Owner’s Manual
Nº436
Nº434
Important Safety Instructions
1. Read these instructions
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus
that produces heat.
9. 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 third prong is provided for safety. If the provided plug
does not fit into the outlet, consult an electrician for replacement of the obsolete outlet.
10. The MAINS cord is intended to be the safety disconnect device for this apparatus. Ready access
to the MAINS cord shall be maintained at all times.
11. Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles, or the point where it exits from the apparatus.
12. Only use attachments and accessories specified by the manufacturer.
13.
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/apparatus combination to avoid injury or tip over.
14. Unplug this apparatus during lightning storms or when unused for long periods of time.
15. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has
been damaged in any way, such as when the power cord or plug has been damaged; liquid has
been spilled or objects have fallen into the apparatus; or the apparatus has been exposed to
rain or moisture, does not operate normally, or has been dropped.
16. Ventilation should not be impeded by covering the ventilation openings with items such as
newspapers, table cloths, curtains, etc.
17. No naked flame sources, such as candles, should be placed on the apparatus.
18.
Terminals marked with this symbol may be considered HAZARDOUS LIVE and the
external wiring connected to these terminals requires installation by an INSTRUCTED
PERSON or the use of ready-made leads or cords.
Warning!
To reduce the risk of fire or electric shock, do not expose the apparatus to rain or moisture. Do
not place objects containing liquid, such as vases, on this apparatus.
FCC Notice
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 are designed to 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. 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
off and on, the user is 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 the receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
•
Consult an authorized Mark Levinson dealer or an experienced radio/TV technician for help.
Caution!
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Canada
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
3 Oak Park
Bedford, MA 01730-1413 USA
Telephone:
781-280-0300
Fax:
781-280-0490
www.marklevinson.com
Customer Service
Telephone:
781-280-0300
Sales Fax:
781-280-0495
Service Fax: 781-280-0499
Product Shipments
16 Progress Road
Billerica, MA 01821-5730 USA
Part No. 070-630430 | Rev 6 | 07/04
“Mark Levinson” and the Mark Levinson logo are registered trademarks
of Harman International Industries. U.S. patent numbers and other
worldwide patents issued and pending.
“Madrigal Audio Laboratories” and the Madrigal Audio Laboratories
logo are registered trademarks of Harman International Industries.
U.S. patent numbers and other worldwide patents issued and pending.
©2004 Harman Specialty Group. All rights reserved.
This document should not be construed as a commitment on the
part of Harman Specialty Group. The information it contains is
subject to change without notice. Harman Specialty Group assumes
no responsibility for errors that may appear within this document.
Introduction
Mark Levinson
Table of Contents
Introduction
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . .ii
FCC Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . .vi
Section 1: Getting Started
Special Design Features . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Massive Power Supply • Balanced Design • True Voltage Source •
Adaptive Bias • Extensive Protection
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Product Registration
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Placement • Rack-Mounting • Ventilation
iv
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Warm-up & Break-in Period • Operating States • Continuous
Operation
Section 2: Basic Operation
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Linking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Link Connections • Constructing Link Communication Cables •
Creating a Slave Chain • Link Controls
Section 3: Troubleshooting & Maintenance
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Care & Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Nº436/434
Introduction
Appendix
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Dimensions, Nº436 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4
Dimensions, Nº434 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-6
v
Introduction
Mark Levinson
Documentation
Conventions
This document contains general safety, installation, and operation
instructions for the Nº436/434 Power Amplifiers. It is important
to read this document before attempting to use these components.
Pay particular attention to safety instructions.
Appears on the component to indicate the
presence of uninsulated, dangerous voltages
inside the enclosure – voltages that may be
sufficient to constitute a risk of shock.
Appears on the component to indicate important
operation and maintenance instructions
included in the accompanying documentation.
Appears on the component to indicate
compliance with the EMC (Electromagnetic
Compatibility) and LVD (Low-voltage Directive)
standards of the European Community.
vi
Warning!
Calls attention to a procedure, practice,
condition, or the like that, if not correctly
performed or adhered to, could result in
personal injuries or death.
Caution!
Calls attention to a procedure, practice,
condition, or the like that, if not correctly
performed or adhered to, could result in
damage or destruction to part or all of the
component.
Note
Calls attention to information that is essential to
highlight.
Getting Started
Special Design Features
Thank you for purchasing the Nº436/434 Monaural Power
Amplifier, combining the massive power and strength of a large
power amplifier with the elegance and finesse of a small power
amplifier. This section describes some of the design features that
make this unique combination possible.
Massive Power Supply
The Nº436/434 uses a large, robust power supply with a highcapacity, low-noise toroidal transformer and four large, low ESR
(Equivalent Series Resistance) capacitors. Specifically, the Nº436
uses a 2372 VA transformer with 80,000µF total capacitance, while
the Nº434 uses an 801 VA transformer with 72,000µF total
capacitance.
Heavy, oxygen-free copper bus bars enhance the efficiency of
power distribution with the power amplifier, eliminating variances
caused by wiring harnesses, which are commonly found even in
high-performance power amplifiers. High-frequency power supply
bypass is accomplished on individual PC boards by five types of
components. As a result, a uniformly low power supply impedance is seen by various circuits within the power amplifier providing the foundation for a rare combination of massive power and
extraordinary finesse.
Balanced Design
A truly balanced input topology eliminates the need for an input
buffer amplification stage, allowing the source to directly drive
the first stage differential amplifier. Matched impedances are presented to the source as both signals travel identical circuit paths.
Meticulous attention to detail, including careful mirror-imaging of
circuits, minimizes magnetic field distortions that can be caused
by such a massive power delivery system. Balanced input signals
remain balanced throughout voltage gain stages, achieving rejection of common mode noise and distortion in the final, current
gain stage.
