Extron MPA 152 Plus User Guide

MPA 152 Plus
Stereo Mini Power Amplifier
User Guide
Power Amplifier
68-1320-03, Rev. E
06 26
Safety Instructions
Safety Instructions • English
Instructions de sécurité • Français
WARNING: This symbol,
, when used on the product, is intended to
alert the user of the presence of uninsulated dangerous voltage within the
product’s enclosure that may present a risk of electric shock.
ATTENTION: This symbol,
, when used on the product, is intended to alert
the user of important operating and maintenance (servicing) instructions in
the literature provided with the equipment.
For information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics, see the Extron Safety and Regulatory
Compliance Guide, part number 68-290-01, on the Extron website,
www.extron.com.
AVERTISSEMENT : Ce pictogramme,
, lorsqu’il est utilisé sur le produit,
signale à l’utilisateur la présence à l’intérieur du boîtier du produit d’une
tension électrique dangereuse susceptible de provoquer un choc électrique.
ATTENTION : Ce pictogramme,
, lorsqu’il est utilisé sur le produit, signale
à l’utilisateur des instructions d’utilisation ou de maintenance importantes
qui se trouvent dans la documentation fournie avec l’équipement.
Pour en savoir plus sur les règles de sécurité, la conformité à la réglementation,
la compatibilité EMI/EMF, l’accessibilité, et autres sujets connexes, lisez les
informations de sécurité et de conformité Extron, réf. 68‑290-01, sur le site Extron,
www.extron.com.
Istruzioni di sicurezza • Italiano
AVVERTENZA: Il simbolo,
, se usato sul prodotto, serve ad avvertire
l’utente della presenza di tensione non isolata pericolosa all’interno del
contenitore del prodotto che può costituire un rischio di scosse elettriche.
ATTENTZIONE: Il simbolo,
, se usato sul prodotto, serve ad avvertire
l’utente della presenza di importanti istruzioni di funzionamento e
manutenzione nella documentazione fornita con l’apparecchio.
www.extron.com
Sicherheitsanweisungen • Deutsch
WARUNG: Dieses Symbol
auf demProdukt soll den Benutzer darauf
aufmerksam machen, dass im Inneren des Gehäuses dieses Produktes
gefährliche Spannungen herrschen, die nicht isoliert sind und die einen
elektrischen Schlag verursachen können.
VORSICHT: Dieses Symbol
auf dem Produkt soll dem Benutzer in der im
Lieferumfang enthaltenen Dokumentation besonders wichtige Hinweise zur
Bedienung und Wartung (Instandhaltung) geben.
Weitere Informationen über die Sicherheitsrichtlinien, Produkthandhabung,
EMI/EMF-Kompatibilität, Zugänglichkeit und verwandte Themen finden Sie in den
Extron-Richtlinien für Sicherheit und Handhabung (Artikelnummer 68-290-01) auf
der Extron-Website, www.extron.com.
Instrucciones de seguridad • Español
ADVERTENCIA:
Este símbolo,
, cuando se utiliza en el producto,
avisa al usuario de la presencia de voltaje peligroso sin aislar dentro del
producto, lo que puede representar un riesgo de descarga eléctrica.
ATENCIÓN: Este símbolo,
, cuando se utiliza en el producto,
avisa al usuario de la presencia de importantes instrucciones de uso y
mantenimiento estas estan incluidas en la documentación proporcionada
con el equipo.
Para obtener información sobre directrices de seguridad, cumplimiento de
normativas, compatibilidad electromagnética, accesibilidad y temas relacionados,
consulte la Guía de cumplimiento de normativas y seguridad de Extron, referencia
68-290-01, en el sitio Web de Extron, www.extron.com.
Per informazioni su parametri di sicurezza, conformità alle normative, compatibilità
EMI/EMF, accessibilità e argomenti simili, fare riferimento alla Guida alla conformità
normativa e di sicurezza di Extron, cod. articolo 68‑290‑01, sul sito web di Extron,
www.extron.com.
Instrukcje bezpieczeństwa • Polska
OSTRZEŻENIE: Ten symbol,
, gdy używany na produkt, ma na celu
poinformować użytkownika o obecności izolowanego i niebezpiecznego
napięcia wewnątrz obudowy produktu, który może stanowić zagrożenie
porażenia prądem elektrycznym.
UWAGI: Ten symbol,
, gdy używany na produkt, jest przeznaczony do
ostrzegania użytkownika ważne operacyjne oraz instrukcje konserwacji
(obsługi) w literaturze, wyposażone w sprzęt.
Informacji na temat wytycznych w sprawie bezpieczeństwa, regulacji wzajemnej
zgodności, zgodność EMI/EMF, dostępności i Tematy pokrewne, zobacz Extron
bezpieczeństwa i regulacyjnego zgodności przewodnik, część numer 68-290-01, na
stronie internetowej Extron, www.extron.com.
Инструкция по технике безопасности • Русский
ПРЕДУПРЕЖДЕНИЕ:
Данный символ,
, если указан
на продукте, предупреждает пользователя о наличии
неизолированного опасного напряжения внутри корпуса
продукта, которое может привести к поражению электрическим
током.
ВНИМАНИЕ: Данный символ,
, если указан на продукте,
предупреждает пользователя о наличии важных инструкций по
эксплуатации и обслуживанию в руководстве, прилагаемом к
данному оборудованию.
Для получения информации о правилах техники безопасности,
соблюдении нормативных требований, электромагнитной
совместимости (ЭМП/ЭДС), возможности доступа и других вопросах
см. руководство по безопасности и соблюдению нормативных
требований Extron на сайте Extron: , www.extron.com, номер по
каталогу - 68-290-01.
安全说明 • 简体中文
警告： 产品上的这个标志意在警告用户, 该产品机壳内有暴露的危险电
压，有触电危险。
注意： 产品上的这个标志意在提示用户, 设备随附的用户手册中有重要
的操作和维护(维修)说明。
关于我们产品的安全指南、遵循的规范、EMI/EMF 的兼容性、无障碍使
用的特性等相关内容，敬请访问 Extron 网站 , www.extron.com，参见
Extron 安全规范指南，产品编号 68-290-01。
Copyright
© 2013-2026 Extron. All rights reserved. www.extron.com
Trademarks
All trademarks mentioned in this guide are the properties of their respective owners.
