Each router has four priority levels allowing any input to be placed in a sequence providing automatic input signal
fail over. Dante and AES3 inputs have priority over analog inputs.
Note: Only one analog input is allowed in each router, and the analog input must be at the lowest
priority level in relation to any other inputs.
Two modes of input selection are available, Auto Select and Forced Selection. The selected setting is also visible
from the I/O STATUS screen on the front panel, and via the Lake Controller.
In Auto Select mode, Priority 1 is checked for a valid input signal; if no signal is found, Priority 2 is checked, and so
on until a valid signal is located; this process occurs if the currently selected input fails. In Forced Selection mode,
one of the four priorities is fixed regardless of whether a valid signal is present.
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7. Front Panel Interface
With a router selected on the front panel, press the middle button on the left of the LCD to activate this parameter
for editing. Use the illuminated rotary encoder to scroll through the following options:
•
•
•
•
•
Auto Select (default)
Force Priority 1
Force Priority 2
Force Priority 3
Force Priority 4
Assignment of Input Priority
Factory default settings assign Dante 1-4 to Priority 1, Dante 5-8 to Priority 2, AES3 1-4 to Priority 3 and Analog
1-4 to Priority 4. For example, for Input Router 1 Dante 1 on Prio1, Dante 5 on Prio2, AES3 ch1 on Prio 3 and
Analog 1 on Prio 4
To change these settings via the front panel, select Priority slot number to be changed and use the rotary encoder
to scroll through the available options. Due to the signal hierarchy it is not possible to assign an analog source to a
higher priority than a digital source.
Analog Input Sensitivity and Digital Gain Offset
Press a dynamic function to the right of the LCD to toggle the selection of input source and input sensitivity/digital
gain offset then use the rotary encoder to change the parameter.
The maximum input level accepted by the analog input pre-amplifiers without clipping is 26 dBu. Digital gain offset may
be applied to Dante or AES3 digital input signals in 0.1 dB increments from -100 dB to +15 dB.
7.11.3.2. AES3 Input Termination
MENU > I/O CONFIG > AES TERM
Figure 7.19: AES Termination
To adjust the AES3 Input Termination, select AES TERM from the Input Config menu then use the rotary encoder
to toggle the value. An icon is displayed in the bottom left of the display in Meter Mode when AES is set to
‘Terminated’.
For fault-free operation when using AES3 digital audio as an input source, inputs must be correctly terminated
with the characteristic impedance of 110 ohm. The Input Termination setting is determined by the method used to
distribute the AES3 signals.
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7. Front Panel Interface
The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be
set to UNTERMINATED. If an AES3 distribution amplifier (DA) is being used to distribute the digital audio signals,
with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only
terminate the last PLM+ device in the chain.
7.11.3.3. Iso-Float
MENU > I/O CONFIG > ISO-FLOAT
Figure 7.20: Iso-Float
To change the Iso-Float setting, adjust the value using the rotary encoder. The current settings are also displayed
on the front panel I/O STATUS screen.
The analog inputs utilize Iso-Float transformerless electronic balancing circuitry. This provides electrical isolation
from an analog source comparable to that achieved with transformer-based designs. However, pin 1 of the XLR
input connector may be connected to ground within the device if desired. This option is selected by using the
rotary encoder to toggle between FLOATING and GROUNDED.
It may be necessary to change this setting to resolve ground loop problems when using analog inputs.
7.11.3.4. Output Router
MENU > I/O CONFIG > OUTPUT RTR
With PLM+ Series, Module output routing to Power outputs as well as AES or Analog to Dante output routing is
accessible through the Front panel interface.
Figure 7.21: Output Router
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51
7. Front Panel Interface
1
2
3
4
5
6
7
8
9
Toggle the Source from which you want to route the channels (Module, Analog, AES)
Toggle up among the available source channels
Toggle down among the available source channels
Unused
Unused
Toggle left among the available outputs
Toggle right among the available outputs
Disconnect all Dante assignments
Turn Right to Route / Turn Left to Un-route
Use the arrows visible on the display (2-3, 6-7) to toggle between available sources and outputs. Use the rotary
encoder to select the output you want to connect to (power outputs or Dante). Selected output is marked with an
“X” when routed and “O” when not routed.
Selecting 8 brings up a warning screen.
7.11.4. Attenuation Submenu
MENU > ATTENUATION
The default setting of 0.00 dB (i.e. no attenuation) is adjustable in 0.25 dB increments down to -100 dB.
Adjustment of attenuation at the input to the PLM+ power stage is available on a per-channel basis. This
adjustment is the PLM+ equivalent of a conventional amplifier level control. The power output channels may be
turned down using these parameters before powering on or off. Please refer to the signal flow diagram in
Figure 6.2.
By default, all channels are deselected. Press the SEL ALL button to select/deselect all channel, or, press a single
button on the right to adjust a channel individually.
Note: Only ONE channel or ALL channels may be adjusted. It is not possible to adjust only two or three
channels.
7.11.5. Frame Submenu
MENU > FRAME
The Frame Menu provides information and options relating to the device PLM+ as a physical unit. It is referred to
as a Frame for consistency with Lake Controller terminology.
The Frame Label as defined in the Lake Controller is displayed in this menu. It is also displayed at the top-left of the
screen in Meter Mode, Home View.
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7. Front Panel Interface
7.11.5.1. Frame Info
MENU > FRAME > FRAME INFO
Frame Info provides information about the device settings and configuration. All data in this front panel menu is
read-only; some parameters are fixed, and some can be changed only via the Lake Controller software.
Firmware Version (FW Version)
The firmware version numbers are displayed on left side of screen. This information can be used to verify that the
latest firmware is installed and is useful if a technical issue arises.
Further internal version numbers are displayed on right side of screen; Bundle, DSP, FPGA and Safe Image version.
Serial Number (Serial No.)
The printed serial number on the back panel of the PLM+ is also electronically embedded in the hardware, and
therefore cannot be removed or altered if stolen.
Max Output Voltage (MaxOutVolt)
Displays the maximum output voltage per channel that can exist across the PLM+’s output terminals. This is the
absolute maximum, not the voltage defined by the ISVPL setting.
Note: When Bridge Mode is activated, double the channel output voltage is available.
Max Output Current (MaxOutCurr)
Displays the maximum output current that can be delivered by the PLM+, summed across all output channels.
7.11.5.2. Frame Reset and Configuration
MENU > FRAME > RESET
Use this option to display a further menu with options to reset all parameters back to their original factory default
values. See section 9.3 for a full list of the default factory reset parameter values. Two types of reset are provided:
Factory Reset and Soft Reset.
Factory Reset
A Factory Reset will reset all settings and parameters to the original factory-defined default values. This includes
the deletion of any Frame Presets stored within the device. It also resets the IP Address and all network related
settings including the Dual Redundancy setting; a hard power cycle is required to complete this reset.
Soft Reset
A Soft Reset will reset all settings and parameters to the original factory-defined default values, but retains Frame
Preset information and IP / Network configuration. A power cycle is not required to complete this type of reset.
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7. Front Panel Interface
7.11.5.3. Breaker Emulation Limiter
MENU > FRAME > BEL CONF
The Breaker Emulation Limiter (BEL) provides Ampere selection (5-32 A) and breaker type selection
(CONSERVATIVE, FAST and UNIVERSAL). Select by pressing the adjacent button then use the rotary encoder to
change the parameter.
The maximum RMS input current varies between the 12K44 and 20K44; therefore, a desired value is configured
and the actual value is displayed within brackets.
7.11.5.4. Network
MENU > FRAME > NETWORK
Pressing the NETWORK button displays a further screen containing network configuration information. All
parameters (except Redundancy) are view-only on the front panel and are either not editable, or can only be
adjusted via the Lake Controller.
A summary at the top right of the screen confirms whether a valid connection is present for both Ethernet ports,
and whether the Lake Controller is online.
•
•
•
•
•
•
•
IP Addr: Displays the Internet Protocol address for the selected unit and can only be changed via the Lake
Controller software. Please refer to the Lake Controller Operation Manual for further details.
MAC: Displays the unique Media Access Control Ethernet address for the processor. This value cannot be
changed.
Frame ID: Displays the Frame ID, a unique Lake product identifier that cannot be changed.
Primary and Secondary network connection status as well as Lake Controller connection status
Mask: Displays the IP address subnet mask for the selected unit and can only be changed via the Lake
Controller software. Please refer to the Lake Controller Operation Manual for further details.
IP Config: Displays the IP configuration of the device (Auto - Zero Conf, Auto - DHCP or Fixed IP)
Redundancy: Displays the dual redundancy status for the Frame (ON/OFF) This mode can be changed by
pressing the adjacent button and confirming on the following dialog screen. Changing redundancy mode
requires a power cycle to activate.
7.11.5.5. Latency Match
To turn Latency Match on or off, select the parameter using the adjacent button then change the status using the
rotary encoder.
By default, PLM+ products exhibit the exact same input-to-output latency as the PLM and D Series products.
However, the PLM+, PLM and D Series products have a greater latency compared to the Lake processors of LM
Series. By enabling the Latency Match feature, the LM Series will add delay to match overall processing delay of
the PLM, PLM+, and D Series. This regards Analog and AES only. Dante is not part of Latency match.
Exception: Latency match will not function correctly when running 48k based AES input using the primary clock
domain.
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7. Front Panel Interface
7.11.6. Front Panel Display Controls
MENU > FRAME > FRONT
Contrast
To adjust the front panel LCD contrast, select this option then use the rotary encoder to change the value.
Dimming
To adjust the front panel LCD & LED brightness, select this option then use the rotary encoder to change the value.
Channel Order
To adjust the order in which both inputs and outputs are displayed on the front panel in all views, select this option
then use the rotary encoder to change the value between TOP-DOWN (default) and BOTTOM-UP.
7.11.7. Frame Preset Menu
MENU > FRAME PRST
To recall an existing Frame Preset, use the rotary encoder to select the required Preset then press the RECALL
button to overwrite the current configuration.
Note: Frame Presets must initially be created in the Lake Controller, and stored as a Preset using the
Lake Controller or the PLM+ Series Preset Manager.
Up to 100 Frame Presets can be stored in the device. The data within a Frame Preset includes the configuration
of all Modules in the Frame including levels, crossovers, EQ, input mixer, and output routing. (Note that Network
settings and the Dual Redundancy setting are not part of Frame Presets.)
As Frame Presets are stored within the device, complete processor configurations can be recalled without
connecting the device to a PC.