1-1
Getting Started
Mark Levinson
Special Design Features (continued)
True Voltage Source
The Nº436/434 operates as a true voltage source, maintaining the
appropriate voltage within its rated voltage output according to
the demands of the source material rather than the current
demands of the loudspeaker. As a result, the Nº436/434 doubles its
power output each time loudspeaker impedance is cut in half. For
example, the Nº436 offers rated power at 350W per channel at 8Ω
and 700W per channel at 4Ω.
To control the flow of its remarkable power capabilities to the
loudspeakers, the Nº436 uses 16 TO-3P output transistors in eight
matched, complementary pairs per channel. Similarly, the Nº434
uses eight TO-3P output transistors in four matched, complementary pairs per channel.
Although most loudspeakers cannot absorb the continuous full
power capabilities of the Nº436, many high-quality loudspeakers
require extreme short-term power levels when reproducing music
at realistic levels. The Nº436/434 can meet these demands without
power supply “sag” or sonic performance alterations, allowing
either power amplifier to reproduce music with amazing authority
and control. Power needs depend on listening habits, the listening
room, and associated loudspeakers.
1-2
Adaptive Bias
Extensive Protection
The Nº436/434 uses a proprietary adaptive biasing scheme to
deliver the advantages of a Class A output stage without the associated thermal management problems and sonic compromises.
This unique adaptive biasing scheme does not allow output
devices to be reverse-biased, replacing dynamic distortions with a
sweeter sound that provides a greater sense of ease regardless of
volume level. Contact an authorized Mark Levinson dealer for
additional information about Adaptive Bias.
Designed to prevent damage to itself and associated components,
the Nº436/434 is armed with several protective features. For
example, the AC input to each transformer is fused to protect
against excessive current conditions that occur when shorted
outputs are driven. Inrush limiting prevents premature aging of
power supply components during power cycles, switching off-line
once the power supply is charged. And, a controlled-clipping
circuit prevents output devices from saturating, using wave-shaping
action to avoid the harsh, high-frequency harmonics generated by
hard-clipped output devices.
Nº436/434
Getting Started
In addition, the Nº436/434 uses state-of-the-art protections to
guard against the following fault conditions:
•
Signal-related faults, including the presence of DC (direct
current) signals at the output and demands for excessive
current at the output (indicating a short-circuit). If a signalrelated fault is detected, the front panel indicator LED blinks
rapidly, remaining lit and unlit for equal intervals. The
Nº436/434 shuts itself down to protect itself and associated
loudspeakers. To restore normal operation, remove the source
of the fault. Then, power cycle the Nº436/434 using the
power button.
•
Power-related faults, including over or under-voltage (±10%)
conditions at the ~ac mains connector. If AC mains voltage is
too high or too low for safe operation, the front panel indicator
LED blinks rapidly, remaining lit for longer intervals. Normal
operation will not be restored until AC mains voltage falls
back into a safe operating range.
For example, a 120V model of the Nº436/434 will operate
from approximately 108-132V, while a 240V model of the
Nº436/434 will operate from approximately 216-264V. Outside
of these limits, the Nº436/434 will activate sleep mode. When
AC mains voltage returns to the safe operating range, the
Nº436/434 can be taken out of sleep mode using the standby
button.
•
Thermal-related faults, such as if the Nº436/434 becomes overheated. The front panel indicator LED blinks rapidly, remaining unlit for longer intervals. The Nº436/434
automatically activates sleep mode and remains in sleep
mode until output heat sink temperatures drop below 85˚C
(185˚F or 358K). When temperatures return to a safe operating
range, the Nº436/434 can be taken out of sleep mode using
the standby button.
1-3
Getting Started
Mark Levinson
Unpacking
Warning!
DO NOT attempt to lift or move the Nº436/434 without
adequate assistance. Failure to follow the procedures included
in this section may result in personal injuries and/or product
damage.
The Nº436 and Nº434 are massive power amplifiers. The Nº436
ships at 95 pounds (43.2kg) and the Nº434 ships at 65 pounds
(29.5kg). Rear panel handles are provided for safe, convenient
lifting and moving. Proper lifting requires at least two people.
Caution!
DO NOT attempt to lift the Nº436/434 from its packing carton
alone.
DO NOT attempt to lift the Nº436/434 while bending at the
waist. When lifting, stand as straight as possible using the leg
muscles to lift.
1-4
When unpacking the Nº436/434:
•
DO save all packing materials for possible future shipping
needs.
•
DO inspect the Nº436/434 for signs of damage during
shipment. If damage is discovered, contact an authorized
Mark Levinson dealer for assistance making appropriate
claims.
Product Registration
Please register the Nº436/434 within 15 days of purchase. To do
so, register online at www.marklevinson.com or complete and
return the included product registration card. Product registration
serves no warranty purposes. Retain the original, dated sales
receipt as proof of warranty coverage.
Installation Considerations
The Nº436/434 requires special care during installation to ensure
optimal performance. Pay particular attention to the precautions
included in this section and to other precautions included
throughout this owner’s manual.
Nº436/434
Getting Started
Placement
•
DO review “Important Safety Instructions” and “Power
Requirements” before installing the Nº436/434.
•
DO place the Nº436/434 on a solid, flat, level surface such as
a table, shelf, or floor OR bolt the Nº436/434 into a rackmounting system. Use a purpose-built rack-mounting system
to accommodate the weight of the power amplifier. Refer to
“Rack-Mounting” for additional information.
•
DO position the Nº436/434 close to associated loudspeakers
to keep loudspeaker wires as short as possible. Use longer
interconnecting cables between the preamplifier and the
power amplifier. This is preferable because interconnecting
cables pass low-voltage signals, which transmit over distances
with greater accuracy than the high-voltage signals required
by loudspeakers.
•
DO allow at least a 6-inch (15cm) clearance behind the
Nº436/434 for the power cord and signal cables to bend
without crimping or straining.