The following registered trademarks (®), registered service marks (SM), and trademarks (TM) are the property of RGB Systems, Inc. or Extron (see the
current list of trademarks on the Terms of Use page at www.extron.com):
Registered Trademarks (®)
Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, eLink, Flat Field, FlexOS, Glitch Free, Global Configurator,
Global Scripter, GlobalViewer, Hideaway, HyperLane, IP Intercom, IP Link, Key Minder, LinkLicense, LockIt, MediaLink, MediaPort, NAV,
NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, ShareLink, Show Me, SoundField, SpeedMount, SpeedSwitch, StudioStation,
System INTEGRATOR, TeamWork, TouchLink, V‑Lock, VN‑Matrix, VoiceLift, WallVault, WindoWall, XPA, XTP, XTP Systems, and ZipClip
Registered Service Mark(SM) : S3 Service Support Solutions
Trademarks (™)
AAP, AFL (Accu‑RATE Frame Lock), ADSP (Advanced Digital Sync Processing), AVEdge, CableCover, CDRS (Class D Ripple Suppression),
Codec Connect, DDSP (Digital Display Sync Processing), DMI (Dynamic Motion Interpolation), Driver Configurator, DSP Configurator, DSVP (Digital
Sync Validation Processing), Ecofficient, EQIP, Everlast, FastBite, Flex55, FOX, FOXBOX, InstaWake, IP Intercom HelpDesk, MAAP, MicroDigital,
Opti‑Torque, PendantConnect, ProDSP, QS‑FPC (QuickSwitch Front Panel Controller), Room Agent, Scope‑Trigger, SIS, Simple Instruction Set,
Skew‑Free, SpeedNav, Triple‑Action Switching, True4K, True8K, Vector™ 4K, WebShare, XTRA, and ZipCaddy
FCC Class B Notice
NOTE: This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) This device must accept any interference
received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC rules. These limits provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. There is no
guarantee that interference will not occur. If this equipment does cause interference to radio or television
reception, which can be determined by turning the equipment off and on, you are encouraged to try to correct the
interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
In order to maintain compliance with FCC regulations, shielded cables must be used with this equipment.
Operation with non-approved equipment or unshielded cables is likely to result in interference to radio and TV
reception. The user is cautioned that changes and modifications made to the equipment without the approval of
the manufacturer could void the user’s authority to operate this equipment.
NOTE: For more information on safety guidelines, regulatory compliances, EMI/EMF compatibility,
accessibility, and related topics see the Extron Safety and Regulatory Compliance Guide on the Extron
website.
Conventions Battery Notice
This product contains a battery. Do not open the unit to replace the battery. If the battery needs replacing,
return the entire unit to Extron (for the correct address, see the Extron Warranty section on the last page of this
guide).
CAUTION: Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to
the instructions.
ATTENTION : Risque d’explosion. Ne pas remplacer la pile par le mauvais type de pile. Débarrassez-vous
des piles utilisées selon le mode d’emploi.
Conventions Used in this Guide
Notifications
The following notifications are used in this guide:
WARNING: Potential risk of severe injury or death.
AVERTISSEMENT : Risque potentiel de blessure grave ou de mort.
CAUTION: Risk of minor personal injury.
ATTENTION : Risque de blessure mineure.
ATTENTION:
•
•
Risk of property damage.
Risque de dommages matériels.
NOTE: A note draws attention to important information.
TIP:
A tip provides a suggestion to make working with the application easier.
Specifications Availability
Product specifications are available on the Extron website, www.extron.com.
Extron Glossary of Terms
A glossary of terms is available at https://www.extron.com/technology/glossary.aspx.
Contents
Introduction.............................................................................................................................................. 1
About this Guide....................................................................................................................................................1
Important Safety Instructions.................................................................................................................................1
About the MPA 152 Plus........................................................................................................................................2
Features................................................................................................................................................................2
Application Diagram..............................................................................................................................................3
Installation................................................................................................................................................ 4
Rear Panel Connections........................................................................................................................................4
Operation.................................................................................................................................................. 8
Front Panel Features.............................................................................................................................................8
Setting Input Level.................................................................................................................................................8
Setting Bass and Treble........................................................................................................................................9
Remote Control Operation.....................................................................................................................................9
Controlling Multiple Amplifiers with One Remote Controller..........................................................................10
Control Options............................................................................................................................................. 11
Defeating the Auto Power-down Timer................................................................................................................ 11
Troubleshooting...................................................................................................................................................13
Amplifier Fails to Exit Standby Mode Promptly.............................................................................................13
Amplifier Enters Standby Mode Too Early.....................................................................................................13
Mounting................................................................................................................................................ 14
Plenum Placement..............................................................................................................................................14
Tabletop Placement.............................................................................................................................................14
Rack Mounting.....................................................................................................................................................14
Under-Desk, Through-Desk, and Projector Mounting.........................................................................................15
MPA 152 Plus • Contents
vii
MPA 152 Plus • Contents
viii
Introduction
This section provides an overview of the MPA 152 Plus Mini Power Amplifiers and covers the following topics:
•
About this Guide
•
About the MPA 152 Plus
•
Important Safety Instructions
•
Features
•
Application Diagram
About this Guide
This guide contains information about the Extron MPA 152 Plus Mini Power Amplifier with instructions for
experienced installers on how to install, configure, and operate the equipment.
In this guide the terms, “MPA,” “device,” and “amplifier” are used interchangeably to refer to this product unless
otherwise specified
Important Safety Instructions
•
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 instructions of the manufacturer.
•
Do not install near any heat sources such as radiators, heat registers, stoves, or any other apparatus that
produces 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 are provided for safety.
•
If the provided plug does not fit into the outlet, consult an electrician for replacement of the obsolete
outlet.
•
Protect power cables from being walked on or pinched. This should be especially avoided at plugs,
convenience receptacles, and points where the cables exit from the device.
•
Only use attachments or accessories specified by the manufacturer.
