Audiolab | Owner's manual | MH-9400

MH-9400
HIGH PERFORMANCE PROFESSIONAL POWER AMPLIFIER
USER MANUAL
PLEASE READ THE INSTRUCTIONS CAREFULLY BEFORE USE
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Congratulations for choosing audio LAB series professional power amplifier. You purchased one of the finest stereo
amplifiers on the market today. This unit was developed using the expertise of professional sound engineers and
working musicians. You will find that your new audio LAB series amplifier has superior performance and greater
flexibility than any other amplifiers in its price range. Please read this manual carefully to get the most out of your
new unit.
FEATURES
Offering top power, superior performance and full professional operating features in a roadworthy compact chassis,
the audio LAB series are perfect for even the most demanding sound reinforcement installation and touring applications.
The operating amplifier instruction in this manual are for all the audio LAB series professional power amplifiers. The
operation and functions of these units are the same, except as noted.
. Full operating features: detent volume controls; parallel bal-
anced XLR and 1/4" TRS inputs; stereo (dual channel), parallel-
input, or bridged mono operating modes with selector switch;
Independent user defeatable clip limiters (compressor) 3
selectable input sensitivities, ground lift switch, binding post
(banana plug) and speakon outputs.
. Full safety/re liability features: 2 dual speed fans for cooling;
soft start turn on, noise-free on-off; independent DC and thermal
overload protection on each channel; short circuit and speaker
protection; built-in current limiter.
. Front panel led indicators: Power, Signal, IPC and protection
. Roadworthy, rugged double rack space ( 2U/ 3U)
housing Series
. ~230V(50Hz) AC select switch and IEC cord power
Table of contents For your records
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Reference Manual Page 1
An equilateral triangle enclosing a lightening flash/arrowhead symbol is
intended to alert the user to the presence of uninsulated "dangerous
voltage” withinthe product’s enclosure which may be of sufficient
magnitude to constitute a risk of electric shock.
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RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
CAUTION: TÓ REDUCE THE RISKOF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK].
NO USER SERVICEABLE "ARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
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An equilateral triangle enclosing an exclamation point is intended to alert
the user to the presence of important operating and service instructions in
the literature enclosed with this unit.
IMPORTANT SAFETY INSTRUCTIONS
When using this electronic device, basic precautions should always be taken, including the following:
1. Read all instructions before using the product.
2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a swimming
pool, etc.).
3. This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.
4. This product, in combination with headphones or speakers, may be capable of producing sound levels that could cause
permanent hearing loss. Do not operate for a long period of time ata high volume level or at alevel thatis uncomfortable.
If you experience any hearing loss orringing in the ears, you should consult an audiologist.
5. The product should be positioned so that proper ventilation is maintained.
6. The product should be located away from heat sources such as radiators, heat vents, or other devices (including amplifiers)
that produce heat.
7. The product should be connected to a power supply only of the type described in the operating instructions or as marked on
the product. Replace the fuse only with one of the specified type, size, and correct rating.
8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other devices so that the
outlet” sorextension cord's power rating is exceeded, and (3) never be left plugged into the outlet when not being used
for a long period of time.
9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosure’s openings.
10. The product should be serviced by qualified service personnel if:
A. The power supply cord or the plug has been damaged.
B. Objects have fallen into, or liquid has been spilled onto the product.
C. The product has been exposed to rain.
D. The product does not appear to operate narmally or exhibits a marked change in performance.
E. The product has been dropped, or the enclosure damaged.
11. Do not attempt to service the product beyond what is described in the user maintenance instructions. All other servicing
should be referred to qualified service personnel.
INSTALLATION
This manual contains important information on operating your audio LAB amplifier correctly and safety. Please read it carefully before
operating your amplifier. If you have any questions, contact your audio LAB dealer.
UNPACKING
Carefully open the shipping carton and check for any noticeable
damage. Every audio LAB series amplifier is completed tested
and inspected before leaving the factory and should arrive in
perfect condition. If you find any damage, notify the shipping
company immediately. Be sure to save the carton and all
packing materials for carrier inspection.
CONTENTS
. Owner?s manual
. audio LAB series amplifier ( verify that the unit's serial number
Is same as shown on shipping carton)
. AC Power cord
RACK MOUNTING
The audio LAB series amplifiers are designed for standard 19” rack
mounting as well as "stack" mounting without a cabinet. Use 4
screws and washers for mounting to the front rack rails. It is also a
good idea to support the amps also in the rear, especially for
mobile use where the amps will be subjected to strong vibrations.
AMPLIFIER COOLING
Also pay close attention to the cooling requirements. Never block
the air vents in the back side and front of the amplifier .