•
DO see “Dimensions” for assistance with custom installations.
•
DO NOT position the Nº436/434 near low-level components.
These power amplifiers are capable of producing massive
output currents, which could generate significant magnetic
fields that induce noise in some sensitive components.
•
DO NOT place the Nº436/434 on a windowsill or in another
location in which it will be exposed to direct sunlight.
Caution!
BEFORE moving the Nº436/434, make sure it is powered off
using the power button. Then, make sure the power cord is
disconnected from the ~ac mains connector and the electrical
outlet.
DO NOT attempt to move the Nº436/434 without adequate
assistance. Proper lifting requires at least two people.
Rack-Mounting
The Nº436/434 can be rack-mounted using the optional rackmount kit available at authorized Mark Levinson dealers. This
purpose-designed kit provides adequate support for the power
amplifier as well as proper ventilation for the heat sinks. When
rack-mounted, the Nº436 occupies four standard rack units and
the Nº434 occupies three standard rack units.
1-5
Getting Started
Mark Levinson
Ventilation
The Nº436/434 uses a sophisticated ventilation system that
combines passive convection and active, fan-driven cooling to
maintain normal operating temperatures under a wide range of
conditions. Heat sinks are crosscut to allow for both horizontal
and vertical airflow, ensuring that the Nº436/434 delivers
maximum performance and reliability at all times.
When the Nº436/434 is installed in a location with reasonable
temperatures and ventilation, convection cooling alone provides
adequate heat dissipation at low and moderate listening levels.
When operating temperatures exceed a certain level, two
temperature-controlled, variable-speed fans automatically activate
to provide additional cooling.
Note
The Nº436/434 fans are extremely quiet, even when running
relatively hard. In some cases, the fans may be heard when lowering
master volume after an extended period of high-volume listening.
When the Nº436/434 is taken out of standby, the fans will activate
momentarily to remove excess dust that may have accumulated in
the heat sinks.
1-6
•
DO select a dry, well-ventilated location out of direct sunlight.
•
DO NOT obstruct the ventilation holes on the top and bottom
of the Nº436/434 or reduce airflow through the Nº436/434.
•
DO NOT place the Nº436/434 on a thick rug or carpet or
cover the Nº436/434 with a cloth, as this might prevent proper
cooling. If the Nº436/434 is placed on the floor, use a thick
piece of tempered glass to provide firm support and proper
ventilation.
•
DO NOT expose the Nº436/434 to high temperatures,
humidity, steam, smoke, dampness, or excessive dust. Avoid
installing the Nº436/434 near radiators and other heatproducing appliances.
Nº436/434
Getting Started
Power Requirements
When shipped, the Nº436/434 is configured for 100V, 120V, 220V,
230V or 240V AC power operation at 50 or 60Hz based on the
country for which it is manufactured. Before operating the
Nº436/434, make sure the ~ac mains connector label indicates the
correct operating voltage for the current location.
Caution!
DO NOT attempt to adjust the operating voltage. Consult an
authorized Mark Levinson dealer if the operating voltage is
incorrect or if the operating voltage must be changed for
relocation purposes.
BE ADVISED that different operating voltages may require the
use of different power cords and/or attachment plugs. Contact
an authorized Mark Levinson dealer for assistance.
The Nº436/434 is capable of passing remarkable musical signals
regardless of signal and loudspeaker demands. On either an
instantaneous or continuous basis, these power amplifiers can
drive exceptional power levels into most all loudspeaker loads.
Depending on listening habits, loudspeaker demands, and the
number of power amplifiers present in the system – it is possible
for the electrical service to become the limiting performance
factor.
In this case, consider installing a dedicated AC circuit for the
home entertainment system. Contact a licensed electrician for
assistance. If more than one AC circuit is providing power to the
system, contact a licensed electrician to ensure that all components
are operating with the same solid, low-impedance ground reference.
Note
Warm-up & Break-in
Period
Building regulations and electrical codes differ from location to
location, making it impossible to anticipate the requirements of highcurrent AC circuits such as the Nº436/434 is capable of using.
Contact a local, licensed electrician for information.
Although the Nº436/434 delivers superior performance from the
first time it is powered on, this performance will continue to
improve as the power amplifier reaches its normal operating
temperature and various components “break in.” The greatest
performance improvements will occur within the first 25 to 50
hours of use. Sound quality will continue to improve for about
300 hours.
1-7
Getting Started
Mark Levinson
Warm-up & Break-in Period (continued)
After this initial period, performance will remain consistent unless
power is disconnected from the Nº436/434. Power is considered
disconnected when the Nº436/434 is powered off using the power
button; the power cord is disconnected from the ~ac mains
connector or the electrical outlet; or an extended power failure or
power outage occurs. Power is not disconnected when the
Nº436/434 is in standby or sleep mode.
When power returns, it is recommended to allow the Nº436/434
and other audio components to stabilize for about 2 minutes. The
Nº436/434 will require a brief warm-up and break-in period (not
the full 300 hours).
Operating States
The Nº436/434 has four operating states:
1. Off
Power is considered disconnected from the Nº436/434.
1-8
2. Sleep Mode
Power is connected to a small power supply, communication
circuits, and control circuits. When taken out of sleep mode,
the Nº436/434 requires a brief warm-up and break-in period.
In sleep mode, the Nº436/434 consumes less than 15W of
power.
3. Standby
Power is connected to the main power supply and voltage
gain stages. Power is not connected to the output (current
gain) stage. Because voltage gain stages are kept at their normal
operating temperatures, the Nº436/434 remains warmed-up to
deliver an optimal performance. In standby, the Nº436/434
consumes about 100W of power (±5%).
4. On
Power is connected to the Nº436/434.
Nº436/434
Getting Started
Note
The Nº436 and Nº434 are designed to run somewhat warm without
causing a safety hazard. The Nº436 dissipates about 175W of heat
energy when powered on or idle (not in standby), and the Nº434
dissipates about 130W of heat energy when powered on or idle (not
in standby).