•
Use only with the 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 or apparatus combination to avoid injury
from tipping over.
•
Unplug this device during lightning storms or when unused for long periods of time.
•
Refer all servicing to qualified service personnel. Servicing is required when the amplifier has been damaged
in any way, such as if the power supply cable or plug have been damaged, the amp has been dropped, liquid
has been spilled on the amplifier, objects have fallen into the amplifier, the amplifier has been exposed to rain
or moisture, or any time the amplifier does not operate normally.
MPA 152 Plus • Introduction
1
About the MPA 152 Plus
 he Extron MPA 152 Plus is an Ecofficient Level 3 qualified mono amplifier, with an Extron exclusive, highly
T
efficient, advanced Class D amplifier design. It also features patented CDRS (Class D Ripple Suppression)
technology that provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional
Class D amplifiers. The high efficiency design generates very little heat and allows the amplifier to be fanless and
operated in environments with little or no ventilation.
This stereo integrated mini power amplifier delivers up to 15 watts (rms) per channel stereo or dual mono into a
4 ohm sound system, or 8 watts (rms) per channel into an 8 ohm system. This model features a 90 dB signal-tonoise ratio with 0.1% THD+N, offering exceptional performance for speaker systems requiring compact,
economical, audio amplification.
Front panel controls allow easy adjustment of bass and treble volume and input level.
The quarter rack size allows a variety of mounting options. The unit complies with UL 2043 for smoke and heat
release for in-the-ceiling installations. It can be installed in the plenum space of the ceiling. Alternatively, the units
can be mounted on a tabletop, in a rack, under a desk, or in a projector mounting kit.
Features
•
30 watts RMS output power — Delivers up to 15 watts (rms) per channel, stereo or dual mono, into a 4 ohm
speaker system or up to 8 watts (rms) per channel into an 8 ohm system. Provides significant audio output for
small integration projects with moderate sound system needs.
•
Improved signal-to-noise ratio — The 90 dB unweighted signal-to-noise ratio allows very low-noise
operation, ensures quiet, hiss-free amplification, and maintains audio signal integrity.
•
Professional grade signal-to-noise of >90 dB and <0.1% THD+N — Ultra-low noise performance makes
the MPA 152 Plus ideal for use in applications where fidelity is critical.
•
Ecofficient Level 3 — Includes an automatic standby mode that provides industry-leading power
conservation, with standard amplifiers consuming as little as one watt and network amplifiers consuming as
little as four watts when in standby.
•
Bass, treble, and input level controls — Provides the ability to properly set gain structure and make tonal
changes in simple systems for optimized sound quality.
•
Extron Patented CDRS™ - Class D Ripple Suppression — CDRS is an Extron Patented technology that
provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D
amplifier designs. CDRS eliminates the high frequency switching ripple characteristic of Class D amplifiers, a
source of RF emissions which can interfere with sensitive AV equipment such as wireless microphones.
•
Front panel bass, treble, and input level controls — These are flush mounted and detented. They allow
quick attenuation of input signal and ±10 dB bass and treble shelving controls.
•
Stereo or Dual Mono toggle switch — Allows the user to choose between stereo output or to sum the left
and right inputs and produce dual mono outputs (see figure 7 on page 8). This eliminates the need for
external summing products in monoaural installations.
•
UL 2043 plenum rated — The MPA 152 Plus complies with UL 2043 for smoke and heat release for
installation within a plenum airspace above a drop ceiling (power supply excluded). Above‑the-ceiling
placement conceals the amplifier to prevent theft, and is convenient for installing equipment when space
inside the room is limited.
•
Three audio inputs — Accept balanced or unbalanced stereo line-level signals on a captive screw connector
and unbalanced stereo line-level signals on an RCA stereo pair, and a 3.5 mm stereo mini jack. This ensures
the amplifier can be easily integrated with a wide variety of sources and projectors.
The three stereo inputs are individually buffered and can be connected to three separate sources at the same
time without altering performance.
MPA 152 Plus • Introduction
2
•
Auto power-down with fast power-up — The MPA 152 Plus meets Ecofficient Level 3 qualification
requirements with an auto power-down feature that automatically places the amplifier into standby after
25 minutes of inactivity, dramatically reducing power consumption. It quickly returns to full power status in less
than one second upon signal detection.
•
Defeatable auto-standby timer — Automatic timed standby feature can be disabled for sensitive applications
that require uninterrupted operation.
•
Automatic clip limiter — Detects actual onset of clipping by comparing input and output waveforms. Gain is
automatically reduced without audible artifacts to protect speakers from clipping distortion.
•
Remote volume and mute control port — In basic installations without control systems, this port allows the
MPA 152 Plus to be remotely controlled using the optional Extron VCM 100 or VCM 200 analog volume and
mute controller or VC 50 analog volume controller.
•
5 mm screw-lock captive screw speaker connector — Enables simple, secure connections with 22 to
12 AWG speaker cables.
•
Rack-mountable 1U high, 3 inch deep, quarter rack wide metal enclosure
•
Extron Everlast power supply included — Provides worldwide power compatibility, with high demonstrated
reliability and low power consumption.
Application Diagram
1
SP
DI
EO
VID
Y
LA
2
X
AU
EO
VID
OFF
ON
3
PC
ME
4
LU
VO
IG
NF
CO
E
AG
IM TE
MU
US
4 IP
MLC
Projector
Ex
RS-232 or
IR Projector
control
Audio
OUTPUT
s
MPA
lu
2P
15
R
WE
PO
X
V
12 A MA
0.7
TS
INPU
R
V
10V
REMOTE
R
L
L
S-Video
RGBHV
R
Audio
L
Laptop
Extron
MPA 152 Plus
Mini Power
Amplifier
Extron
MLC 104 IP Plus
Video
Audio
G
C 50mA
n
tro
MediaLink Controller
with IP Link
Audio
/ 4Ω
8Ω S 2
AS
CL RING
WI
PL
10
Extron
SM 3
DVD/VCR
Combo
Full-range
Speakers
Figure 1.
MPA 152 Plus Application Diagram
MPA 152 Plus • Introduction
3
Installation
This section discusses the MPA 152 Plus rear panel features and instructions for cabling.