7.11.8. Load Monitor Menu (LoadSmart)
MENU > LOAD MON
Figure 7.22: LoadSmart Verification Results Screen
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7. Front Panel Interface
7.11.8.1. Configure # of Cabinets in Parallel
This option allows selection of the number of speaker cabinets connected to each PLM+ output channel. Select
individual or multiple outputs and use the rotary encoder to set the value from 1 to 4. This value is used by
LoadSmart to confirm the correct connection and status of the speakers connected to each PLM+ channel.
7.11.8.2. LoadSmart Verification
Select this option to initiate LoadSmart verification, then select YES to continue. LoadSmart performs a rapid test
of all output channels, and displays the results on the LCD a few seconds later.
Figure 7.23: LoadSmart Verification Results Screen
The Load Results page provides three items of information per output channel:
•
•
•
56
Confirmation that the speaker connected matches the speaker fingerprint assigned to the channel. If no
Fingerprint is assigned, NO MODEL will be displayed. If the wrong speaker is connected; “Wrong Speaker”
will be displayed
Result of speaker cabinet count; this will either be OK or WRONG.
Estimated number of speakers connected to the channel.
PLM+ SERIES Operation Manual rev 1.0.0
8. Back Panel Interface
8. Back Panel Interface
An overview of the back panel interface is provided in section 4.2. This chapter describes each cluster of
connections as shown in Figure 8.1.
1
3
INPUT 1
SPEAKER OUTPUTS
INPUT 2
4
INPUT 3
INPUT 4
INPUT 1-2
5
INPUT 3-4
1Gbps PRIM
ACT
6
1Gbps SEC
LINK
ACT
LINK
PLM 12K44
100-240V
2400-2950W
50-60Hz
CH 3
BRIDGE
BRIDGE
CH 1
CH 2
CH 4
ANALOG WITH ISO-FLOAT
TM
PIN 1: SCRN 2: POS 3: NEG
AES/EBU
SWITCHED 100/1000 Base-TX
Made in Sweden
CLASS 3 WIRING
Ser. N:o
Must be grounded/earthed
Removed!
SPEAKER OUTPUTS
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 1-2
INPUT 3-4
1Gbps PRIM
ACT
LINK
1Gbps SEC
ACT
LINK
PLM 12K44
100-240V
2400-2950W
50-60Hz
2
ANALOG WITH ISO-FLOAT
CLASS 3
WIRING
1+/- CH 1+/2+/- CH 2+/1+:+
BRIDGE CH 1 & 2: 2- : -
1+/- CH 1+/2+/- CH 2+/-
3+/- CH 3+/4+/- CH 4+/-
TM
PIN 1: SCRN 2: POS 3: NEG
AES/EBU
SWITCHED 100/1000 Base-TX
1+/- CH 3+/2+/- CH 4+/BRIDGE CH 3 & 4: 1+ : +, 2- : -
Made in Sweden
Must be grounded/earthed
Figure 8.1: Back Panel Interface
8.1. Speaker Outputs
The PLM+ is available with either 4 mm binding posts or Neutrik speakON connectors for the outputs.
The outputs of the PLM+ can produce a high voltage. Do not connect or disconnect loudspeaker/s while the
PLM+ is powered on. Never operate the PLM+ with any portion of bare loudspeaker wire exposed.
For speakON connector versions, do not use mating plugs without the rear covers in place.
8.1.1. Bridge Mode
Power outputs may be bridged on all PLM+ models by following the configuration instructions in the Lake
Controller Operation Manual (I/O CONFIG > OUTPUT CONFIGURATION) and the wiring instructions in this chapter.
Bridge Mode can only be activated/deactivated using the Lake Controller software.
Note: When Bridge Mode is activated, CLASS 3 wiring is required.
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8. Back Panel Interface
8.1.2. speakON Connectors
1
On both PLM+ models, the power outputs are simultaneously available on a single 8-pole speakON connector,
and on two 4-pole speakON connectors. The two 4-pole connectors carry the outputs of channels 1 & 2 and 3 &
4 respectively.
SPEAKER OUTPUTS
CLASS 3
WIRING
1+/- CH 1+/2+/- CH 2+/1+:+
BRIDGE CH 1 & 2: 2- : -
1+/- CH 1+/2+/- CH 2+/-
1+/- CH 3+/2+/- CH 4+/BRIDGE CH 3 & 4: 1+ : +, 2- : -
3+/- CH 3+/4+/- CH 4+/-
Figure 8.2: speakON Connections
1
2
NL4
PLM+ Output
Channels 1 & 2
BRIDGE MODE
NL4
PLM+ Output
Channels 1 & 2
1
2
1
NL4
PLM+ Output
Channels 2 & 1
Figure 8.3: speakON wiring and pinouts (Bridge Mode)
4+
1+
41+
31-
3+
1-
22+
2+
2NL4
PLM+ Output
Channels 1 & 2
NL4
PLM+ Output
Channels 3 & 4
3+
3-
4+
4NL8
PLM+ Output
Channels 1 - 4
Figure 8.4: speakON NL4/NL8 Configuration
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8. Back Panel Interface
4+
41+
31-
3+
22+
1+
2-
3+
4-
NL4
PLM+ Output
Channels 1 & 2
NL8
PLM+ Output
Channels 1 - 4
NL4
PLM+ Output
Channels 3 & 4
Figure 8.5: speakON NL4/NL8 Configuration
8.1.3. Binding Post Connectors
Binding post versions of the PLM+ are fitted with four pairs of black and red 4 mm binding posts.
SPEAKER OUTPUTS
CH 3
BRIDGE
BRIDGE
CH 1
CH 2
CH 4
CLASS 3 WIRING
Figure 8.6: Binding Post Configuration
SPEAKER OUTPUTS
CH 3
BRIDGE
CH 2
BRIDGE
CH 1
CH 4
CLASS 3 WIRING
Figure 8.7: Binding Post Configuration (Bridge Mode)
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59
8. Back Panel Interface
Connect the ‘+’ loudspeaker terminals to the red binding posts and the ‘ – ‘ terminals to the black binding posts.
There are three methods of connecting speaker cables to the binding posts.
1.
2.
3.
Solder 4 mm banana-plugs to the ends of the speaker wires and plug into the center of the turrets.
Thread the stripped ends of the wires through the holes in the posts. Enter the wires for output channels 1 and
3 from above and for channels 2 and 4 from below. Tighten the plastic turrets by finger only, being careful not to
overtighten.
Crimp 4 mm insulated spade terminals onto the ends of the wires and push into the binding post assembly
from above (Ch. 1 & 3) or below (Ch. 2 & 4). The hole in the post is ignored. Hand tighten plastic turrets, being
careful not to overtighten.
8.2. Analog Inputs
8.2.1. Analog Input XLR Connections
2
Four electronically balanced analog inputs are provided via latching XLR3F connectors.
INPUT 1
INPUT 2
INPUT 3
ANALOG WITH ISO-FLOAT
INPUT 4
TM
PIN 1: SCRN 2: POS 3: NEG
Figure 8.8: Analog Input XLR Connections
8.2.2. Analog & AES3 XLR Wiring and Pin Out
All XLR connections are wired to IEC268 as shown in Figure 8.9.
Figure 8.9: IEC268 XLR Wiring and Pin Out
Pin 1: Ground / Shield
Pin 2: Hot (+)
Pin 3: Cold (-)
60
PLM+ SERIES Operation Manual rev 1.0.0
8. Back Panel Interface
8.2.3. Unbalanced Operation
Balanced connections are recommended where possible. However, if it is necessary to drive the device from
equipment with an unbalanced output, wire the inputs as shown in Figure 8.10.
2
HOT
HOT
COLD
COLD
SCRN
Unbalanced Output
(Typically phono)
1
3
SCRN
Balanced Input
(XLR)
Figure 8.10: Balanced to Unbalanced Analog Wiring and Pin Out
The method shown in Figure 8.10 uses twin-and-screen (balanced) cable and standard XLR pin connections at the
PLM+ Series device end, with the cold wire and the cable screen connected to the signal ground of the equipment
at the source end.
This usually provides better noise and hum rejection than the more common method of joining pins 1 and 3
together in the XLR. However, if only a single-core (unbalanced) cable is available, the method shown in
Figure 8.15 may be used.
2
HOT
1
HOT
SCRN
SCRN
Unbalanced Output
(Typically phono)
Balanced Input
(XLR)
3
Figure 8.11: Unbalanced Analog Wiring and Pin Out
8.2.4. Iso-Float Electronic Balancing
The analog input electronic balancing circuits use the Lake Iso-Float system.
The Iso-Float technology combines the benefits of transformer-coupled isolation with the advantages of clean,
direct-coupled inputs. The audio converters are galvanically isolated, and not connected to the main ground. Highquality transformers and opto-isolators create a barrier between the device and possible grounding aberrations
from the outside electrical environment.
Iso-Float settings are adjustable via the front panel menu or the Lake Controller software.
PLM+ SERIES Operation Manual rev 1.0.0
61
8. Back Panel Interface
8.3. AES3 Digital I/O
8.3.1. AES3 XLR Connector
3
AES3 digital audio input is via two XLR3F connectors. Connectors are provided for Inputs 1 & 2 and Inputs 3 & 4.
Wiring of this connector follows the same standard as for analog XLR connections as shown section 8.2.2.
The AES3 signal format carries two channels of audio and associated data on a single cable/connector. Selection
of input channels is performed within the digital processing section of the PLM+ and is controlled from the menu
system. Please refer to section 7.11.3.1 for further details.
INPUT 1-2
INPUT 3-4
AES/EBU
Figure 8.12: AES Inputs
8.4. RJ45 etherCON Network Connections
Two RJ45 etherCON style network connections are provided as shown in Figure 8.13.
1Gbps PRIM
ACT
LINK
1Gbps SEC
ACT
LINK
SWITCHED 100/1000 Base-TX
Figure 8.13: etherCON Network Connectors
The switched 100/1000 Base-T network connections auto-sense whether standard or crossover Cat-5e cables
are in use. The green ACT LED illuminates (flashes) to show network activity, and when a 100 Mbps connection is
present; the orange LED illuminates (static) to indicate a 1000 Mbps connection.
Pre-made cables with moulded RJ45 plugs are recommended. If it is necessary to make up custom Cat-5e
network cables, use pinout described in Table 8.14.
62
PLM+ SERIES Operation Manual rev 1.0.0
8. Back Panel Interface
Pin No.