Continuous Operation
The Nº436/434 should be unplugged during lightning storms and
extended periods of non-use. Otherwise, it is designed for continuous
operation. For best performance, make sure power is connected to
the Nº436/434 at all times. During normal operation, do not use
the power button to power off the Nº436/434. Instead, use the
standby button to place the Nº436/434 into standby, which
allows the power amplifier to remain warmed-up to deliver optimal performance at all times.
1-9
Basic Operation
MONO AMPLIFIER
Nº436
standby
power
3
1
2
2-1
Front Panel
The numbers in the front panel illustration shown above correspond
with the numbered items in this section.
1. Power Button
Powers the Nº436/434 on and off when the power cord is
connected to the ~ac mains connector and an electrical
outlet.
Note
•
When the Nº436/434 is powered on, pressing the power
button disconnects power from the Nº436/434.
•
When the Nº436/434 is powered off, pressing the power
button connects power to the Nº436/434. The Nº436/434
automatically enters sleep mode when powered on.
The Nº436/434 must be powered on using the power button to
respond to remote trigger commands.
Basic Operation
Mark Levinson
Front Panel (continued)
2. standby button
Places the Nº436/434 into standby or sleep mode and takes
the Nº436/434 out of standby or sleep mode.
•
•
When the Nº436/434 is powered on, pressing the standby button places the Nº436/434 into standby or takes the Nº436/434
out of standby, allowing it to remain warmed-up to deliver an
optimal performance at all times.
Pressing and holding the standby button for four seconds places
the Nº436/434 into sleep mode. When the Nº436/434 is in
sleep mode, pressing the standby button takes the Nº436/434
out of sleep mode. When taken out of sleep mode, the
Nº436/434 automatically enters standby.
3. indicator LED
Indicates the operating state of the Nº436/434 and provides
diagnostic information if a fault condition occurs. The table
below describes all indicator LED behaviors.
2-2
See “Extensive Protection” for additional information about
fault conditions. If the Nº436/434 will not power on at all
(even to sleep mode), examine ~ac mains connections or
have an authorized Mark Levinson dealer inspect the internal
fuses (which are not user-serviceable).
LED Behavior
Description
Fully lit
Indicates that power is connected to
the Nº436/434 (on).
Slowly blinking
Indicates that the Nº436/434 is in
standby.
Dimly lit
Indicates that the Nº436/434 is in
sleep mode.
Unlit
Indicates that power is disconnected
from the Nº436/434 (off).
Rapidly blinking
Indicates that a power-related fault
has occurred.
(lit for longer intervals)
Rapidly blinking
(lit/unlit for equal intervals)
Rapidly blinking
(unlit for longer intervals)
*
Indicates that a signal-related fault*
has occurred.
Indicates that a thermal-related fault
has occurred.
Signal-related faults include significant DC offsets at the output due to either
DC in the input signal or a failed component within the amplifier OR excessive
current demands due to a short-circuited loudspeaker wire.
Nº436/434
1
Basic Operation
3
2
4
5
6
7
8
9
trigger
in
~ ac mains
1
MA R K LEVINSON
MONO AMPLIFIER Nº 436
S/N
inputs
communication
2
1
slave in slave out
RS-232
trigger
out
Rear Panel
The numbers in the rear panel illustration shown above correspond
with the numbered items in this section.
Caution!
Never make or break connections to the Nº436/434 unless it
and all associated components are powered off and disconnected
from electrical outlets. Before making connections to the Nº436/
434, make sure the associated preamplifier master volume is set
to a reasonable level.
1. rear panel handles
Allow for safe, convenient lifting and moving of the Nº436/
434. Refer to “Unpacking” for additional information.
Caution!
DO NOT attempt to lift the Nº436/434 from its packing carton
alone.
DO NOT attempt to lift the Nº436/434 while bending at the
waist. When lifting, stand as straight as possible using the leg
muscles to lift.
2-3
Basic Operation
Mark Levinson
Rear Panel (continued)
2. fan outlet
Provides an outlet for active, fan-driven cooling. A 1/4-inch
(6.4mm) inlet between the front panel and the chassis provides
air intake for the forced-air cooling system. See “Ventilation”
for additional information.
3. loudspeaker binding posts (main outputs)
Provide audio output. Two custom-made, gold-plated, highcurrent binding posts labeled + (positive) and – (negative) are
available. In general, positive binding posts are red and
negative binding posts are black.
Caution!
NEVER connect power amplifier outputs to any component
other than a loudspeaker.
NEVER short-circuit power amplifier outputs.
NEVER connect power amplifier outputs to another power
amplifier’s outputs.
2-4
For best performance, use high-quality loudspeaker cables. To
connect these cables, use a high-quality spade or hook lug
soldered to the cable or crimped to the cable with extremely
high pressure.
•
Connect the + (positive) binding post on the Nº436/434
to positive input on the associated loudspeaker.
•
Connect the – (negative) binding post on the Nº436/434
to negative input on the associated loudspeaker.
Spade Lug
Hook Lug
Nº436/434
Basic Operation
Caution!
DO NOT OVER-TIGHTEN the Nº436/434 binding posts. The
innovative design of these binding posts provides more leverage
than more traditional designs. Tight, high-contact pressure
connections can be achieved with finger-tightening. Special
tools are not needed.
DO NOT FORCE the Nº436/434 binding post “wings” up and
over a bent or oversized connector. Doing so may result in
binding post damage. If the connector obstructs “wing”-turning,
slide it into place when the binding post opening provides a
snug fit. Then, use quarter-turns to tighten the connection as
needed.
4. balanced input connector
Provides balanced audio input. One female XLR connector is
available to accept balanced input signals from an associated
preamplifier.