Rear Panel Connections
OUTPUTS
MPA 152 Plus
8Ω / 4Ω
CLASS 2
WIRING
R
L
L
A
B
C
R
L
POWER
12V
0.7A MAX
R
V
10V
D
G
50mA
E
A Power Connector
B RCA Audio Input Connectors
C 3.5 mm TRS Audio Input Connector
Figure 2.
C
REMOTE
INPUTS
F
D Captive Screw Audio Input Connector
E Remote Input Connector
F Speaker Output Connection
MPA 152 Plus Rear Panel Connections
A Power Connector — A 24 W desktop power supply is provided. Connect one end of the DC power cord to
one of the 2-pole 3.5 mm captive screw outlets on the power supply. Connect the other end into the power
connector on the rear panel of the amplifier as shown above. The power cord connectors are correctly wired
when shipped (see figure 3 below for instructions on connecting the power supply).
MPA 152 Plus
Amplifier
POWER
12V
0.7A MAX
Power
Receptacle
Smooth
Ridges
A
A
POWER
12V
0.7A MAX
Power Supply
Output Cord
DC Power Cord
Captive Screw
Connector
Tie
Wrap
SECTION A–A
3/16"
(5 mm) Max.
AC Power Cord
G Ground
+12 VDC input
Ground all
Devices
External Power Supply
(12 VDC, 2.0 A)
Figure 3.
Connecting the PS 1242 Power Supply to the MPA 152 Plus Amplifier
MPA 152 Plus • Installation
4
ATTENTION:
•
Always use a power supply provided by or specified by Extron. Use of an unauthorized power
supply voids all regulatory compliance certification and may cause damage to the supply and the
end product.
•
Utilisez toujours une source d’alimentation fournie ou recommandée par Extron. L’utilisation d’une
source d’alimentation non autorisée annule toute certification de conformité réglementaire, et peut
endommager la source d’alimentation et l’unité.
•
Suitable for use in environmental air space in accordance with Section 300.22.C of the National
Electrical Code, and Sections 2-128, 12 010(3) and 12-100 of the Canadian Electrical Code,
Part 1, C22.1.
•
Convient à une utilisation dans les conduits d’aération, en accord avec la section 300.22.C du
code national d’électricité américain, et avec les sections 2-128, 12-010(3) et 12-100 du code
d’électricité canadien, partie 1, C22.1.
•
Unless otherwise stated, the AC/DC adapters are not suitable for use in air handling spaces or in
wall cavities.
•
Sauf mention contraire, les adaptateurs CA/CC ne conviennent pas à une utilisation dans les
espaces d’aération ou dans les cavités murales.
•
The installation must always be in accordance with the applicable provisions of National Electrical
Code ANSI/NFPA 70, article 725 and the Canadian Electrical Code part 1, section 16.
•
L’installation doit toujours être conforme aux dispositions applicables du Code américain de
l’électricité (National Electrical Code) ANSI/NFPA 70, article 75, et du Code canadien de
l’électricité, partie 1, section 16.
•
The power supply shall not be permanently fixed to building structure or similar structure.
•
La source d’alimentation ne devra pas être fixée de façon permanente à une structure de bâtiment
ou à une structure similaire.
•
Although the amplifier is plenum rated, the power supply provided with it is not. Cables to and from
the amplifier must also be plenum rated. The power supply must not be placed in the plenum
space. The DC power cord provided with the unit is not plenum rated.
•
Bien que l’amplificateur soit conforme à la norme relative aux faux plafonds, la source
d’alimentation fournie avec ne l’est pas. Les câbles depuis et vers l’amplificateur doivent aussi être
classés plenum. La source d’alimentation ne doit pas être placée dans l’espace plenum. Le cordon
d’alimentation CC fourni avec l’unité n’est pas classé plenum.
•
The length of the exposed wires in the stripping process is critical.
•
La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder.
•
The ideal length is 3/16 inches (5 mm). Any longer and the exposed wires may touch, causing a
short circuit between them. Any shorter and the wires can be easily pulled out even if tightly
fastened by the captive screws.
•
La longueur idéale est de 5 mm (3/16 inches). S’ils sont un peu plus longs, les câbles exposés
pourraient se toucher et provoquer un court circuit. S’ils sont un peu plus courts, ils pourraient
sortir, même s’ils sont attachés par les vis captives.
•
Do not tin the wires. Tinned wires are not as secure in the captive screw terminals and could pull
out.
•
Ne pas étamer les câbles. Les câbles étamés ne sont pas aussi bien fixés dans les terminaisons
des à vis captives et pourraient sortir.
MPA 152 Plus • Installation
5
B RCA Audio Input Connectors (see figure 2 on page 4) — These connectors
accept unbalanced, line level audio signal. The input can be stereo, using two
RCA connectors, or mono, using a single RCA connector plugged into the left
(summed) connector (see the wiring example on the right).
If unused, the connectors automatically terminate to lower the noise floor.
C 3.5 mm TRS Audio Input Connector — This connector accepts unbalanced,
line level audio signal through a 3.5 mm tip ring sleeve (TRS) connector.
If unused, the connector automatically terminates to lower the noise floor
(see the 3.5 mm TRS wiring example on the right).
Tip (+)
Sleeve ( )
RCA Connector
Tip (L)
Ring (R)
Sleeve ( )
D Captive Screw Audio Input Connector — This 5‑pole 3.5 mm captive screw
3.5 mm TRS Connector
connector accepts line level, balanced or unbalanced, mono or stereo audio
signal. Figure 4 shows connector wiring for the appropriate input type.
L
Unbalanced Mono Input
R
Balanced Stereo Input
Tip
Ring
Sleeve
R
Figure 4.
L
Unbalanced Stereo Input
Tip
Sleeve
R
R
Tip
Ring
Sleeves
Tip
Ring
L
L
Tip
Sleeve
Tip
Sleeve
Balanced Mono Input
Audio Input Connector Wiring Example
NOTES:
•
The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inch
(5 mm). If the exposed portion is longer, the wires may touch, causing a short circuit between
them. If the exposed wires are shorter, they can be easily pulled out, even if tightly fastened by the
captive screws.