Color
1
Brown
2
Brown + White
3
Green
4
Blue + White
5
Blue
6
Green + White
7
Orange
8
Orange + White
Table 8.14: RJ45 Wiring & Pin Out Description
Figure 8.15: RJ45 Wiring & Pin Out Diagram
When the device is connected to an active network, the yellow LINK LED illuminates above the connector in use.
Data activity on the network is indicated by illumination of the green ACT LED. It is normal for the ACT LED to
flicker either sporadically or continuously.
8.4.1. Primary Network Connection
4
The Primary Network connection is used for Lake Controller connectivity and Dante digital audio. Please refer to
section 4.2 for additional information.
8.4.2. Secondary Network Connection
5
The Secondary Network connection may be used for a redundant Dante digital audio network. Please refer to
section 4.2 for additional information.
PLM+ SERIES Operation Manual rev 1.0.0
63
8. Back Panel Interface
8.5. Power Inlet
8.5.1 Power Connector
7
A Neutrik NAC3 Series powerCON connector rated at 32 A is fitted to the rear of the PLM+ for AC mains input.
The power cable (AC cord) supplied with the PLM+ has the mating connector ready-fitted, but may require a mains
(AC) plug specific to your country to be fitted to the other end. The wiring an pinout details are shown in Table 8.2.
powerCON pin
230 V Version
115 V Version
L
Brown
Black
N
Blue
White
Green/Yellow
Green
Table 8.16: powerCON Connector Wiring and Pinout
64
PLM+ SERIES Operation Manual rev 1.0.0
9. Appendix
9. Appendix
9.1. Faults and Warnings Overview
Category/Type
Name
On screen text
Description
Action
Warning
Lake Controller offline
CTRL OFFLINE
Frame unable to find Lake controller
on the network
Check network cabling/
network if controller
expected on the network
Warning
AES clock slipping
CLOCK SLIPPING
Frame not able to lock to
incoming AES stream
Check AES sender and
clock configuration
Warning
Dante device name conflict
NAME CONFLICT
Two or more devices on the network
with the same Dante name
Review Dante
configuration
Warning
Dante module not detected
DANTE NEEDS
SERVICE
Lake cannot detect a functioning
Dante module
Restart device; if not
cleared it needs service
to operate Dante
Warning
Dante module with
incompatible firmware
DANTE FW INVALID
Dante module not loaded
with correct FW
Retry updating the firmware
with LakeUpdate
Fault
Audio Fault
AUDIO FAULT
Internal audio interface
not functioning
Restart device; if not
cleared it needs service
Fault
Sense fault DSP
SENS FLT:DSP
Voltage and current sensing on amplifier
output faulty. Audio continues but
protection might be compromised.
No load monitoring
Restart device; if not
cleared it needs service
Fault
A/D converter power
supply fault
A/D PSU FAULT
Voltage supply to the analog input
converters faulty
Restart device; if not
cleared it needs service for
analog input to work
Warning
Temperature warning
power supply
TEMP WARN:PSU
Power supply temperature
approaching critical levels
Improve cooling or reduce
output power to avoid
temperature becoming
critical
Warning
Temperature warning
DSP area
TEMP WARN:DSP
DSP area temperature approaching
critical levels
Improve cooling or reduce
output power to avoid
temperature becoming
critical
Warning
Power supply
Temperature Limit
PTL ACTIVE
Amplifier is reducing output power
to avoid power supply temp
fault protection
Improve cooling or reduce
output power to avoid
limiting
Warning
Amp channel
Temperature Limit
ATL ACTIVE
Amplifier channel is reducing output
power to avoid amplifier channel
temp fault protection
Improve cooling or reduce
output power to avoid
limiting
Fault
Temperature fault
power supply
TEMP FLT:PSU
Power supply temperature reached
internal protection limit
Automatically restarts
when cooled down
Fault
Temperature fault
DSP area
TEMP FLT:DSP
DSP area reached
critical temperature
Improve cooling or
reduce power
FRAME
TEMP
PLM+ SERIES Operation Manual rev 1.0.0
65
9. Appendix
Category/Type
Name
On screen text
Description
Action
Increase mains distribution
stiffness or reduce output
power to avoid limiting
PSU
Warning
Under Voltage Limit
UVL ACTIVE
The Under Voltage limiter is active as the
mains supply is approaching the lower
end of the device´s operational voltage.
Output power is decreased to ensure
mains distribution does not collapse
Warning
Power Average Limit
PAL ACTIVE
Amplifier is reducing output power due
to average power or mains current
draw is above safe operating levels
Reduce output power
to avoid limiting
Improve mains distribution
and update BEL
configuration or reduce
output power to avoid
limiting
Warning
Breaker Emulation Limit
BEL ACTIVE
Power supply is reducing mains current
draw to stay within BEL configured
nominal current and profile
Warning
Mains supply glitch
MAINS GLITCH
Mains glitch (missing cycles) was
detected on the mains inlet
Check mains distribution/
connection
Warning
Upgrade power
supply firmware
UPGRADE PSU
Power supply firmware version not
compatible with amplifier
Upgrade amplifier
firmware
Fault
Need service
NEED SERVICE:1-8
Power supply internal error
Restart device; if not
cleared it needs service
Fault
Mains voltage above
400 volt peak
MAINS>400 VPK
Power supply detects mains voltage
above 400 volt peak. Protective shut
down, auto restart attempt
Check mains distribution/
connection
Fault
Mains voltage above
270 V
MAINS>270 V
Power supply detects mains voltage
above operation voltage. Protective
shut down, auto restart attempt
Check mains distribution/
connection
Fault
Mains voltage below
65 V
Mains<65 V
Power supply detects mains voltage
below operation voltage. Protective
shut down, auto restart attempt
Check mains distribution/
connection
Fault
Power supply fault
PSU FAULT
Internal power supply fault
Check mains distribution/
connection. Restart
device; if not cleared
it needs service
Fault
Check mains
CHECK MAINS
Power supply detects unstable mains
supply. Protective shut down, auto
restart attempt
Check mains distribution/
connection
Fault
Power supply power protect
PSU POWER PROT
Too high output power for too low mains
supply voltage. Protective shut down,
auto restart attempt
Improve mains supply
voltage or reduce
output power
Warning
Speaker short
SPKR SHORT
Both LoadPilot tones below thresholds
Check load or calibration
Warning
Speaker damaged
SPKR DAMAGED
One LoadPilot tone is above
or below threshold
Check load or calibration
Warning
Under speaker count
UNDER SPKR CNT
Both LoadPilot tones above thresholds
or LoadSmart detected fewer
speakers than expected
Check load and
cabling alibration
LOAD
66
PLM+ SERIES Operation Manual rev 1.0.0
9. Appendix
Category/Type
Name
On screen text
Description
Action
Warning
More speakers
OVR SPKR COUNT
LoadSmart detected more speakers
than expected
Check load and
cabling or fingerprint
Warning
Uncertain about load
UNCERTAIN LOAD
LoadSmart uncertain about load
Check load and
cabling or fingerprint
Warning
Load not verified
LOAD NOT VER
LoadSmart not verified
Perform LoadSmart
verification
Fault
No load
NO LOAD
At least one LoadPilot tone above
measurable area or significantly
above thresholds
Check load or calibration
Fault
Wrong load
WRONG LOAD
LoadSmart detected impedance
response output model
Check load and
cabling or fingerprint
Fault
Short circuit
SHORT CIRCUIT
LoadPilot or full frequency analysis
below short threshold or hardware
short protection
Check load and cabling
Warning
Temp warning amplifier
channel
TEMP WARN
Amplifier channel is approaching
critical temperature
Improve cooling or reduce
output power to avoid
temperature becoming
critical
Fault
Temp Fault amplifier channel
TEMP FAULT
Amplifier channel has reached
internal protection limit
Automatically unmutes
when cooled down
Fault
Service channel
SERVICE CH.
Amplifier channel is damaged
Restart device; if not
cleared it needs service
Fault
Very high frequency fault
VHF FAULT
Amplifier channel protection
Check input signal
Clip
Current average limiter
CAL ACTIVE
Average current on amplifier
above safe operating level
Reduce output power
to avoid limiting
Clip
Current clip
CURRENT CLIP
Amplifier channel reached
current limit
Reduce output power
to avoid limiting
Clip
Voltage clip
VOLTAGE CLIP
Amplifier reached voltage limit
Reduce output power
to avoid limiting
Clip
Module clip
MOD. CLIP
Module output signal clipped
Review gain structure.
Module gain vs AmpGain
Fault
No input source
NO INPUT
Input router has no valid
input source
Review input router
settings/connections
Clip
Analog/AES input clip
INPUT CLIP
The signal on the analog/AES input
is above inputs capability
Lower the signal on the
feed to the amplifier
AMP
SIGNAL
Table 9.1: Warning, Fault and Mute Indications (alphabetical by LCD Text / Event Log Text)
PLM+ SERIES Operation Manual rev 1.0.0
67
9. Appendix
9.2. Maintenance
During normal operation this devices provides trouble-free service. If the LCD or front panel display requires
cleaning, use a soft cloth only; do not use solvent cleaners. The dust filters on both sides of the front panel, behind
the grilles, should occasionally be removed and cleaned to ensure maximum airflow through the device.
Disconnect the unit from mains power prior to removing dust the filter, and ensure the dust filter is replace prior to
turning the unit back on.
Do not use sharp or metal objects to remove the dust filter, and be careful that the implement used to remove the
filter does not enter the device.
In extreme cases it may be necessary to clean the inside of the device. This procedure should only be carried
out by qualified service personnel. This may be necessary if the device has had prolonged operation in an
extreme environment such as one where cracked oil smoke machines are in use. If the device is used in extreme
conditions, it is recommended to have it serviced every three years as a preventative measure.