Balanced Input Connector
PUSH
Pin 2
signal + (non-inverting)
Pin 1
signal ground
Pin 3
signal – (inverting)
For best performance, use balanced connections whenever
possible. Refer to the illustration shown to the left and to the
associated preamplifier documentation to ensure that
Nº436/434 XLR input pin assignments correspond to the associated preamplifier XLR output pin assignments. If not, wire
the cable so that the appropriate input pin connects to the
appropriate output pin.
connector ground lug: chassis ground
Note
When the Nº436/434 is shipped, shorting-straps are installed
between pins 1 and 3 of the balanced input connector. These
shorting-straps must be REMOVED when balanced connections
are made. These shorting-straps must be INSTALLED when
unbalanced connections are made. Installing the shorting-straps
reduces the chance of noise at the (otherwise un-terminated) inverting
balanced input connector.
5. unbalanced input connector
Provides unbalanced audio input. One RCA connector is
available to accept unbalanced input signals from an associated
preamplifier. These signals are converted to balanced signals
upon receipt, and processed as balanced signals thereafter. If
the associated preamplifier does not support balanced
connections, connect the RCA output on the preamplifier to
the RCA connector on the Nº436/434.
2-5
Basic Operation
Mark Levinson
Rear Panel (continued)
6. Link communication ports
Provide “links” to compatible Mark Levinson preamplifiers
and power amplifiers, allowing the Nº436/434 to share Link
controls with these components. Two 6-pin modular RJ-11
jacks labeled slave in and slave out are available.
The slave in communication port can be connected to a
compatible Mark Levinson preamplifier or power amplifier,
and the slave out communication port can be connected to a
compatible Mark Levinson power amplifier.
Note
Refer to “Linking” BEFORE linking the Nº436/434 to other Mark
Levinson components.
7. RS-232 port
Provides serial control. One connector labeled RS-232 is available.
2-6
8. trigger input & output connectors
Provide DC trigger control. One 1/8-inch mini-jack labeled
trigger in is available to receive 12 or 5V DC signals from a
connected component, and one 1/8-inch mini-jack labeled
trigger out is available to pass these signals along to a
connected power amplifier. The illustration to the left shows
tip polarity requirements.
Mini-plug Tip Polarity
5 to 12V, positive tip polarity
Connect the trigger input connector on the Nº436/434 to the
trigger output connector on a compatible component.
Toggling the connected component between on and standby
will toggle the Nº436/434 between on and standby.
Connect the trigger output connector on the Nº436/434 to
the trigger input connector on a compatible power amplifier.
The Nº436/434 will pass incoming trigger signals along to the
connected power amplifier, creating a “daisy-chain” of trigger
control.
Nº436/434
Basic Operation
9. ~ac mains connector
Provides power to the Nº436/434 through the supplied power
cord when the supplied power cord is connected to the ~ac
mains connector and an electrical outlet. One IEC-standard
AC mains receptacle labeled ~ac mains is available.
Note
Before operating the Nº436/434, make sure the ~ac mains connector
label indicates the correct operating voltage for the current location.
Warning!
The Nº436/434 has been safety-tested and designed for operation
with a three-conductor power cord. Do not defeat the “third
pin” or “earth ground” of the power cord.
The Nº436/434 includes internal fuses as a final stage of
protection. The protection circuitry is designed so that only a
catastrophic failure will cause these fuses to blow. If this
occurs, disconnect the power cord from the Nº436/434 ~ac
mains connector and the electrical outlet. Then, contact an
authorized Mark Levinson dealer for assistance. DO NOT
attempt to replace the fuse. There are no user-serviceable
parts within the Nº436/434.
Warning!
Potentially dangerous voltages and current capabilities exist
within the Nº436/434, even when power is disconnected. DO
NOT attempt to open the power amplifier’s chassis. There are
no user-serviceable parts inside the power amplifier. Refer all
servicing to an authorized Mark Levinson dealer.
2-7
Basic Operation
Mark Levinson
Linking
Linking is available for all Mark Levinson components with Link
or
communication ports, including master, slave in, and
slave out communication ports. These communication ports
“link” compatible Mark Levinson components in a slave chain,
allowing them to share Link controls.
The Nº436/434 offers two Link communication ports labeled slave
in and slave out. The slave in communication port can be
connected to a compatible Mark Levinson preamplifier or power
amplifier, and the slave out communication port can be connected
to a compatible Mark Levinson power amplifier.
The Nº436/434 can be connected to:
•
Nº30 Series preamplifiers, including the Nº32, Nº38, and
Nº38S.
•
Nº300 Series preamplifiers, including the Nº320S, Nº326S,
Nº380, and Nº380S.
•
Nº400 Series power amplifiers, including the Nº431 and
Nº432.
•
Nº39 and Nº390S CD Processors.
•
Refer to the appropriate owner’s manual for Link compatibility
information about other Mark Levinson components.
•
DO use Link or
communication ports, such as master,
slave in, and slave out communication ports. DO NOT use
RS-232 ports or other rear panel connectors.
•
DO use Link communication cables, which are available at
2-8
Link Connections
authorized Mark Levinson dealers.
•
DO use constructed Link communication cables. See
“Constructing Link Communication Cables” for additional information.
Caution!
Link connections must be made using Link communication ports
and Link communication cables. Connections made using other
connectors or cables may damage the Nº436/434 and other
linked components, possibly voiding the manufacturer’s warranty
and/or standard repair policies.
Nº436/434
Basic Operation
Constructing Link
Communication Cables
Note
Link communication cables can be constructed using an
8-conductor modular telephone cable with the appropriate plug
crimped on each end.
•
Use an 8-pin RJ-45 plug when connecting to a preamplifier.
RJ-45 plugs provide an 8-pin connection.
•
Use a 6-pin RJ-11 plug when connecting to the Nº436/434 or
another power amplifier. RJ-11 plugs provide a 6-pin connection
in which connector pins 7 and 8 are not used.