•
Do not tin the wires. Tinned wire does not hold its shape and can become loose over time.
Depending on the position of the front panel toggle switch (figure 7, B, on page 8), the right and left
channels may be output as a stereo signal or as a dual mono signal. See Audio Output on page 9 for more
information.
E Remote Input Connector — This 3-pole captive screw connector allows a wall‑mounted audio controller to
control volume and mute remotely. For more information on operating a remote controller, see Remote
Control Operation on page 9.
REMOTE
V C G
10V
50mA
10 V (Pin 1)
Volume Pot
10k ohms
2k ohms
Vol/Mute
(Pin 2)
Mute
Switch
Ground (Pin 3)
Figure 5.
Remote Input Connector
F Speaker Output Connector (see figure 2 on page 4) — This 4-pole, 5 mm screw lock captive screw
receptacle is used to connect the amplifier to the speakers. With an 8 ohm load, the amplifier produces up to
8 watts per channel. With a 4 ohm load, the amplifier produces up to 15 watts per channel.
MPA 152 Plus • Installation
6
ATTENTION:
•
The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inch
(5 mm). If the exposed portion is longer, the wires may touch, causing a short circuit between
them. If the exposed wires are shorter, they can be easily pulled out, even if tightly fastened by the
captive screws.
•
La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La
longueur idéale est de 5 mm (3/16 inches). S’ils sont un peu plus longs, les câbles exposés
pourraient se toucher et provoquer un court circuit. S’ils sont un peu plus courts, ils pourraient
sortir, même s’ils sont attachés par les vis captives.
•
•
Do not ground or short the speaker outputs as this will damage the amplifier.
Ne pas mettre à la terre ni créer de court-circuit dans les sorties de l’enceinte, afin d’éviter tout
risque de détérioration de l’amplificateur.
•
Do not tin the wires. Tinned wire does not hold its shape and can become loose over time.
•
Ne pas étamer les câbles. Les câbles étamés ne sont pas aussi bien fixés dans les terminaisons
des à vis captives et pourraient sortir.
Captive
Screw
Left
+
+
Stereo
+
RCA
+
TRS
+
+
+
Captive
Screw
Right
RCA
TRS
+
Dual
Mono
+
+
+
+
Stereo
Amp Stage
Stereo/Dual Mono Switch
Figure 6.
MPA 152 Plus Signal Summing Diagram
Signal flow is as follows:
1. The MPA 152 Plus sums and weights the left unbalanced signals from the TRS and RCA inputs. This
summed, unbalanced signal is then summed with the left balanced signal from the captive screw input.
2. The right channel is handled in the same way.
3. The left and right channels are then sent to the output amplifiers in one of two ways, depending on how the
front panel switch (figure 7, B, page 8) is set.
•
Stereo: The left and right channels are sent to the left and right output amplifiers respectively.
•
Dual Mono: The left and right channels are summed and then the resulting mono is fed to both of the
output amplifiers.
NOTE: The captive screw, RCA, and TRS inputs are buffered.
MPA 152 Plus • Installation
7
Operation
This section provides information about the front panel features and operation of the MPA 152 Plus and covers
the following topics:
•
Front Panel Features
•
Remote Control Operation
•
Setting Input Level
•
Defeating the Auto Power-down Timer
•
Setting Bass and Treble
•
Troubleshooting
Front Panel Features
STEREO
A
LEVEL
BASS
DUAL
MONO
TREBLE
MPA 152 Plus
MINI POWER AMPLIFIER
B
Figure 7.
C
MPA 152 Plus Front Panel
A Power LED — Lights green when the unit is fully on and amber when the unit is in standby mode (after
25 minutes of inactivity).
B STEREO or DUAL MONO toggle switch — Allows the user to choose between stereo output for stereo
applications (default) or dual mono output for mono applications.
C LEVEL, BASS, and TREBLE Potentiometer — Adjusts the amount of attenuation or gain applied to the
Level, Base and Treble frequencies of the input signal (±10 dB ≥ 10 kHz).
Setting Input Level
To adjust the attenuation of the input signal:
1. If necessary, unplug the remote connector from the unit.
2. If connecting the amplifier to a system with adjustable volume, use a flat head screwdriver (such as the
provided Extron Tweeker) to adjust the LEVEL potentiometer to its minimum setting (fully counterclockwise).
3. Set the system volume to its maximum level. No sound should come out.
4. Slowly increase the amplifier LEVEL until sound distortion starts to occur (rotate potentiometer clockwise).
5. Lower the LEVEL slightly until the distortion disappears. This setting ensures that whatever the system volume
setting may be, no clipping occurs.
MPA 152 Plus • Operation
8
Setting Bass and Treble
To adjust the bass and treble (Using a small flat head screwdriver, such as the provided Extron Tweeker):
1. Adjust the BASS potentiometer to increase or decrease the bass shelving ±10 dB at 80 Hz and below.
2.
Adjust the TREBLE potentiometer to increase or decrease the treble shelving ±10 dB at 10 kHz and above.
NOTES:
•
When the potentiometer is at the center detent (vertical), the frequency response is flat. Turning the
BASS or TREBLE potentiometers counterclockwise decreases the output level at the specified
frequencies, while turning the potentiometers clockwise increases the level at the specified frequencies.
•
Increasing the bass or treble levels after setting the input level may result in clipping.
•
Exercise caution when adjusting the bass. It is possible to saturate the transformer cores of high
impedance speakers if the bass is set incorrectly.
Remote Control Operation
Options for remote control include the Extron VC 50, VCM 110 AAP, VCM 200 series, MLA VC10 Plus, and select
MLC controllers. For information on these devices, including part numbers, go to www.extron.com. Third party
10k potentiometer volume controllers can also be used for remote volume and mute control.
See figure 8 and the bullets below for wiring the VCM 100 MAAP. Wiring for the other Extron remote control units
is similar.
R
REMOTE
10 V (Pin 1)
Volume Pot
10K Ohms
2K
Mute
Switch
V
C G
Vol/Mute
(Pin 2)
GND (Pin 3)
Figure 8.