Do notinstall the amplifierin a location that is exposed to direct
rays of the sun, or near hot appliances or radiators. Excessive
heat can adversely affect the cabinet and the internal components.
Installation ofthe amplifier ina damp or dust environment may
result in malfunction or accident.
If installed in a rack please be sure to open completely the back door.
Periodically remove the internal dust by using compressed air
through the external ventilation holes.
Page 2
Reference Manual
FRONT & REAR CONNECTIONS
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FRONT PANEL
1. POWER SWITCH
To turn the unit ON or OFF, press the upper or lower portion of
this button. Before turning on the amplifier, check all connections
and turn down the level controls. A momentary muting is normal
when turning the amplifier on or off.
(Caution: Always turn on your power amplifier last, after all your
other connected equipment, and always turn off your power
amplifier before your other connected equipment.)
2. POWER LED INDICATORS
These LEDs illuminate when the power is turned "ON".
3. IPC LED INDICATORS
These LEDs illuminate if any section of the power amplifier's
autput are within 3dB of clipping. Occasional blinking of the LEDs
are acceptable, but if they remain on more than intermittently you
should turn down either the power amplifier's level controls or
reduce the output level of the preceding component to avoid
audible distortion.
4. SIGNAL LED INDICATORS
These LEDs illuminate to confirm the presence of an input signal
greater than 100 mV at that channel of the amplifier
5.PROTECT LED INDICATORS
These LEDs illuminate if the power amplifier's output connection
is shorted , the load impedance is too low. Or if there is an internal
malfunction When either of these LEDs is lit up, turn OFF the power
and check the output's connection to verify thatitis correct, then
turn ON the power again.
6. LEVEL CONTROLS
These control the level of signal coming into each channel. The
actual voltage attenuation of the amplifier is shown in dB. Turn these
controls counterclockwise if the Limit LEDs illuminate steadily
(indicating a too strong input signal).
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REAR PANEL
7. POWER CONNECTOR
The cord connector is used to connect the AC power source to
your power amplifier.
( CAUTION : Always operate the unit with the AC
ground wire connected to the electrical system ground)
8. BREAKER
AC circuit breaker. If the breaker continuously blow, shut off the
unit and have it serviced by qualified service personnel.
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9.GROUND LIFT SWITCH
Switch up to disconnect the chassis from ground if necessary
to eliminate hum caused by ground loops.
10. SENSITIVITY SELECTOR SWITCH
The audio LAB series amplifiers offer 3 SENSITIVITY of
operation: 0.7V 1.0V a 1.44V.
11. L/R CHANNEL OUTPUT CONNECTORS
Connections are as described on the rearpanel and in the
GONNECTIONS section on page 5 of this manual.
Reference Manual
Page 3
FRONT & REAR CONNECTIONS
12. BALANCED INPUT CONNECTORS (XLR)
The XLR connector is compatible with balanced inputs. Since the
XLR connector is internally wired in parallel, you can parallel
this unit with another amplifier by using the XLR to output the
signal to the input connectors of the other amplifier. Balanced
connections are recommended as they are less prone to AC
hum. For long cable runs a source output impedance of less
than 600 ohms is needed to avoid signal loss. For short cable
runs an unbalanced signal input should be suitable. For stereo
(two-channel) operation, use the inputs for both CH-1 and CH-2;
for parallel or bridged mono operation, use only CH-1 input.
(See MODE SELECTOR SWITCH below for more explanation.)
13. MODE SELECTOR SWITCH
The audio LAB series amplifiers offer 3 modes of operation:
PARALLEL, STEREO & BRIDGED. Slide the switch to one of
the three positions for you application.
. PARALLEL (MONO) INPUT - This mode allows both channels
to operate in parallel with the same signal and without requiring
a Y-cord. In this mode the inputs for both channels are
internally connected, so that you only need to feed a signal into
one of the channels. This still allows independent level control
of each channel. It also enables easy “daisy-chaining” with other
amps by using the other channel of input connectors.
(Note: Do not select this "Parallel" mode when feeding the
amplifier with 2 separate signals.)
(Note: Do not use both unbalanced and balanced cables in the
same set-up as that can unbalance all the connections when
daisy-chaining, resulting in hum.)
. STEREO INPUT - This is the most common mode generally
used, and allows independent control of 2 separate signals
such as stereo playback, main and monitor live mixes, and bi-
amp operation (highs in one channel and lows in the other).
. BRIDGED MONO - This mode combines the power of both
channels to drive a single speaker. In this mode the amp
produces 4 times the peak power and 3 times the sustained
power into a 4 or 8 ohm speaker than each channel can deliver
separately in stereo or parallel mode.
(CAUTION: In this mode the amplifier can deliver high power
into a speaker. Make sure that the speaker, connectors and
wiring can handle this output. Note that for prolonged
overdriven outputs into a4 ohm speaker the mains fuse may
blow, so care must be taken not to overload the amplifier in such
operation.)