BEFORE making Link connections, refer to the appropriate
owner’s manual for Link or
communication port specifications
for other Mark Levinson components.
When linking components with constructed Link communication
cables, twist the cable 180˚ as shown in the illustration below for
a straight-through (pin 1-to-pin 1) connection.
Constructed Link Cables
Nº436/434
Power Amplifier
Mark Levinson
Preamplifier
6-Pin RJ-11 Plug (Pin 1)*
8-Pin RJ-45 Plug (Pin 1)
Locking Tab
180˚ Twist
Locking Tab
Mark Levinson
Power Amplifier
Nº436/434
Power Amplifier
6-Pin RJ-11 Plug (Pin 1)*
6-Pin RJ-11 Plug (Pin 1)*
Locking Tab
180˚ Twist
Locking Tab
*Pins 7 and 8 are not used
Creating a Slave Chain
Making Link connections creates a slave chain that facilitates
communication among linked components, allowing them to
share Link controls.
Slave chains that include the Nº436/434 must include:
•
Compatible Mark Levinson components. The Nº436/434 is
compatible with the components listed on the previous page.
Refer to the appropriate documentation for Link compatibility
information about other Mark Levinson components.
•
Components connected in a certain order to prevent
communication from terminating. Power amplifiers such as
the Nº436/434 must be the last component in a slave chain.
2-9
Basic Operation
Mark Levinson
Creating a Slave Chain (continued)
Note
The slave chains in this section include preamplifiers and power
amplifiers. However, slave chains can also include digital audio
processors and digital transports. Refer to the appropriate owner’s
manual for information about including these Mark Levinson
components in a slave chain.
The table below indicates slave chain requirements for preamplifiers
and power amplifiers.
Component
Slave Chain Requirements
Preamplifier
• No maximum number per slave chain.
(e.g., Nº320S)
• Connect the slave out communication port on the
preamplifier to the slave in communication port on
the first power amplifier.
Power Amplifier
(e.g., Nº436/434)
• Maximum of six per slave chain.
• Connect the slave in communication port on the first
power amplifier to the slave out communication port
on the preamplifier.
• Connect up to six power amplifiers in a “daisy chain”
using slave in-to-slave out communication port
connections. The slave out communication port on
the last power amplifier is not connected.
2-10
Note
The Nº39 and Nº390S CD Processors can serve as either a digital
audio processor or a digital transport in a slave chain.
Note
Link and
communication port names differ among Mark
Levinson components. On some Mark Levinson power amplifiers, the
slave in communication port is labeled
input and the slave
out communication port is labeled
control. Refer to the
appropriate owner’s manual for Link and
communication
port names for specific Mark Levinson components.
To create a slave chain that includes the Nº436/434:
1. Make sure the Nº436/434 and all associated components are
powered off.
2. Connect the slave in communication port on the first power
amplifier to the slave out communication port on the
preamplifier.
Nº436/434
Basic Operation
Sample Slave Chain
Nº320S
Preamplifier
Step A:
Connect the
(slave out)
communication port on the preamplifier
to the slave in communication port
on the first power amplifier.
slave in slave out
Nº436
Power Amplifier
If desired, connect the slave out communication port on the
first power amplifier to the slave in communication port on
another power amplifier. Up to six power amplifiers can be
included in a slave chain using “daisy chain” slave in-to-slave
out communication port connections. The slave out
communication port on the last power amplifier is not
connected.
Step B:
Connect the slave out communication
port on the first power amplifier to the
slave in communication port on the
second power amplifier.
slave out slave in
Nº434
Refer to the table on the previous page and to the illustration
to the left for additional assistance.
Power Amplifier
Step C:
Connect the slave out communication
port on the second power amplifier to the
slave in communication port on a third
power amplifier. This step can be repeated
to include up to six power amplifiers in the
slave chain.
If no additional power amplifiers are included
in the slave chain, the last power amplifier
slave out communication port is not
connected.
3. When Link connections have been made, power on linked
components ONE AT A TIME in the order specified below.
Allow each component to complete its initialization sequence
before proceeding to the next component.
A. Digital Audio Processor
B. Digital Transports
C. Preamplifier
D. Power Amplifiers (begin with the first power amplifier in
the slave chain)
2-11
At this point, the front panel standby LEDs on all linked
components should be blinking in unison.
Note
To ensure proper functioning of Link controls, linked components
must be powered on ONE AT A TIME in the following order: digital
transport(s), then digital audio processor, then preamplifier, then
power amplifier(s). DO NOT use a power strip switch to power on
several components at once. When power is supplied to a power
strip, power is automatically supplied to connected components
without a power button.
4. Take the linked preamplifier out of standby.
•
All linked power amplifiers should come out of standby as
well. If this does not occur, repeat steps 3 and 4. If problems
persist, contact your authorized Mark Levinson dealer.
Basic Operation
Link Controls
Mark Levinson
Linking Mark Levinson components allows them to share Link
controls. The table below provides a general description of
controls the Nº436/434 shares with linked preamplifiers and
power amplifiers. Some controls may not be available for certain
component combinations. Other Mark Levinson components may
share additional controls. Refer to the appropriate Mark Levinson
owner’s manual for additional information.
Note the following:
•
To ensure proper functioning of Link controls, linked
components must be powered on ONE AT A TIME in the
following order: digital audio processor, then digital transport(s),
then preamplifier, then power amplifier(s).
•
Link controls must be enabled on each linked digital transport’s
linking menu, which allows activation and deactivation of
individual Link controls. Refer to the appropriate Mark
Levinson owner’s manual for additional information.
•
Some Mark Levinson digital transports accommodate a maximum
of four front panel display characters. In these cases, certain
input names appear abbreviated on the front panel display.