Remote Control Wiring
•
Pin 1 is 10 VDC reference voltage.
•
Pin 2 (Vol/Mute) can be used as a variable voltage input between 0 and 10 VDC with 0V providing full
attenuation and 10V providing no attenuation. It can also be used for remote control muting. Sound is muted
while the pin is shorted to ground.
•
Pin 3 is ground.
NOTE: All nominal levels are ±10%.
MPA 152 Plus • Operation
9
Controlling Multiple Amplifiers with One Remote Controller
Several MPA 152 Plus units can be daisy‑chained so that one volume controller can simultaneously regulate the
volume of all the amplifiers.
NOTES:
•
As additional amplifiers are added to the daisy chain, the sensitivity of the remote control volume
potentiometer will change. The maximum level (fully clockwise) will not be affected. However, the
effectiveness of the minimum level (fully counterclockwise) in reducing the volume to inaudible levels
decreases as more amplifiers are added to the daisy chain.
•
When more than two MPA units are attached to the chain, sound may begin to be heard even if the
levels have been set to their lowest. Muting the output can be achieved with a contact closure button
attached between the Vol/Mute and Ground pin of the first MPA in the chain.
To regulate multiple amplifiers with a single remote controller:
1. Attach all three pins of the volume controller to the corresponding pins on the first MPA 152 Plus unit (ground
to ground, Vol/Mute to Vol/Mute, and 10V to 10V).
2. Use jumper wires to connect the Vol/Mute pins of the first amplifier to the Vol/Mute pins of each successive
amplifier.
3. Use jumper wires to connect the Ground pins of the first amplifier to the Ground pins of each successive
amplifier.
Extron
VCM 110 AAP
V C G
10V
50mA
REMOTE
Figure 9.
V C G
10V
50mA
REMOTE
V C G
10V
50mA
REMOTE
VOL/MUTE
10V
Extron
MPA 152 Plus
daisy chain
Regulating Multiple Amps with a Single Remote Wiring Example
NOTE: The 10V pin of the remote controller connects to the first MPA 152 Plus only. There are no jumper
wires linking it to subsequent amplifiers.
MPA 152 Plus • Operation
10
Control Options
2
Extron
MLC Plus 84 D
Relay
DISPLAY
RS-232
MediaLink Plus
Controller
Decorator Wallplate
PC
OFF
ON
VOLUME
LAPTOP
IR
DOC CAM
AUTO IMAGE
HDMI
A/V MUTE
VGA
E xtron
WiFi
RS-232
1 2 3 4
Laptop
DisplayPort
to HDMI
Adapter
Document
Camera
esc
~
`
F1
F2
!
1
F3
@
2
Q
tab
R
D
X
F6
%
5
E
S
Z
F5
$
4
W
A
caps lock
shift
F4
#
3
*
8
Y
G
V
F8
&
7
T
F
C
F7
^
6
U
H
B
F11
_
-
O
K
M
F10
)
0
I
J
N
F9
(
9
{
[
P
:
;
L
<
,
F12
+
=
>
.
}
]
“
‘
?
/
F13
delete
|
\
return
shift
F14
F15
fn
home
page
up
delete
end
page
down
F16
F17
clear
7
4
1
F18
=
/
Ethernet/PoE
Microphones
1 and 2
F19
*
8
9
-
5
6
+
2
3
alt
control
option
command
command
option
control
0
.
enter
Audio
PC
HDMI with
Embedded
Audio
TCP/IP
Network
Blu-ray Player
STANDBY/ON
PQLS
HDMI
OPEN/CLOSE
FL OFF
USB
VGA
HDMI with
Embedded
Audio
Ethernet
Audio
Audio
Audio
Extron
IN1606
1
VGA
Laptop
100-240V ~ 50/60 Hz
-- A MAX
Scaling
Presentation
Switcher
IN1606
INPUTS
1
2
3
CONFIGURABLE
OUTPUTS
5
AUDIO INPUTS
HDMI
6
REMOTE
A
L
4
OUTPUTS
B
HDMI
HDMI
L
1
2
R
R
L
L
3
4
R
R
L
5
L
1
R
6
R
1
+48V MIC/LINE
2
2
VOLUME
LAN
VARIABLE
L
R
RS-232
RESET
+48V
Tx Rx G
MUTE
Extron
Extro
VCM 200 D
Volume and
Volum
Mute Controller
Decor
Decorator Wallplate
Audio
Screen Control
MPA 152 Plus
HDMI
OUTPUTS
Projector
8Ω / 4Ω
CLASS 2
WIRING
R
L
Extron
MPA 152Plus
L
L
Audio
R
R
V C G
10V
REMOTE
INPUTS
POWER
12V
0.7A MAX
50mA
Audio
Power Amplifier
Extron
SM 3
Surface Mount
Speakers
Figure 10.
Direct and Indirect Remote Control Options
1 Direct Remote Control — For a system designed to control the volume of the amplifier directly, use a 10k
Ohm potentiometer to control volume via the rear panel remote port on the MPA 152 Plus (see figure 2, G
on page 4). In figure 10 above, a VCM 200 D adjusts the level on the MPA 152 Plus directly. Follow
instructions found in the control product user guide.
2 Indirect Remote Control — For a system with variable audio output, connect the audio source output to the
input of the MPA 152 Plus. In figure 10 above, an MLC Plus 84 D adjusts the audio level on the audio source
via a network connection. Follow the instructions in the control product user guide.
NOTE: The diagram above is for illustrative purposes only. Only one type of remote control (direct or
indirect) should be used to control the volume in any given system.
Defeating the Auto Power-down Timer
The auto power-down timer determines whether or not the amplifier enters standby mode. The amplifier powers
down if the input signal remains below the input signal detection threshold for about 25 minutes.
The timer resets whenever the input signal exceeds the input signal detection threshold. Resetting the timer starts
a new 25-minute countdown until the amplifier powers down. Resetting the timer also causes an amplifier that is
already powered down to “wake up.”
MPA 152 Plus • Operation
11
There may be times when it is desirable to bypass the auto power-down timer. However, this should be done as a
last resort. Examples of when defeating the auto power-down circuit might be required include:
•
If the amplifier is used in a paging system. When the amplifier has already powered down, the first syllable
might be cut off as the amplifier wakes up from standby mode.