9.3. Factory Default Settings
9.3.1. Module Defaults
Module Type:
Mod Input Mute:
Mod Output Mutes:
Gain:
Delay:
Polarity:
MaxRMS:
MaxPeak:
4 x CL1-Way
On
Off
0 dB (unity)
0 ms
Positive (In phase)
20 dB
21 dB
Amp Gain:
35 dB
ISVPL:
194 V
Input & Output EQ:
Flat
68
PLM+ SERIES Operation Manual rev 1.0.0
9. Appendix
9.3.2. Input and Router Defaults
Autoselect:
Input sensitivity:
Dante:
AES3:
Iso-Float:
On
+26 dBu
Disabled
Terminated
Enabled
Router 1:
Priority 1 = Dante Receiver (Ch.1)
Priority 2 = Dante Receiver (Ch.5)
Priority 3 = AES1 (Ch.1)
Priority 4 = Analog 1
Router 2:
Priority 1 = Dante Receiver (Ch.2)
Priority 2 = Dante Receiver (Ch.6)
Priority 3 = AES1 (Ch.2)
Priority 4 = Analog 2
Router 3:
Priority 1 = Dante Receiver (Ch.3)
Priority 2 = Dante Receiver (Ch.7)
Priority 3 = AES1 (Ch.3)
Priority 4 = Analog 3
Router 4:
Priority 1 = Dante Receiver (Ch.4)
Priority 2 = Dante Receiver (Ch.8)
Priority 3 = AES1 (Ch.4)
Priority 4 = Analog 4
9.3.3. Amplifier and Device Defaults
Attenuation:
Polarity:
Mutes:
Load Model:
Breaker Emulation Limiter:
IP Configuration:
Dual Redundancy:
Dante Slave Only:
0 dB
Positive (In phase)
Unmuted
No Load Model
PLM 20K44 - 32A
PLM 12K44 - 25A
Auto Zero Conf. (Auto IP)
Disabled
Enabled
PLM+ SERIES Operation Manual rev 1.0.0
69
9. Appendix
9.4. Current Draw and Thermal Dissipation Specifications
The tables in this section provide measured current consumption and calculated heat dissipation for five
different operating conditions for each PLM+ Series device.
1.
2.
3.
4.
5.
Standby Mode
Power On (Idle - No Signal)
Power On (Normal Operation - Pink Noise 1/8 of Rated Power)
Power On (Heavy Duty Operation - Pink Noise Max Power) - Not available for PLM 20000Q
Power On (Pilot Tone Operation - 20 kHz Sine Wave)
PLM 12K44
Level
Load
Rated power
per channel
Line Current
Power
Factor
(A)
(%)
Measured Power (W)
In
Thermal Dissipation
Out
Dissipated
BTU/hr
kCal/hr
Standby
0
0
0
0
Power on, Idling
0
0
0
0
1059.18
474.795
584.385
1994
502.817
790.704
Mains Voltage 100 VAC, 30 A
16 Ω / Ch.
950
10.828
98.8
8 Ω / Ch.
1900
19.1845
98.9
1868.46
949.486
918.974
3135.67
4 Ω / Ch.
3000
24.607
98.8
2389.08
1200.19
1188.894
4056.68
1022.95
2.67 Ω / Ch.
3000
25.748
98.9
2550.96
1151.38
1399.581
4775.57
1204.23
2 Ω / Ch.
3000
25.754
98.9
2576.04
1112.96
1463.076
4992.22
1258.86
97.5
231.36
0.05
231.355
789.416
199.063
Standby
0
0
0
0
Power on, Idling
0
0
0
0
559.725
1909.86
481.599
701.65
Pink Pseudo
Noise
Sine 20 kHz
8 Ω / Ch.
2.403
Mains Voltage 120 VAC, 30 A
16 Ω / Ch.
950
8.802
99
1034.52
474.795
8 Ω / Ch.
1900
15.067
99
1764.96
949.486
815.474
2782.51
4 Ω / Ch.
3000
24.034
99.2
2816.64
1501.7
1314.938
4486.76
1131.4
2.67 Ω / Ch.
3000
24.522
99.1
2893.56
1437.43
1456.128
4968.51
1252.88
2 Ω / Ch.
3000
25.102
99.2
2980.02
1361.2
1618.821
5523.65
1392.87
97.4
226.44
0.005
226.435
772.628
194.829
Standby
0
0
0
0
Power on, Idling
0
0
0
0
1001.16
475.012
526.148
1795.29
452.708
702.425
Pink Pseudo
Noise
Sine 20 kHz
8 Ω / Ch.
1.964
Mains Voltage 208 VAC, 17.3 A
16 Ω / Ch.
950
4.947
98.6
8 Ω / Ch.
1900
8.717
99.2
1765.86
949.486
816.374
2785.58
4 Ω / Ch.
3000
13.268
99.2
2686.62
1500.94
1185.680
4045.71
1020.18
2.67 Ω / Ch.
3000
13.987
99.1
2846.52
1500.29
1346.231
4593.53
1158.33
2 Ω / Ch.
3000
14.780
99.2
3046.2
1499.98
1546.220
5275.92
1330.4
92.8
221.1
0.005
221.095
754.407
190.235
Standby
0
0
0
0
Power on, Idling
0
0
0
0
528.525
1803.4
454.754
Pink Pseudo
Noise
Sine 20 kHz
8 Ω / Ch.
1.171
Mains Voltage 230 VAC, 16 A
16 Ω / Ch.
Pink Pseudo
Noise
Sine 20 kHz
950
4.654
98.5
1003.32
474.795
8 Ω / Ch.
1900
7.729
99
1733.76
949.486
784.274
2676.05
674.805
4 Ω / Ch.
3000
11.407
99.1
2562
1500.94
1061.060
3620.49
912.958
2.67 Ω / Ch.
3000
12.816
99.2
2873.22
1499.37
1373.852
4687.78
1182.09
2 Ω / Ch.
3000
13.091
99.1
2993.04
1499.98
1493.060
5094.53
1284.66
1.049
90.2
214.02
0.005
214.015
730.25
184.143
8 Ω / Ch.
Table 9.2: PLM12K44 Current Draw and Dissipation Specifications
70
PLM+ SERIES Operation Manual rev 1.0.0
9. Appendix
PLM 20K44
Level
Load
Rated power
per channel
Line Current
Power
Factor
(A)
(%)
Measured Power (W)
In
Out
Thermal Dissipation
Dissipated
BTU/hr
kCal/hr
Mains Voltage 100 VAC, 30 A
Standby
0.33
51.8
17
0
17
58.006
14.627
Power on, Idling
2.43
96.8
235
0
235
801.853
202.199
Pink Pseudo
Noise
Sine 20 kHz
16 Ω / Ch.
1175
12.1268
98.6
1191.6
587.596
604.004
2060.946
519.697
8 Ω / Ch.
2350
22.349
98.9
2197.714
1173.927
1023.788
3493.309
880.888
4 Ω / Ch.
4400
29.189
98.9
2852.76
1477.842
1374.918
4691.413
1183.007
2.67 Ω / Ch.
5000
29.250
98.9
2862.12
1399.309
1462.811
4991.32
1258.633
2 Ω / Ch.
29.134
98.8
2826.48
1354.769
1471.711
5021.688
1266.291
8 Ω / Ch.
2.490
96.9
236.425
0.005
236.420
806.698
203.420
Mains Voltage 120 VAC, 30 A
Standby
Power on, Idling
Pink Pseudo
Noise
Sine 20 kHz
0.3
47.5
17
0
17
58.006
14.627
2
96.7
227
0
227
774.556
195.315
16 Ω / Ch.
1175
11.974
98.6
1180.38
587.596
592.784
2022.66
510.043
8 Ω / Ch.
2350
18.363
99
2144
1173.93
970.073
3310.03
834.671
4 Ω / Ch.
4400
30.787
99.2
3547.8
1949.5
1598.295
5453.61
1375.21
2.67 Ω / Ch.
5000
29.548
98.9
3438.6
1751.75
1686.854
5755.78
1451.4
2 Ω / Ch.
4400
29.884
99
3495
1664.66
1830.337
6245.37
1574.86
96.6
231.649
0.005
231.644
790.402
199.311
8 Ω / Ch.
2.034
Mains Voltage 208 VAC, 17.3 A
Standby
26.9
17.5
0
17.5
59.713
15.057
Power on, Idling
92.2
222
0
222
757.495
191.013
Pink Pseudo
Noise
Sine 20 kHz
16 Ω / Ch.
1175
5.722
98.5
1151.16
587.596
563.564
1922.96
484.902
8 Ω / Ch.
2350
10.169
98.8
2054.61
1173.93
880.679
3005
757.754
4 Ω / Ch.
16.208
99
3285.6
1947.77
1337.828
4563.86
1151.09
2.67 Ω / Ch.
15.598
99
3171
1751.75
1419.254
4842.7
1221.16
2 Ω / Ch.
15.989
99
3253.2
1664.66
1588.537
5420.31
1366.81
8 Ω / Ch.
1.208
92.1
228.611
0.005
228.606
780.035
196.697
Mains Voltage 230 VAC, 16 A
23.3
18
0
18
61.419
15.488
1.2
91.5
222
0
222
757.495
191.013
Standby
Power on, Idling
Pink Pseudo
Noise
Sine 20 kHz
16 Ω / Ch.
1175
5.106
98.2
1133.7
587.596
546.104
1863.38
469.879
8 Ω / Ch.
2350
9.179
98.9
2052.85
1173.93
878.924
2999.01
756.244
4 Ω / Ch.
15.915
3528.6
2108.58
1420.016
4845.29
1221.81
2.67 Ω / Ch.
16.232
99
3616.2
1964.63
1651.569
5635.39
1421.04
2 Ω / Ch.
16.080
99
3595.2
1865.44
1729.762
5902.19
1488.32
8 Ω / Ch.
1.117
90.3
227.689
0.005
227.684
776.891
195.904
Table 9.3: PLM20K44 Current Draw and Dissipation Specifications
PLM+ SERIES Operation Manual rev 1.0.0
71
9. Appendix
9.5. Glossary of Terms, Acronyms and Abbreviations
The explanations given in Table 9.4 below are based on the specific use of each term in this manual. The
definitions are not intended to be exhaustive and many of these terms have wider meanings.
Term
72
Description
Floating
An analog balanced input or output is said to be floating when full electrical isolation exists between that input or output and the equipment connected to it.
Transformer-coupled inputs and outputs are inherently floating. Electronically balanced inputs and outputs can never be truly floating, though better designs –
such as that found in the PLM+ - do mimic the characteristics of transformer-coupled designs to a high degree.
Frame
Lake terminology for a physical unit containing a Lake processing system, i.e. a single LM 26, PLM, PLM+ or legacy Lake Processor.
Frame ID
An electronic identification ‘label’ which can be given to each Frame in an amplification system. Naming Frames in a large system is desirable as it simplifies
identification in the Lake Controller.
Frame Preset
Frame Presets are a class of Presets within the Lake processing system. Up to 100 can be stored in the hardware device, and each holds the complete
configuration of all Modules and the Modules’ internal settings.
Gigabit Ethernet
Describes the speed of Ethernet data transfer for devices that transmit Ethernet frames at a rate of a gigabit per second, as defined by the
IEEE 802.3-2008 standard.