For example, an input named No320S will appear as No32 on
the digital transport front panel display even though the
input is associated with the Nº320S.
•
The linked preamplifier and power amplifier(s) must be in the
same standby-state to allow linked power amplifier(s) to enter
standby after a power failure.
2-12
Component
Link Control
Standby
Link
Preamplifier
• Placing the linked
preamplifier into standby
places all linked power
amplifiers into standby.
• Taking the linked
preamplifier out of
standby takes all linked
power amplifiers out of
standby.
Fault Condition
Link
Power Amplifier(s)
• Placing a linked power
amplifier into standby
places all other linked
power amplifiers into
standby.
• Taking a linked power
amplifier out of standby
takes all other linked
power amplifiers out of
standby.
• If a linked power amplifier experiences a fault condition,
it reports the fault condition to the linked preamplifier.
The power amplifier’s number and fault condition
code appear on the preamplifier’s front panel display.
• The power amplifier number refers to its position in
the slave chain. For example, AMP1 refers to the first
power amplifier in the slave chain.
• Power amplifier fault condition codes are listed below.
See “Extensive Protection” for additional information.
– HOT! indicates a thermal-related fault condition.
– DCO! indicates a signal-related fault such as an
uncorrectable DC offset.
Troubleshooting & Maintenance
Troubleshooting
Incorrect operation is sometimes mistaken for malfunction. If
problems occur, refer to this section for troubleshooting information.
If problems persist, contact your authorized Mark Levinson dealer.
1. No audio and the indicator LED is not lit.
Warning!
•
Examine ~ac mains connections to ensure the power cord
is connected to the ~ac mains connector and an electrical
outlet.
•
Make sure the Nº436/434 is powered on using the power
button.
•
Examine the electrical circuit breaker to ensure that power
is supplied to the electrical outlet to which the Nº436/434
is connected.
•
A power loss or power outage may have occurred. In this
case, power cycle the Nº436/434 using the power button,
waiting at least 10 seconds between powering the
Nº436/434 off and on.
•
A fuse may be blown inside the Nº436/434. In this case,
disconnect the power cord from the ~ac mains connector
and the electrical outlet. Then, contact an authorized
Mark Levinson dealer. DO NOT attempt to replace the
fuse. There are no user-serviceable parts within the
Nº436/434.
Potentially dangerous voltages and current capabilities exist
within the Nº436/434, even when power is disconnected. DO
NOT attempt to open the power amplifier’s chassis. There are
no user-serviceable parts inside the power amplifier. Refer all
servicing to an authorized Mark Levinson dealer.
3-1
Troubleshooting & Maintenance
Mark Levinson
Troubleshooting (continued)
2. No audio and the indicator LED is dimly lit.
•
The Nº436/434 is in sleep mode. To take it out of sleep
mode, press the standby button. The Nº436/434 will enter
standby.
•
A power loss or power outage may have occurred. In this
case, power cycle the Nº436/434 using the power button,
waiting at least 10 seconds between powering the
Nº436/434 off and on.
3. No audio and the indicator LED is slowly blinking.
•
The Nº436/434 is in standby. To take it out of standby,
press the standby button. The Nº436/434 will power on.
4. No audio and the indicator LED is rapidly blinking, remaining
lit for longer intervals.
•
Examine ~ac mains connections to ensure the power cord
is connected to the ~ac mains connector and an electrical
outlet.
•
Power cycle the Nº436/434 using the power button, waiting
at least 10 seconds between powering the Nº436/434 off
and on.
3-2
• Contact an authorized Mark Levinson dealer.
5. No audio and the indicator LED is rapidly blinking, remaining
lit and unlit for equal intervals.
•
A signal-related fault is present, probably either a DC
offset or an over-current condition. If this occurs:
a.
Power the Nº436/434 off using the power button.
b. Disconnect the input signal and loudspeaker wires.
c.
Wait 10 seconds.
d. Power the Nº436/434 on using the power button.
If the Nº436/434 powers on, repeat these steps, reconnecting
input signal and loudspeaker wires one at a time to
determine what is causing the fault. Remember to power
the Nº436/434 off using the power button before making
or breaking connections. If the Nº436/434 does not power
on, there is an internal failure. Contact an authorized
Mark Levinson dealer.
Nº436/434
Troubleshooting & Maintenance
6. No audio and the indicator LED is rapidly blinking, remaining
unlit for longer intervals.
•
A thermal-related fault is present, which causes the
Nº436/434 to enter sleep mode. Once the heat sinks have
cooled below 85°C (158˚F or 358K), the Nº436/434 can be
taken out of sleep mode using the standby button.
7. No audio and the indicator LED is lit at full brightness.
•
The Nº436/434 is powered on, but is not passing a signal.
Examine signal cables to ensure a solid connection
between the Nº436/434 and the associated preamplifier
and loudspeakers.
8. The Nº436/434 keeps powering off.
•
A signal-related fault may be present at the input (e.g., a
DC signal from the preamplifier) or the output (e.g., shortcircuited loudspeaker wires). If this occurs:
a.
Power the Nº436/434 off using the power button.
b. Disconnect the input signal and loudspeaker wires.
c.
Wait 10 seconds.
d. Power the Nº436/434 on using the power button.
If the Nº436/434 powers on without entering standby or
sleep mode, a fault is present at the input or the output.
To isolate the problem:
a.
Power the Nº436/434 off using the power button.
b. Reconnect the loudspeaker wires.
c.
Power the Nº436/434 on using the power button.
If the Nº436/434 powers on into standby or sleep mode,
the fault is present at the output. If not, the fault is present at the input.
9. If all else fails...
•
Power cycle the Nº436/434 using the power button, waiting
at least 10 seconds between powering the Nº436/434 off
and on.
•
Contact an authorized Mark Levinson dealer.
•
Contact Mark Levinson Customer Service at 781-280-0300
or www.marklevinson.com.