Connect the input signalto CH-1
operation.
input for bridged mono
14. VENTILATION HOLES
The fan speed is varied automatically to maintain the
proper internal operating temperature.
Page 4
Reference Manual
CONNECTIONS
The following instructions describe the most common ways to install your amplifier into a sound system.
1. Turn off the amplifier power switch before making any connections.
2. The audio LAB series amplifiers maybe operated in one of three modes (stereo, bridged-mono, and parallel mono). Re fer to
the following wiring diagrams for the speaker connections you wish to make.
(Note: audio LAB Systems assumes no liability for damaged speakers resulting from improper wiring, careless amplifier use, or
over powering.)
XLRINPUTS
2 1 1 2
Ground (Screen)
3 3
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(Qut of Phase Signal)
Hot (+)
(In Phase Signal)
Socket (female) Plug (male)
. Stereo (Two-Channel) Mode
To put the amplifier into stereo mode, first turn the amplifier off, then slide the MODE SELECTOR SWITCH (13) to the middle
"STEREO" position, and properly connect the input/output wiring as shown.
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Reference Manual Page 5
CONNECTIONS
. Parallel (Mono) Mode
To put the amplifier in parallel-mono mode, first turn the amplifier off, then slide the MODE SELECTOR SWITCH (13) to the top
"PARALLEL (MONQ)" position and properly connect the input/output wiring as shown. A signal into any input connector will drive both
channels directly. You can patch the input signal on to any other amps using any of the remaining input jacks.
[Note: Do not use the "PARALLEL (MONO)" switch when feeding the amp 2 separate signals.]
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. Bridged Mono Mode
To put the amplifier in bridged mono mode, turn the amplifier off and slide the MODE SELECTOR SWITCH (13) toward the bottom
"BRIDGED" position and properly connect the input/output wiring as shown. The signal is input into CH-1. Keep the level control of
channel "2" turned completely down (counter clock wise).
(Note: This mode produces a large amount of power. Be sure that your wiring and speaker can handle it.)
LENSTIVITY
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Page 6 Reference Manual
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SPECIFICATIONS
MODEL CHARACTERISTIC MH3200|MH5200|MH7200|MH8200|MH9200|MH9400
Out Power (89) 2x400W | 2x600W | 2x800W | 2x1000W | 2x1200W | 2x1400W
Out Power (49) 2x650W | 2x950W | 2x1300W | 2x1600W | 2x1800W | 2x2100W
Out Power (29) 2x950W | 2x1400W | 2x1900W | 2x2400W | 2x2700W | 2x3000W
Out Power(BRIDGE) (82) 1300W | 1900W | 2600W | 3200W | 3600W | 4200W
Out Power(BRIDGE) (49) 1900W | 2800W | 3800W | 4800W | 5400W | 6000W
FREQUENCY RESPONSE @ Half Pwr 15Hz - 25KHz( +0/-1dB)
THD+Noise @ 1KHz Full Pwr <0.03% <0.035%
IMD 60Hz 8 7KHz,4:1 <0.038% <0.04%
SIGNAL TO NOISE RATIO >102dB >105dB
SLEW RATE (input filter limited) 40VIUS
DAMPING FACTOR 1Khz@8 ohm >400: 1
INPUT SENSITIVITY SELECTABLE (0.77V/1.0V/1.44V)
INPUT IMPEDANCE 10K ohm Balanced to ground
INPUT CONNECTORS Female XLR-3
OUTPUT CIRCUIT TYPE Class AB Class H
OUTPUT CONNECTORS 4 Pole SPEAKON & Binding posts
PROTECTIONS Full short-circuit, Open-circuit, Thermal, Soft-start, DC voltage, Sub/Ultrasonic and RF
LED INDICATORS (per channel) POWER, SIGNAL, IPC, PROTECT
PANEL CONTROLS FRONT-2 input attenuators REAR- Ground lift, mode selection, compressor
COOLING Front-to-Back via 2 variable-speed fans
POWER SUPPLY VOLTAGE 230V AC/50Hz
OVER CURRENT PROTECTION 88-8A | 88-12A | 88-16A | 98-20A | 98-20A | 98-20A
DIMENSION( mm) 482 x 443.5 x 88.8 432 x 468 x 132
N WEIGHT /G WEIGHT (Kg) 23.5/26 | 26/28.5 | 27/29.5 | 33/36 34/37 | 35.5/38.5
The specifications above are correct at the time of printing of this manual. For improvement purposes, all
specifications for this unit, including design and apperance, are subject to change without prior notice.
Page 8
Reference Manual
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/A AUDIOLAB