Hub
A type of network interface device with multiple Ethernet ports. Data arriving at any port is sent to all others. Hubs have been largely replaced by Switches.
In-Rush Current
When power is applied to a piece of electronic equipment, the initial current taken by the PSU can be very high as the various capacitors in the circuitry charge up;
this is called the in-rush current. In the case of power amplifiers, which contain numerous very large capacitors, the in-rush current can be enough to blow mains
breakers. The PLM+’s PSU contains circuitry to control the in-rush current to prevent this.
Input Level
The amplitude of an audio signal at the point where it is applied to the input of the device, or at the input of an intermediate stage within it. An analog input signal
level will be expressed in dBu’s, while a digital input signal level in dBfS (dBs below digital clip level; fS = full-scale)
IP Address
Every item of equipment connected to an Ethernet network has a unique address called the IP address, so that data gets to the correct place. IP addresses are
written as four groups of three decimal numbers between 0 and 255. In a system consisting of Lake Processors and a Lake Controller they are assigned and
detected automatically.
IP Subnet Mask
IP subnet masks are required in all IP networks. The subnet is determined by the size and type of network being used. For small networks (less than 254 addresses)
a subnet mask of 255.255.255.0 can be used. (A Class C network).
Iso-Float
Iso-Float is Lake’s proprietary method of electronic balancing, which provides a particularly high level of isolation and immunity from ground loops.
ISVPL
ISVPL is an abbreviation for Inter-Sample Voltage Peak Limiter, a proprietary Lab.gruppen technique for ensuring that voltage at the output terminals of a PLM+
does not exceed a pre-determined level. Eight ISVPL profiles provide the ability to configure for low distortion or high SPL specific to certain frequency ranges,
or for universal use.
Lake Controller
The Lake Controller is the software application used to control LM 26 Processors, PLM+ Series and other Lake devices. This software application provides
additional functionality and allows various grouping functions for simultaneous control of multiple Lake Processing enabled devices.
Latency
The small but finite delay incurred by audio signals when they are transformed into the digital domain, processed digitally and then converted back into analog
signals. In the Lake system, latency is assured to be constant.
Legacy Lake Device
This term refers to older Lake audio equipment which may form part of an audio system (i.e. Lake Contour Pro 26, Lake Mesa Quad EQ and the Dolby Lake
Processor). The Lake Controller has the capability to control all Lake legacy products.
LimiterMax
LimiterMax is the name given to Lake’s proprietary package of dynamics control which forms part of the Lake Processing system.
Line Driver
An analog audio amplifier, usually with zero gain, having very low output impedance and high drive capability. They are used for transmitting balanced analog audio
over very long cables.
Linear Phase Crossover
See FIR Filters.
Load Library
The Lake Controller includes LoadLibrary, a set of Module files specific to the PLM+ Series. These Modules include a database of the electrical characteristics of
various popular loudspeakers in addition to the standard Module data. The PLM+ uses the load data when verifying and monitoring amplifier loads.
See Fingerprint, LoadSmart and SpeakerSafe.
Load, equal/unequal
The PLM+ draws different current levels from the AC supply, and thus has different power ratings according to whether all channels of the amplifier are driving into
the same load impedance, or if there are different impedances on different channels.
LoadSmart
LoadSmart is a load verification procedure within the PLM+ which allows the operator to confirm that each PLM+ output has the correct quantity and type of
speaker connected to it. It is intended to be used pre-performance prior to running SpeakerSafe.
Loop-Thru
This term refers to the Link connectors provided on the PLM+ for daisy-chaining further amplifiers or other equipment. The use of these to connect further devices
is termed a loop-thru.
MAC Address
In addition to an IP address, every device on an Ethernet network has a MAC address. This address is fixed at the time of manufacture, and is effectively the
permanent identifier of the physical unit. MAC stands for Media Access Control
MaxPeak
Lake’s LimiterMax provides independent dynamics control over signal peaks (MaxPeak) and the average signal level (MaxRMS).
Module
The term used in the Lake Controller to describe the virtual set of signal processing that routes an audio input to the various frequency weighted outputs of a
crossover. The processing system within the device allows for two Modules, each of which may be assigned a range of crossover configurations, input sources, etc.
Module Preset
A class of Preset within the Lake processing system. A Module Preset (Module file) contains all the configuration data and settings for one Module, and is saved in
the Lake Controller software, not in the hardware device.
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9. Appendix
Term
Description
Offline
A device on an Ethernet network which is not communicating with the rest of the network either due to a fault or intentionally is said to be offline.
Online
A device on an Ethernet network which is fully operational and communicating with the rest of the network is said to be online.
PAL
An abbreviation for Power Average Limiter, PAL is proprietary Lab.gruppen circuit which provides additional amplifier protection. The PAL ensures that the power
drawn by the PSU from the AC mains does not exceed the mains breaker ratings.
Parallel
Two or more e.g. inputs which are wired together so that all inputs are connected to the same source are said to be paralleled. Signal levels will be reduced if too
many inputs are paralleled; in the case of AES3, this may result in a complete loss of audio.
Parameter
Any control function which can be adjusted by the user to one of several different values is termed a parameter. For example, input level, gain, delay, and limiter
threshold are all parameters.
Pass-Through Cable
See Straight network cable.
PFC
Power Factor Correction. PFC reduces current peaks on the lines and reduces the requirements placed on the mains distribution system.
Ping
Ping is a term coined by the IT industry to the procedure of sending a command over a network to a particular Ethernet device asking it to confirm its identity and
possibly reply with additional information. Thus an Lake device on the network can be pinged from the Lake Controller; on receipt of the ‘ping’, the hi-intensity
white LED on the front panel illuminates. Reverse pinging is also possible, whereby the ping is instigated from Lake hardware device and a visual identification of
the processor registers in the Lake Controller software.
Preset
A complete frame configuration that is stored in the device hardware.
Primary Ethernet Port
The Primary Ethernet port on the is the means of connecting the device to a network. See also Secondary Ethernet Port.
PSU
Abbreviation of Power Supply Unit. The PSU in any item of electronic equipment converts the AC mains into a set of internal DC voltages which run the electronic
assemblies themselves.
RJ45
RJ45 connections are the industry-standard connectors for Ethernet ports.
Router
As far as networks of the type discussed in this manual are concerned, see Switch.
Secondary Ethernet Port
The Secondary Ethernet port can be used either as a daisy-chain output, repeating the network connection at the Primary port, or for the connection of a separate
second network for full redundancy.
Short Circuit Protection
A Lab.gruppen proprietary protective circuit designed to mute a channel when a short circuit is detected at its output terminals to prevent damage to the device.
SpeakerSafe
Once activated, SpeakerSafe constantly monitors the voltage and current at the PLM+’s outputs. Using Fingerprint data, the software then calculates parameters
such as voice coil and magnet temperatures, providing the operator with real-time performance monitoring. See LoadLibrary.
speakON
An industrial-quality loudspeaker connector manufactured by Neutrik. 4-pole (2 speakers) and 8-pole (4 speakers) versions are fitted to various versions of the PLM+.
Star Topology
A network topology which uses a network switch to connect to individual Lake devices. Each device connects to one port on the switch with its own cable, thus the
network looks like a star when drawn as a diagram with the switch at the centre.
Straight Network Cable
A Cat-5/6 network cable with full pin-to-pin connections is called a straight network cable. Lake devices can connect to a network using either straight or crossed
network cables.
Subsystem
It is possible when working with large networked systems to store selected components of the system into a Subsystem. This is useful if working on a tour that
encompasses both large and mid-sized venues. The same core Lake Controller data can then be used for a reduced number of Lake devices.
Super Module
A Super Module is a virtual construct that can be realized within the Lake Controller, allowing a set of Modules in different Frames to be treated as a single Module.
Switch (Ethernet)
An Ethernet switch allows several Ethernet devices to be connected to a network using a star topology. More intelligent than the earlier hubs which they now largely
replace, they route packets of data only to the units for which they are intended, and also perform other system housekeeping and control functions.
System Preset
A class of Preset within the Lake Processing system, System Presets allow Module or Frame configurations and settings to be stored for the entire network of
LM 26 Processors, PLM Series, PLM+ Series and other legacy Lake devices.
Tablet PC
A compact PC which uses a touchscreen instead of keyboard and mouse. The Lake Controller has been optimized for use on Tablet PCs.
Termination
AES3 digital audio interconnections must be correctly terminated for reliable operation. The 110 ohm terminations must be set ‘on’ at the beginning and end of a
set of daisy-chained digital audio equipment, and ‘off’ at any intermediate ones.
Topology
A mathematical word for “arrangement” or “configuration”. The topology of a network is a means of visualizing the overall configuration of the network.
Universal Power Supply
A power supply that operates in all countries, without the need for manual adjustment, as long as the voltage falls within the specified range for the device.
VHF Protection
VHF protection is another amplifier safety circuit developed by Lab.gruppen. The presence of continuous HF audio can easily damage loudspeakers, so the
protection circuit monitors the output this, muting the power output channel if necessary
V peak
Indicates the peak voltage of an audio signal. For a sinusoidal signal, the peak voltage = 1.414 x the RMS voltage, Vrms. Not to be confused with peak-to-peak
voltage (written V pk-pk), which = V peak x 2.
Vrms
The RMS voltage of a signal. See RMS.
Wireless Access Point
A device used to connect a computer to an Ethernet network without cables; a radio transmitter/receiver for data.
Wireless Network
An Ethernet network where some or all cabled connections are replaced by wireless links.
Table 9.4: Glossary of Terms, Acronyms and Abbreviations
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10. Application Guide
10. Application Guide
This chapter describes the practical application and use of PLM+ Series devices.
10.1. Rack I/O Panels
For fast and simple system connection, pre-wired racks using connection panels can be used. With an I/O
connector panel fitted to the front of the rack, all audio, loudspeaker, network and power cables can be plugged in
at one position, without requiring rear panel access.
10.2. Power Distribution
For professional applications it is recommended that the sum of the available mains power is above 3000 W per
PLM+ (e.g. 230 V x 16 A, 120 V x 32 A). As PLM+ devices are equipped with BEL, the current draw of the device
can be configured to perfectly match the power distribution.
Safety approved equipment is not required to have a mains breaker, as long as this does not pose any fire hazard
under fault conditions, as is the case with the PLM+. Please see the following examples suggesting power
distribution methods across multiple PLM+ devices. All of the examples given will work, although the first examples
for both 230 V and 115 V operation have a slight advantage due to their “power sharing” ability.