3-3
Troubleshooting & Maintenance
Mark Levinson
Care & Maintenance
The Nº436/434 requires routine care and maintenance to ensure
optimal performance. The bulleted items included in this section
indicate maintenance procedures that should be performed on a
regular basis.
Note
Failure to perform the maintenance procedures included in this section
may void the manufacturer’s warranty and/or standard repair policies.
•
Use a feather duster or a low-pressure blower to remove dust
from the Nº436/434 exterior surface.
•
Use a soft, lint-free cloth to remove dirt and fingerprints from
the Nº436/434 exterior surface. DO NOT use a cloth made
with steel wool or metal polish.
–
If needed, this cloth can be dampened with isopropyl
alcohol. DO NOT dampen the cloth with Benzene,
acetone-based cleaners, and other commercial cleaners.
–
Wipe the Nº436/434 exterior surface in the same direction
as the grain of the brushed aluminum.
3-4
Caution!
DO NOT apply liquid directly to the Nº436/434 exterior surface. Doing so may damage electrical components.
•
Refer to “Installation Considerations” for information about
preventative maintenance.
Appendix
Specifications
Nº436 rated power output:
Nº434 rated power output:
•
350 w/ch rms power @ 8Ω
•
700 w/ch rms power @ 4Ω
•
125 w/ch rms power @ 8Ω
•
250 w/ch rms power @ 4Ω
All power ratings from 20Hz to 20kHz @ <0.5% THD (assuming that
the AC mains can deliver adequate current without its own voltage
sagging).
Frequency response:
•
20Hz to 20kHz (±0.3dB)
Signal-to-noise ratio:
•
better than –80dB, (ref. 2.83V)
Input impedance:
•
100kΩ (balanced)
•
50kΩ (unbalanced)
Voltage gain:
•
26.8dB
Input sensitivity:
•
2.83V output: 130mV for both models
•
full output: 2.419V for Nº436
•
full output: 1.445V for Nº434
•
525W (±5%) on
•
100W (±5%) standby
•
275W (±5%) on
•
100W (±5%) in standby
•
preset (determined by needs of country for which product was
manufactured)
Nº436 power consumption:
Nº434 power consumption:
AC mains voltage:
All specifications are subject to change without notice.
A-1
Appendix
Mark Levinson
Specifications (continued)
Overall dimensions:
•
See “Dimensions, Nº436” and “Dimensions, Nº434”
Nº436 weight:
•
shipping: 95 pounds (43.2kg)
•
net: 85 pounds (38.6kg)
•
shipping: 65 pounds (29.5kg)
•
net: 56 pounds (25.5kg)
•
2 custom-designed loudspeaker binding posts
•
1 balanced input connector (female XLR)
•
1 unbalanced input connector (RCA)
•
2 1/8-inch (3.5mm) mini-jacks for trigger control
•
1 RS-232 port (RJ-11)
•
2 Mark Levinson Link communication ports (RJ-45)
•
1 IEC-standard AC mains receptacle
•
<0.05Ω (20 to 20,000Hz)
Nº434 weight:
Connector complement:
A-2
Output impedance:
All specifications are subject to change without notice.
Nº436/434
Appendix
Declaration of Conformity
Application of Council Directive(s):
89/336/EEC and 73/23/EEC, as amended.
Standard(s) to which Conformity is Declared:
•
EN 55013:2001
•
EN 55020:2002
•
EN 60065:1998
•
EN 61000-3-3:2001
Manufacturer:
Harman Specialty Group
3 Oak Park
Bedford, MA 01730-1413 USA
The equipment identified here conforms to the Directive(s)
and Standard(s) specified above.
Type of Equipment:
Power Amplifiers
Models:
Mark Levinson Nº436 and Nº434
Date:
July 2004
Harman Specialty Group
Vice President of Engineering
3 Oak Park
Bedford, MA 01730-1413 USA
Telephone: 781-280-0300
Fax: 781-280-0490
www.marklevinson.com
A-3
Appendix
Mark Levinson
Dimensions, Nº436
17.75”
45.09cm
7.65”
19.4cm
6.97”
17.7cm
MONO AMPLIFIER
Nº436
standby
power
3.31”
8.4cm
5.375”
13.7cm
A-4
MA R K LEVINSON
MONO AMPLIFIER Nº 436
S/N
inputs
trigger
in
communication
~ ac mains
2
1
slave in slave out
RS-232
trigger
out
“ indicates inches
6.75”
17.15cm
Nº436/434
Appendix
17.5”
44.5cm
5.25”
13.3cm
18.5”
47cm
20.21”
51.33cm
A-5
0.5”
1.27cm
0.375”
0.95cm
0.83”
2.1cm
“ indicates inches
Appendix
Mark Levinson
Dimensions, Nº434
17.75”
45.09cm
MONO AMPLIFIER
Nº434
5.22”
13.3cm
standby
5.91”
15cm
power
3.31”
8.4cm
5.375”
13.7cm
A-6
MARK LEVINSON
MONO AMPLIFIER Nº434
S/N
trigger
in
communication
inputs
~ ac mains
2
1
slave in slave out
RS-232
trigger
out
“ indicates inches
5.0”
12.7cm
Nº436/434
Appendix
17.5”
44.5cm
5.25”
13.3cm
18.5”
47cm
20.21”
51.33cm
A-7
0.5”
1.27cm
0.375”
0.95cm
0.83”
2.1cm
“ indicates inches
3 Oak Park, Bedford, MA, 01730-1413 USA | Telephone: 781-280-0300 | Fax: 781-280-0490 | www.marklevinson.com
Customer Service: Telephone: 781-280-0300 | Sales Fax: 781-280-0495 | Service Fax: 781-280-0499
Product Shipments: 16 Progress Road, Billerica, MA 01821-5730 USA
Part No. 070-630430 | Rev 6 | 07/04