•
If the input signal is so quiet that the level remains below the input signal detection threshold for 25 minutes,
the timer would cut the audio in the middle of playback by placing the amplifier into standby mode.
ATTENTION:
•
The following procedure cannot be reversed and should be carried out as a last resort. Be certain
that you need to defeat the auto power-down timer before continuing.
•
La procédure qui suit est irréversible et doit être effectuée en dernier recours. Veuillez désactiver le
temporisateur de mise hors tension automatique avant de continuer.
To defeat the auto power-down timer, follow these instructions:
1. Disconnect power from the amplifier.
2. Remove the four screws that secure the top enclosure to the bottom enclosure (there are two screws on each
side of the enclosure).
ATTENTION:
•
Exercise caution when removing the screws to avoid stripping the screw heads.
•
Soyez prudent en retirant les vis afin d’éviter d’abîmer les têtes de vis.
3. Slide the top enclosure forward to clear the switch and potentiometers on the front panel, then lift it straight up
to separate it from the bottom enclosure.
The circuit boards are now exposed at the front.
ATTENTION:
•
Do not touch the electronic components or connectors without being electrically grounded. Handle
circuit boards by their edges only. Electrostatic discharge (ESD) can damage equipment, although
you may not feel, see, or hear it.
•
Ne pas toucher les composants électroniques ou les connecteurs sans être électriquement relié à
la terre. Manipuler les circuits imprimés en les tenant seulement par leurs bords. Les décharges
électrostatiques (ESD) peuvent endommager l’équipement, même si vous ne pouvez pas le sentir,
le voir ou l’entendre.
4. Identify resistor R42 at the front of the
bottom circuit board between the
STEREO to DUAL MONO toggle switch (to
the left) and the LEVEL potentiometer
(to the right). The resistor is shown in
the white box in figure 11.
5. Remove the resistor using a pair of
diagonal cutters to clip the wires
attaching it to the circuit board.
6. Re-attach the top enclosure with the
four screws removed in step 1.
Stereo to Dual Mono
Toggle Switch
Level Potentiometer
Resistor R42
Figure 11.
Front View, Showing the Location of Resistor R42
MPA 152 Plus • Operation
12
Troubleshooting
Under different circumstances, the front panel LED lights green or amber, which provides diagnostic information.
Amplifier Fails to Exit Standby Mode Promptly
Power LED Color
Problem Description
Problem Solution
Amber
No output signal
•
No input detected: verify that there is an input
signal. If a signal is present, raise the input
level.
•
The amplifier is in standby mode and the
output has been turned off. Check the remote
port.
Green or Amber
Slow to exit standby mode when a The input signal may be too weak. Raise the input
signal is present
level.
Amber
DC Fault is detected on either
channel. The unit does not exit
standby
DC Fault may have been detected. Disconnect
power then disconnect the remote port (if
connected). Next, reconnect power to the unit to
determine if the unit immediately goes into standby
upon power up. In such a case, the unit should be
serviced.
Amplifier Enters Standby Mode Too Early
Power LED Color
Problem Description
Problem Solution
Green or Amber
Enters Standby mode early
The input signal may be too weak. Raise the input
level.
MPA 152 Plus • Mounting
13
Mounting
This section provides information about the various ways to mount the MPA 152 Plus and covers the following
topics:
•
Plenum Placement
•
UL Guidelines for Rack Mounting
•
Tabletop Placement
•
Under-Desk, Through-Desk, and Projector Mounting
Plenum Placement
The MPA 152 Plus amplifier is plenum rated for heat and smoke release. It can be installed in the ceiling, out of
sight, with reduced risk of theft.
ATTENTION:
•
Although the amplifier is plenum rated, the power supply provided with it is not. Cables to and from the
amplifier must also be plenum rated. The power supply must not be placed in the plenum space. The
DC power cord provided with the unit is not plenum rated.
•
Bien que l’amplificateur soit conforme à la norme relative aux faux plafonds, la source d’alimentation
fournie avec ne l’est pas. Les câbles depuis et vers l’amplificateur doivent aussi être classés plenum.
La source d’alimentation ne doit pas être placée dans l’espace plenum. Le cordon d’alimentation DC
fourni avec l’unité n’est pas classé plenum.
Tabletop Placement
Attach the four provided rubber feet to the bottom of the unit and place it on a convenient tabletop location.
UL Guidelines for Rack Mounting
The following Underwriters Laboratories (UL) guidelines pertain to the installation of the PowerCage 411
enclosure into a rack:
CAUTION: Risk of minor personal injury:
• Elevated operating ambient temperature — If the equipment is installed in a closed or multi-unit
rack assembly, the operating ambient temperature of the rack environment may be greater than room
ambient. Therefore, consider installing the equipment in an environment compatible with the maximum
ambient temperature (Tma) specified by Extron.
• Reduced air flow — Install the equipment in the rack so that the amount of air flow required for safe
operation of the equipment is not compromised.
• Mechanical loading — Mount the equipment in the rack so that uneven mechanical loading does not
create a hazardous condition.
• Circuit overloading — When connecting the equipment to the supply circuit, consider the connection
of the equipment to the supply circuit and the effect that circuit overloading might have on overcurrent
protection and supply wiring. Consider equipment nameplate ratings when addressing this concern.
• Reliable earthing (grounding) — Maintain reliable grounding of rack-mounted equipment. Pay
particular attention to supply connections other than direct connections to the branch circuit (such as the
use of power strips).
MPA 152 Plus • Mounting
14
Consignes UL pour le montage en rack
Les consignes UL (« Underwriters Laboratories ») suivantes concernent l’installation en rack d’un boîtier
PowerCage 411 :
ATTENTION : Risque de blessure mineure :
• Température ambiante élevée — En cas d’installation de l’équipement dans un rack fermé ou composé
de plusieurs unités, la température du rack peut être supérieure à la température ambiante. Par
conséquent, il est préférable d’installer l’équipement dans un environnement qui respecte la température
ambiante maximale (Tma) spécifiée par Extron.