10.2.1. Six PLM+ Series Devices with 230-240 V Mains Supply
If the mains supply is 230 V and the system requirement is six PLM+s, then the mains capacity would need to be
able to provide 3 x 32 A. There are two methods of achieving this:
1. Three racks, each with two PLM+s and a 32 A single-phase mains supply. The 32 A capacity is shared
between the two PLM+s within the rack. This is beneficial as the two PLM+s don’t have to draw the same current.
The only limitation is that in combination they don’t draw over 32 A.
2. Three racks, each with two PLM+s and a 16 A three-phase mains supply. This requires central power
distribution to be configured as two 3 x 16 A circuits from 3 x 32 A. One phase is used for each PLM+ within the
rack. This has the benefit that each PLM+ has its own breaker, but they all have to operate within the same limit
of 16 A; therefore, more care must be taken to ensure that no breaker blows if different loads are used. Note: The
230 V version of the PLM+ is equipped with a slow-blow 30 A ceramic breaker.
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10.2.2. Six PLM+ Series Devices with 100-120 V Mains Supply
If the mains supply is 115 V and the system requirement is 6 PLM+s, then the mains capacity would need to be
able to supply two 3 x 30 A circuits. There are two methods of achieving this:
1. Two racks, each with three 230 V version PLM+s and a 30 A three-phase mains supply. In the rack the PLM+s
are connected between the phases, i.e. one between phase 1 and 2, one between phase 2 and 3 and the last
between phase 3 and 1. Each 30 A mains breaker is shared between two PLM+s and the mains current is to
some extent canceled. This has the benefit that the three PLM+s don’t have to draw the same current; one can be
allowed to draw a little more than the other two. The only limitation is that in combination they don’t draw over 30 A.
2. Two racks, each with three 115 V version PLM+s and a 30 A three-phase mains supply. One phase is used for
each PLM+ within the rack. This has the benefit that each PLM+ has its own breaker, but they all have to operate
within the same limit of 30 A; therefore, more care must be taken to ensure that no breaker blows if different loads
are used.
10.3. Gain Structure
The PLM+ Series architecture provides gain adjustments at various points in the signal path and therefore enabling
various places for muting and level adjustment. Each mute or gain adjustment point serves a different purpose.
The signal flow diagrams in chapter 6 provide a useful reference for the signal path. The following sections describe
the various adjustment points, all of which are available via the Lake Controller software.
10.3.1. Input Headroom (Analog Inputs Only)
Input Headroom should be set to 12 dBu if the source can be limited to 12 dBu; otherwise it should be set to
26 dBu. This setting does not affect the other gain stages, or the overall noise floor; it allows control of the
appropriate headroom at the input stage only.
To adjust, navigate to I/O CONFIG > INPUT CONFIGURATION in the Lake Controller. Please refer to the Lake
Controller Operation Manual for further details.
10.3.2. Input Mixer
Input Mixer gains can remain at 0.00 dB for most configurations; if only one input channel is used per Module, the
other can be set to -INF.
To adjust, navigate to I/O CONFIG and tap the Input Mixer blocks for the Module in the Lake Controller. Please
refer to the Lake Controller Operation Manual for further details.
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10. Application Guide
10.3.3. Module Input Gain
Input Gain is used to adjust the level between different speaker cabinets in the system. This gain can remain at
0.00 dB unless a lower level is required for the cabinet/s driven by this Module.
To adjust, navigate to MODULES > EQ/LEVELS > LEVELS in the Lake Controller. Please refer to the Lake
Controller Operation Manual for further details.
10.3.4. Module Output Gain
Factory and User Gain are provided for each Module output. These two stages provide a level of security and
control for the system designer (Factory) and a further level of adjustment for the user (User), both of which
combine to balance the level between frequency bands in a multi-way crossover (Contour configuration) or the
Module output level (Mesa configuration).
1. Factory Gain is set by the system designer and can be hidden within the Module file. The Factory Gain
parameter is only accessible when the Module is unlocked and the Lake Controller is in Designer Mode. Adjust via
MODULES > LEVELS > METER OPTIONS > ADJUST FACTORY.
2. User Gain is editable by a user unless the system designer has locked away the parameter; adjust via
MODULES > LEVELS.
Generally, output gain values are configured within a Module / loudspeaker preset file and should not need to be
adjusted further.
10.3.5. Attenuator
An attenuator gain adjustment is provided for each power output channel in the PLM+. This control replaces the
traditional volume control found on conventional amplifiers and should typically be left at 0 dB during use.
To adjust, navigate to I/O CONFIG > EVENTS & CONTROL > STATUS in the Lake Controller. Please refer to the
Lake Controller Operation Manual for further details.
10.3.6. Amp Gain
The Amp Gain corresponds to the gain adjustment in a conventional separate loudspeaker processor and amplifier
system. When using a pre-defined Module loudspeaker preset file, the Amp Gain settings will normally remain as
defined in the file. The limiter and output gain settings of the Module were configured with this gain setting and will
not be automatically compensated if changes are made. This configuration scheme, though unusual, allows for
compatibility with other Lake products, assuming the amplifier gain is set as specified in the speaker preset.
When creating a loudspeaker preset Module file, adjust by navigating to I/O CONFIG > EVENTS & CONTROL >
CONTROL in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.
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10.4. Gain / Level Optimization
10.4.1. Maximize Volume Capability
To maximize the volume capability of the device, ensure there is sufficient headroom in the signal path to avoid
clipping before the limiters engage. It must be possible to achieve enough gain through the device to engage
the limiters and realize a high average SPL. As an optimal setting, allow for a headroom of 10 dB or more for all
channels; the simplest way to accomplish this is to increase the Module input gain.
10.4.2. Minimize Noise
To help provide the best volume to noise ratio, use an AES or Dante digital input signal wherever possible. If using
analog inputs, ensure that unused or unnecessarily high headroom is not introduced at the input to the device. If
full or high average power is not required, the Module input gain may be reduced.
10.4.3. Gain Optimization Examples
This section provides examples on performance effects resulting from changes to the PLM+ gain structure
10.4.3.1. Digital Input Gain Structure Examples
Figure 10.2 illustrates the recommended configuration of the PLM+ when using an AES or Dante digital input.
•
•
•
•
Input Clip: 0 dBFS
Amp Gain: 35 dB
SNR: 114.2 dB
Absolute Noise Floor: -71.3 dBu
100,0
50,0
dB/dBu
0,0
Clip
-50,0
Nominal
-100,0
-150,0
Noise
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
-200,0
-250,0
Table 10.2: Digital Input: Low Noise with Good Headroom (High Input / High SPL)
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10. Application Guide
Figure 10.3 illustrates how to achieve the lowest possible output noise, although this is not a recommended
configuration.
•
•
•
•
Input Clip: 0 dBFS
Amp Gain: 22 dB
SNR: 114.8 dB
Absolute Noise Floor: -71.9 dBu
100,0
50,0
dB/dBu
0,0
Clip
-50,0
Nominal
-100,0
-150,0
Noise
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
-200,0
-250,0
Table 10.3: Digital Input Optimized for Minimum Noise - Not Recommended
The improvement in noise performance (at the cost of losing headroom and compression features) is only 0.6 dB;
it is therefore not recommended to optimize performance in this manner.
10.4.3.2. Analog Input Gain Structure Examples
Figure 10.4 illustrates how to minimize absolute noise while limiting the available SPL. Input Clip: 12 dBu
•
•
•
•
Amp Gain: 22 dB
SNR: 105.5 dB
Absolute Noise Floor: -71.5 dBu
SPL is limited to -8.9 dB relative to clip in this minimum absolute noise level example
60,0
40,0
20,0
dB/dBu
0,0
-20,0
Clip
-40,0
Nominal
-60,0
Noise
-80,0
-100,0
-120,0
-140,0
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Table 10.4: Analog: Low Noise with Limited Output (Low Input / Low SPL)
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10. Application Guide
Figure 10.5 illustrates how to minimize absolute noise while achieving full power. In this illustration it can be seen
that there is no available headroom.
•
•
•
•
Input Clip: 12 dBu
Amp Gain: 30.9 dB
SNR: 111.3 dB
Absolute Noise Floor: -68.4 dBu
80,0
60,0
40,0
dB/dBu
20,0
0,0
Clip
-20,0
Nominal
-40,0
Noise
-60,0
-80,0
-100,0
-120,0
-140,0
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
Table 10.5: Analog: Low Noise with Full Output Power (Low Input / High SPL)
Figure 10.6 illustrates how moderate noise with extreme SPL can be achieved. SPL is extremely high in this
example as maximum headroom is available at the input and within the processing stage. This makes it possible to
increase the average SPL by utilizing internal compression capabilities.
•
•
•
•
Input Clip: 0 dBFS
Amp Gain: 35 dB
SNR: 114.2 dB
Absolute Noise Floor: -71.3 dBu
60.0
40.0
20.0
dB/dBu
0.0
-20.0
Clip
-40.0
Nominal
-60.0
Noise
-80.0
-100.0
-120.0
-140.0
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
Table 10.6: Analog Input: Moderate Noise with Very High Output (Very High SPL)
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10. Application Guide
10.5. Speaker Configurations
Connecting two speakers in parallel to a PLM+ power output presents a load to the amplifier which is half the
impedance of that presented by one speaker. Therefore, the current that two speakers will attempt to draw from
the output stage is double that for one speaker, and this higher current may be sufficient to cause the Current Peak
Limiter to become active. The more speakers connected to an output in parallel, the lower the impedance and the
higher the current draw.
Multiple loudspeakers may be driven by a PLM+ power output more satisfactorily if a series-parallel wiring
configuration is adopted. Please ensure care is taken to match polarity correctly.
When using series-parallel wiring, the nominal impedance is the same as with one speaker; however, the principle
of power sharing still applies, and it is not possible to get the amplifier section to deliver more than its rated power.
Note: Nominal loads as low as 2 ohms are supported by the PLM+. However, a 2 ohm nominal load
has impedance dips at its resonances below 2 ohms; in such cases it is likely that the resulting higher
current will cause CPL to activate.
10.6. Digital Audio Connections
Whenever possible, it is preferable to connect a digital rather that analog input signal to the device. This is
particularly relevant if the source signal is already in the digital domain, such as the source from a digital mixing
console or digital distribution system. The primary cause of signal distortion and signal delay (latency) is the digitalto-analog and analog-to-digital conversion process. Therefore, using digital inputs normally
provides higher quality audio with lower latency.
Two types of digital audio inputs are available: Dante networked multi-channel digital audio, and 2-channel
digital audio via the AES3. Dante-based system configurations and interconnections are explained in a separate
document, the Lake Network Configuration Guide.
The information in this section is supplied for users unfamiliar with AES3. Users already familiar with AES3 will find
that the device conforms to established conventions.
10.6.1. AES3 Digital Audio
The original AES/EBU digital audio interface standard was developed by the Audio Engineering Society in
conjunction with the European Broadcast Union. Originally published in 1985, it was revised in 1992 and 2003,
and in its current iteration it is properly designated the AES3 standard.
AES3 is a serial transmission format for linearly represented (uncompressed) digital audio data. It describes a
method for carrying two channels of periodically sampled and uniformly quantized audio signals on a single
twisted-pair cable.
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10. Application Guide
The data format allows for auxiliary data which can be used for information on signal characteristics as well as the
sampled audio data. The physical interconnection, as defined by IEC 60958 Type I, specifies three-conductor
110-ohm twisted pair cabling terminated by an XLR connector. Please refer to section 8.3 for wiring details.
AES3 provides for multiple sampling rates and resolutions of up to 24 bits; this device accepts sample rates from
44.1 to 192 kHz.
10.6.2. System Latency and Delay Compensation
All types of digital audio processing inherently involves a small processing delay referred to as latency. If the
processing chain does not involve analog-to-digital or digital-to-analog conversion, the amount of latency is usually
very small and often may be disregarded.
However, in complex systems involving multiple digital audio components and connections, enough delay may
be generated to cause audio phasing problems. Therefore, the lowest latency is always preferred, and it is always
important to consider system latency delays when calculating and adjusting overall delay for time-aligning multiple
loudspeaker systems.
10.6.3. Connections and Cabling
10.6.3.1. AES Input Connectors
Two AES-3 input signals (each carrying two audio channels) are connected to the XLR3F connectors labelled
INPUT 1-2 and INPUT 3-4 in the AES/EBU (AES-3) input section on the rear panel. Note that the Input connector
types are identical for the analog and digital inputs, so care must be taken when connecting audio, particularly
when analog inputs are used as a backup signal source. Connectors should be clearly labeled to prevent any
confusion.
Note: Never connect a digital signal source to an analog input or an analog signal source to a digital
input.
10.6.3.2. Interconnection of Multiple Units
The AES implementation in PLM+ is designed to be able to daisy-chain AES signals using passive Y-Split cables.
The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be
set to UNTERMINATED. If an AES3 distribution amplifier (DA) is being used to distribute the digital audio signals,
with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only
terminate the last processor in the chain.
Please refer to section 10.6.4 for further information.
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10. Application Guide
10.6.3.3. Cable Types and Distance Limitations
All digital connections should be made with 100 ohm balanced cables wired according to the AES3 standard (see
Section 8.2.2). Although standard analog microphone cabling may function in limited circumstances, the potential
for problems is greatly increased. AES3 contains a high-speed data stream, and requires an effective bandwidth of
up to 12 MHz, far beyond the 20 kHz required for analog audio.
The distance allowed between a signal source and the PLM+ is dependent on both cable quality and the sampling
rate used. At a 96 kHz sampling rate, any good quality AES3 cable should allow a cable run of 100 meters with no
data losses beyond the capability of internal error correction. The best cables may allow longer cable runs, though
careful trials are recommended before use in the field. Sampling rate also governs allowed cable length; a 100
meter length at 96 kHz might extend to 200 meters at 48 kHz, but be cut to 50 meters at 192 kHz.
10.6.3.4. Signal Degradation and Loss
A weak or degraded AES3 signal will exhibit no audible loss of quality as long as the robustness of the data stream
remains above the threshold required for internal error correction. As degradation approaches the threshold,
audible artifacts may be heard, including pops, clicks and momentary dropouts. Any such indications require
immediate attention, as often the window of acceptable data loss between artifacts and complete audio loss can
be very narrow.
As a precautionary measure four touring applications, it is advisable to configure all digital audio wiring prior to use.
It is recommended that all cables be tested for error-free performance at lengths 20% to 25% greater than lengths
to be used in the field in order to provide a comfortable margin of safety.
10.6.4. External Signal Distribution Hardware
10.6.4.1. Distribution Amplifiers
Dedicated distribution amplifiers for AES3 signals are available from several manufacturers. The most common
format is one input and six outputs. Digital distribution amplifiers are designed to refresh or reconstruct the signal
as well making up for line losses.
One type of distribution amplifier is a simple repeater, which restores the waveform shape and brings the signal
amplitude back up the required level. Some distribution amplifiers also offer a re-clocking feature, which also retimes the signal to prevent signal degradation from clocking errors known as jitter.
Distribution amplifiers that offer re-clocking often make the feature optional as using re-clocking can introduce
small additional amounts of latency, so should not be used unless necessary.
10.6.4.2. Passive splitters
One single AES3 input may be split into more signals using a simple passive splitter. Splitters provide a convenient
and low cost solution when only a few additional signals are required, and in situations where cable lengths are
short. Attenuation is minimal, but there is no refreshing of the signal.
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10. Application Guide
10.6.5. Additional Reference Material
Complete technical information on the AES/EBU (AES3) standard can be downloaded from the AES web site at
http://www.aes.org/publications/standards/.
10.7. Digital Clock Configuration
10.7.1. Digital Clock Overview
In order to provide a flexible and robust audio processing system, the device is equipped with a configurable digital
clocking system. The digital clock can generate various independent internal sample rates, or can sync to an
incoming AES3 signal. Figure 10.7 shows the various sample rates and options available.
INPUTS
OUTPUTS
INTERNAL
AES1
48 kHz
AES2
C
PRIMARY
CLOCK
48 kHz
96 kHz
192 kHz
C Pwr 1
DANTE
C Pwr 2
INTERNAL
48 kHz
AES1
AUTO /
MANUAL 48
AES2
C
C
SAMPLE RATE
CONVERTER
CLOCK
C
AUTO /
MANUAL 44
C Pwr 3
48 kHz
C Pwr 4
96 kHz
192 kHz
44.1 kHz
88.2 kHz
176.4 kHz
C Dante
Channel 1-8
48 / 96 kHz
INTERNAL
44.1 kHz
Table 10.7: Digital Clocking System
In Figure 10.7, each circled C represents a choice point. A choice point is a user-interface control that can be
configured using the Lake Controller software. Please refer to the Lake Controller Operation Manual for further
information.
Note: Figure 10.7 indicates internally generated clocks with base-rate multiples of 44.1 kHz or 48 kHz.
This should not be confused with the internal DSP sample rate of 96 kHz.
The PLM+ digital clocking system can either generate its own internal clock, or synchronize to an incoming
external clock source via the AES3 digital input.
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10. Application Guide
10.7.2. Clock Source Priorities
There are two options for clock source configuration: Manual Configuration or Automatic Detection.
For Manual Configuration, the selected internal or external clock source remains fixed regardless of whether a
compatible clock signal is preset.
For Automatic Detection, the most appropriate clock matching the selected base-rate is automatically selected
according to the following priorities.
1. AES1 (Input 1+2)
2. Internal Clock
When using automatic detection, the AES3 digital input is monitored and will switch the clock source back and
forth depending on the availability of an AES3 signal. Please refer to the Lake Controller Operation Manual for
additional information.
10.7.3. Dante Clock Configuration
Dante uses its own digital clocking technology across the Ethernet network to ensure that all Dante devices are
synchronized. As part of this logic, an order of priority is defined to identify which device becomes the Dante
Master. A Dante-capable device set as Preferred Clock Master is chosen as the highest priority, followed by a
device with a valid AES3 signal, then an internally generated clock.
Dante only operates at 48 kHz or 96 kHz, with the PLM+ digital clock on all Dante Slaves being overridden by the
Dante Clock.
The front panel Input View indicates if that device is selected as Dante Clock Master. Confirmation of Dante
Master / Slave status is also displayed in the Lake Controller. The Dante Preferred Master setting can be set from
the Lake Controller I/O Configuration screen, or via the Dante Controller. For further information on Digital Clock
configuration and the Lake Controller user interface, please refer to the Lake Controller Operation Manual.