• Réduction du flux d’air — Si l’équipement est installé dans un rack, veillez à ce que le flux d’air
nécessaire pour un fonctionnement sécurisé de l’équipement soit respecté.
• Charge mécanique — Installez l’équipement en rack de manière à éviter toute situation dangereuse
causée par le déséquilibre de la charge mécanique.
• Surcharge électrique — Lorsque vous connectez l’équipement au circuit d’alimentation, observez la
connexion de l’équipement et étudiez les effets possibles d’une surcharge du circuit sur les protections
contre les surintensités et les conducteurs d’alimentation. Consultez à cet égard les indications de la
plaque d’identification de l’équipement.
• Mise à la terre — Assurez-vous que l’équipement est correctement mis à la terre. Accordez une
attention particulière aux connexions électriques autres que les connexions directes au circuit de
dérivation (ex. : les multiprises).
1.44"
Hole for Rack
Mounting Screw
(#4-40 Thread)
3.67"
Hole for Rack
Mounting Screw
(#4-40 Thread)
5
Points for Securing the Base of the MPA 152 Plus to a Rack
ATTENTION:
•
Use only the two holes indicated in the diagram above for mounting the MPA 152 Plus. The other four
holes anchor stand‑offs for the internal circuit boards. Using them may damage the amplifier and will
not provide secure mounting for the unit.
•
Utilisez uniquement les deux trous indiqués dans le schéma ci-dessus pour monter le MPA 152 Plus.
Les quatre autres trous fixent des entretoises pour les circuits imprimés internes. Leur utilisation
pourrait endommager l’amplificateur et n’offira ainsi aucune solution de montage sécurisé de l’unité.
MPA 152 Plus • Mounting
15
Under-Desk, Through-Desk, and Projector Mounting
The MPA 152 Plus can be mounted under a desk, through a desk, or above a projector. For the appropriate
mounting kit, go to www.extron.com. Follow the instructions provided with each kit.
Best Practices for Cleaning Your Extron Products
Plastic surfaces and cosmetic finishes can be damaged by long term
exposure to chemicals. Therefore, if it becomes necessary to clean your
Extron MPA 152 unit, Extron recommends the following guidelines when
cleaning.
All Extron products can be safely cleaned with:
•
70% concentration or higher isopropyl alcohol
•
Disinfectant cleaners that:
•
Are non-ammonium based (for example, contains no ammonium
chloride)
•
Contain 2% or less sodium hypochlorite (for example, 2% bleach,
98% water)
Regardless of the device, it is important to follow these general guidelines when cleaning:
1. If possible, unplug the device.
2. Spray the cleaner on a lint-free cloth until the cloth is damp.
3. Do not spray the cleaner directly onto the product.
4. Gently clean the product surface using the cloth.
Your health and safety are our top priority. Keeping devices clean, especially those in high-traffic environments
and high-use applications, is a crucial step in minimizing the spread of infections. Please contact us if you have
any questions about these guidelines outlined on this card or if you have a question about cleaning a specific
Extron the product.
MPA 152 Plus • Mounting
16
MPA 152 Plus • Mounting
17
Extron Warranty
Extron warrants its powered products against defects in materials and workmanship for a period
of three years from the date of invoice. In the event of malfunction during the warranty period, Extron
will repair or replace a product to whatever extent it shall deem necessary to restore the product to
proper operating condition.
This Limited Warranty does not apply if the fault has been caused by misuse, improper handling care, electrical
or mechanical abuse, abnormal operating conditions or non-Extron authorized modification to the product. Extron
Electronics makes no further warranties either expressed or implied with respect to the product and its quality,
performance, merchantability, or fitness for any particular use. In no event will Extron Electronics be liable for direct,
indirect, or consequential damages resulting from any defect in this product even if Extron Electronics has been
advised of such damage. Please note that laws vary from state to state and country to country, and that some
provisions of this warranty may not apply to you.
Powered Warranty Exception
Everlast™ Power Supplies — Extron warrants Everlast power supplies against any defects in materials and
workmanship for a period of seven years from the date of invoice. In the event of a malfunction during the warranty
period, Extron will repair or replace the power supply to its original operating condition. Extron engineers will examine
the returned product and determine whether the Everlast Power Supply Warranty or Powered Product Warranty
applies.
Speakers — Extron warrants Flat Field®, SoundField®, SpeedMount®, Column Array, and System INTEGRATOR®
speakers against any defects in materials and workmanship for a period of five years from the date of invoice.
Touchscreens — Extron warrants touchscreen display and overlay components against any defects in materials and
workmanship for a period of one year from the date of invoice.
Annotator 300 — Extron warrants the Annotator 300 against any defects in materials and workmanship for a period
of five years from the date of invoice.
Non-Powered Warranty Exception
Cable Cubby, Hideaway Surface Access Enclosures and Retractors — Extron warrants Cable Cubby cable
access enclosures, HSA Hideaway Surface Access enclosures, and Retractor cable retraction modules for a period of
three years from the date of invoice.
Active Cables and Active Adapters — Extron warrants active cables and active adapter cables for a period of three
years from the date of invoice.
Cable Termination Tools and Dies — Extron warrants cable termination tools for a period of three years from the
date of invoice, excluding the die.
Return Information
Units must be returned insured, with shipping charges prepaid. If not insured, you assume the risk of loss or damage
during shipment. Returned units must include the serial number and a description of the problem, as well as the name
of the person to contact in case there are any questions.
NOTE: To assure the highest level of service, a return authorization number must be obtained from Extron before
products are returned for service. Products must be shipped to Extron, prepaid along with proof of purchase
only after obtaining a Return Authorization (RA) number from the Extron Customer Support department.
Please contact Extron to receive an RA (Return Authorization) number:
USA:
Europe:
714.491.1500 or 800.633.9876
Asia:
Information
31.33.453.4040 Contact
or 800.3987.6673
Japan:
Africa and Middle East:
65.6383.4400
81.3.3511.7655
971.4.299.1800
Worldwide Headquarters: Extron USA West, 1025 E. Ball Road, Anaheim, CA 92805, 800.633.9876
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