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11. Technical Specifications
11. Technical Specifications
PLM 12K44
PLM 20K44
General
Processing / Network
Numbers of amplifier channels
Total burst power all channels (share among channels with RPM)
Lake / Dante
4
12000 W
Lake / Dante
4
20000 W
Max. Output Power (all ch.’s driven) 1)
2 ohms
2.67 ohms
4 ohms
8 ohms
16 ohms
Hi-Z 70 V
Hi-Z 100 V
3000 W
3000 W
3000 W
1900 W
950 W
3000 W
3000 W
4400 W
5000 W
4400 W
2300 W
1150 W
3300 W
4700 W
Max output power single channel 1)
2 ohms
2.67 ohms
4 ohms
8 ohms
16 ohms
Hi-Z 70 V
Hi-Z 100 V
4400 W
5900 W
4600 W
2300 W
1150 W
3300 W
4700 W
4400 W
5900 W
4600 W
2300 W
1150 W
3300 W
4700 W
194 V
67 A
Any channel has potential to deliver the max single
channel output power
194 V
67 A
Any channel has potential to deliver the max single
channel output power
175 V
Current Average Limiter (CAL), Very High Frequency
Protection (VHF), Direct Current Protection (DC), Short
Circuit Protection, Current-Clip Limiter, Voltage Clip
Limiter, Temperature protection
194 V
Current Average Limiter (CAL), Very High Frequency
Protection (VHF), Direct Current Protection (DC), Short
Circuit Protection, Current-Clip Limiter, Voltage Clip
Limiter, Temperature protection
< 0.05 %
< 0.04 %
> 114 dB
> 70 dB
+/- 0.05 dB
96 kHz / 32 bit floating point
1.61 / 1.68 ms
< 0.05 %
< 0.04 %
> 114 dB
> 70 dB
+/- 0.05 dB
96 kHz / 32 bit floating point
1.61 / 1.68 ms
Input redundancy / Matrix
System integration
Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ - peak and RMS limiters
Group control with Raised Cosine™ MESA EG™
asymmetric filters
Automatic 4 level input redundancy / 4 input mixers
Comprehensive 3rd party protocol over UDP Ethernet
Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ - peak and RMS limiters
Group control with Raised Cosine™ MESA EG™
asymmetric filters
Automatic 4 level input redundancy / 4 input mixers
Comprehensive 3rd party protocol over UDP Ethernet
Measurement & Analysis
Pilot tone generation and analysis
Load impedance analysis
Real Time Analyzer (RTA), 3rd party integration
Yes
Yes
Yes
Yes
Yes
Yes
Dante Audio Network
Dante I/O
Network topology / redundancy
Sample rates / transport
Network latency
8x8
Flexible topology / Supports Dual redundant networks
48, 96 kHz / Uni + Multicast
0.25, 0.5, 1.0, 2.0, 5.0 ms
8x8
Flexible topology / Supports Dual redundant networks
48, 96 kHz / Uni + Multicast
0.25, 0.5, 1.0, 2.0, 5.0 ms
Device Presets
Local memory locations for the settings of the product
100
100
AES Inputs
Inputs
Supported sample rates/ resolution
Sample rate conversion THD + N 20 Hz - 20 kHz unweighted
4 AES inputs
44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits
0.00003 %
4 AES inputs
44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits
0.00003 %
Analog Inputs
Inputs
Maximum input / digital reference
Sampling rate / resolution
Input impedance balanced / unbalanced
THD + N (typical at 1 kHz unweighted)
THD + N (typical at 20 Hz and 20 kHz unweighted)
4 high quality inputs with Iso-Float™ ground isolation
+ 26 dBu / + 21 dBu
96 kHz / 24 bit
20 k / 10 k ohm
0.00022 %
0.00033 %
4 high quality inputs with Iso-Float™ ground isolation
+ 26 dBu / + 21 dBu
96 kHz / 24 bit
20 k / 10 k ohm
0.00022 %
0.00033 %
17.8 - 194 V, step size 0.1 V
67 A peak
33 Arm
17.8 - 194 V, step size 0.1 V
67 A peak
33 Arm
Yes
Yes
Yes
Yes
Amplifier output modules (all models, all channels)
Peak output voltage
Max output current
Rational Power Management (RPM)
Default voltage limitation (can be lifted with RPM configuration)
Protection features
Audio Performance (Amplifier platform with digital input)
THD + N 20 Hz - 20 kHz for 1 W
THD + N at 1 kHz and 1 dB below clipping
Dynamic range
Channel separation (Crosstalk) at 1 kHz
Frequency response (1 W into 8 ohm, 20 Hz - 20 kHz)
Internal sample rate / Data path
Product propagation delay AES 96 kHz / analog input
Lake processing
Loudspeaker processing
System tuning
Limiters
Adjustable Inter-Sample Voltage Peak Limiter (ISVPL)
Current Peak Limiter < 300 ms
Current Average Limiter (CAL) > 300 ms
LimiterMax (rms and peak limiters)
MaxRMS (rms voltage limiter)
MaxPeak (peak voltage limiter)
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11. Technical Specifications
PLM 12K44
PLM 20K44
22 - 44 dB, step size 0.1 dB
- Inf to 0 dB, step size 0.25 dB
22 - 44 dB, step size 0.1 dB
- Inf to 0 dB, step size 0.25 dB
4 x 3 pin XLR, electronically balanced
2 x 3 pin XLR
Neutrik speakON (1 x NLT8, 2 x NLT4) or 4 binding posts (pairs)
2 x RJ45 etherCON
Via Ethernet for Lake Controller software, or DLM (the 3rd
party protocol)
Neutrik powerCON 32 A
Three fans front-to-rear airflow, temperature controlled speed
4 x 3 pin XLR, electronically balanced
2 x 3 pin XLR
Neutrik speakON (1 x NLT8, 2 x NLT4) or 4 binding posts (pairs)
2 x RJ45 etherCON
Via Ethernet for Lake Controller software, or DLM (the 3rd
party protocol)
Neutrik powerCON 32 A
Three fans front-to-rear airflow, temperature controlled speed
2.5 inch, Black / white, daylight readable LCD
RGD LED’s and detailed fault description on display
8 provided
On / Standby
Enables muting of outputs and inputs via soft-button keypad
Toggles through meter views
Provides a menu driven interface for full function front panel
control
Yes
Provides a “back” function
2.5 inch, Black / white, daylight readable LCD
RGD LED’s and detailed fault description on display
8 provided
On / Standby
Enables muting of outputs and inputs via soft-button keypad
Toggles through meter views
Provides a menu driven interface for full function front panel
control
Yes
Provides a “back” function
100 - 240 V AC 45- 66 Hz
70 - 265 V AC
NEMA L5-30 “Twist lock” 125 V / 30 A, and CEE 7/7
“Schuko” 230 V / 16 A
100 - 240 V AC 45- 66 Hz
70 - 265 V AC
NEMA L5-30 “Twist lock” 125 V / 30 A, and CEE 7/7
“Schuko” 230 V / 16 A
Yes / Max 8 Ampere
0.98
Yes
Configurable current threshold and breaker profile
25 A
Yes
Yes
Yes
Yes / Max 8 Ampere
0.98
Yes
Configurable current threshold and breaker profile
32 A
Yes
Yes
Yes
W: 483 mm (19”), H: 88 mm (2 U), D: 424 mm (16.7”)
D: 498 mm (19.6”)
W: 483 mm (19”), H: 88 mm (2 U), D: 424 mm (16.7”)
D: 498 mm (19.6”)
Weight
Finish
16.5 kg (36 lbs)
Black painted steel chassis with black painted steel / aluminium
front
17 kg (37 lbs)
Black painted steel chassis with black painted steel / aluminium
front
Approvals
CE, ANSI / UL 60065 (ETL), CSA C22.2 NO. 60065, FCC,
PSE, RCM, BIS India
CE, ANSI / UL 60065 (ETL), CSA C22.2 NO. 60065, FCC,
PSE, RCM, BIS India
Gain
Amplifier gain
Analog attenuator
Rear-panel interface
Analog inputs
AES inputs
Output connectors
Auto 100/1000, Auto Uplink
Control and monitoring interface
Detachable mains cord
Cooling
Front-panel interface
Display
Fault / Warning / Limit / Clip indicators
Mute and soft function buttons
Standby Power button
Mute Enable button
Meter button
Menu button
Rotary Encoder
Exit button
Mains power
Nominal voltage
Operating voltage
Mains wall plug
Power supply features
Soft start / Inrush power
Power Factor Correction (PFC)
Regulated switch mode power supply
Breaker Emulation Limiter (BEL)
BEL max current threshold
Power Average Limiter (PAL)
Under Voltage Limiter (UVL)
Mains under voltage and overvoltage protection
and mains glitch tolerance
Dimensions
Rack rail to rear panel
Overall depth including handles and rear support
Note 1): Lab.gruppen burst power (1 kHz, 25 ms burst power @ 150 BPM, 12 dB Crest factor)
All specifications are subject to change without notice.
Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM, Powered Loudspeaker Management, R.SMPS, LoadLibrary, LoadSmart,
SpeakerSafe, BEL, UVL and ISVPL are trademarks of Lab.gruppen AB. Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. Contour, Mesa Quad EQ, Mesa
Parametric EQ, Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories. Audinate is a registered trademark of Audinate Pty Ltd. Dante and Zen are trademarks
of Audinate Pty Ltd. All other trademarks remain the property of their respective owners.
Copyright © 2014 Lab.gruppen AB.
All rights reserved.
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12. Warranty and Support
12. Warranty and Support
12.1. General
This product is manufactured by Lab.gruppen, and it is warranted to be free from any defects caused by
components or factory workmanship, under normal use and service, for a period of six (6) years from date of
purchase from an authorized Lab.gruppen dealer.
If the product fails to perform as specified during the warranty period, Lab.gruppen will undertake to repair, or at its
option, replace this product at no charge to its owner, provided the unit is returned undamaged, shipping prepaid,
to an authorized service facility or to the factory.
This warranty shall be null and void if the product is subjected to: repair work or alteration by a person other
than those authorized by us; mechanical damage including shipping accidents; war, civil insurrection, misuse,
abuse, operation with incorrect AC voltage; incorrect connections or accessories; operation with faulty associated
equipment; or exposure to inclement weather conditions. Damage due to normal wear and tear is not covered
by the warranty. Units on which the serial number has been removed or defaced will not be eligible for warranty
service.
Lab.gruppen shall not be responsible for any incidental or consequential damages. Lab.gruppen’s responsibility is
limited to the product itself. Lab.gruppen takes no responsibility for any loss due to cancellation of any events, or
rent of replacement equipment or costs due to a third party’s or customer’s loss of profit, or any other indirect cost
or losses however incurred.
Lab.gruppen reserves the right to make changes or improvements in design or manufacturing without assuming
any obligation to change or improve products previously manufactured.
This warranty is exclusive, and no other warranty is expressed or implied. This warranty does not affect the
customer’s statutory rights.
12.2. International Warranties
Please contact your supplier or distributor for this information, as rights and disclaimers may vary from country to
country.
12.3. Technical Assistance and Service
12.3.1. International Service
If your Lab.gruppen product requires repair, contact your Lab.gruppen dealer or distributor, visit
http://labgruppen.com/support/find_service_centre/ or contact Lab.gruppen by fax or email to obtain details for
the nearest authorized service centre.
PLM+ SERIES Operation Manual rev 1.0.0
87
12. Warranty and Support
12.3.2. Factory Service
In the event a Lab.gruppen product requires factory service, you may contact Lab.gruppen’s service department
for return instructions and a Return Authorization number.
Please note for product return:
1. Use the original packing.
2. Include a copy of the sales receipt, your name, return address, phone and fax number, email address and
description of the defect.
3. Mark the Return Authorization number on the outside of the packing.
4. Ship the product prepaid to:
Lab.gruppen
Faktorvägen 1
SE-434 37 Kungsbacka
SWEDEN
Phone: +46 300 56 28 00
Fax:
+46 300 56 28 99
[email protected]
www.labgruppen.com
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Notes
Notes
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Notes
Notes
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Notes
Notes
PLM+ SERIES Operation Manual rev 1.0.0
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Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM+, Powered Loudspeaker
Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe, ISVPL, BEL, UVL and CAL are trademarks of Lab.gruppen AB. Dolby is a
registered trademark of Dolby Laboratories. Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories.
Audinate is a registered trademark of Audinate Pty Ltd. Dante and Zen are trademarks of Audinate Pty Ltd. All other trademarks remain the
property of their respective owners.
Copyright © 2014 Lab.gruppen AB. All rights reserved.
Item no. OM-PLM+
labgruppen.com