Harman Kardon MA-362 Service manual
AUDIOACCESS
MA-362
TWELVE CHANNEL AMPLIFIER
PRELIMINARY SERVICE MANUA L
Harman Consumer Group
250 Crossways Park Dr.
Woodbury, New York 11797
MA
-
362
Audioaccess
®
Twelve
Channel
Amplifier
www.audioaccess.com
The Audioaccess MA-362 Twelve
Channel Amplifier represents a high value
approach while providing twelve channels
of clean amplifier power for multi-room
system applications.
Power to Spare
With a power rating of 50 Watts per
channel at 8 Ohms from 20Hz to 20kHz
with less than .05% THD, the MA-362
will drive virtually any in-wall loudspeaker
to room filling volume. Power into 4
Ohms is even more impressive at 75
Watts per channel. All channels may be
bridged if additional power is required.
Cool operation is ensured with a design
incorporating heat sinks, flow through
ventilation and low-noise fans.
After a series of careful evaluations
and tests, Madrigal has chosen to implement a conservative and proven design
philosophy with the MA-362 with the
added benefit of improved sound quality
and long component life. Power for each
channel is delivered by a pair of high
current output transistors capable of
delivering over 200 watts, much higher
power than the rated 50 watts per channel. For example, the output transistors
for each channel can handle up to 12
amps. At rated power, the MA-362 is
drawing only about 3 amps of current per
channel, ensuring its reliable performance.
Control Capabilities
Each pair of channels is controlled by a
Trigger Source Selector, a three-position
switch that selects signal sensing, voltage
trigger input or link (to the trigger signal
of the zone to the immediate left) as the
source for muting control within each
individual zone. A two position Signal Link
Selector, is also provided and is
used to link a zone to the Signal Input
connector of the zone to its left.
Installation Flexibility
Ease of installation, a hallmark of all
Audioaccess products is maintained in the
new MA-362. An external speaker termination board can be ordered in advance
to allow the installing dealer to “pre-wire”
all of the loudspeakers in the system before
the amplifier is delivered for final installation. Final hook up consists of plugging
the speaker termination board into a slot
in the rear panel of the amplifier.
Summary
The MA-362 features, performance
and reliability make it the perfect
amplifier choice for a wide variety of
multi-room audio system applications.
Simply Ingenious
A Harman International Company
Audioaccess
®
Madrigal Audio Laboratories, Inc.
P.O.Box 781
Middletown, CT 06457-0781
Internet: www.madrigal.com
Fax: 860.346.1540 ©2002 Madrigal Audio Laboratories, Inc.
20202AA – SS/MA-362
Specifications
▲ Rack mountable chassis
▲ Discrete amplifier design for improved
sound quality
▲ Signal Input Connector: six dual RCA jacks,
one per two channel
▲ Four position switch to select Stereo, Bridged
Right, Bridged Left, or mono operation for
each zone
▲ Independent level controls for each amp channel
▲ Trigger Input, euro-style connector, accepts 3
to 24V AC or DC, to “unmute” amp channels
in the zone
▲ Trigger Source Selector: three position switch
to select signal sensing, voltage trigger input
or link (to the trigger signal of the zone to the
immediate left) to control muting in the zone.
▲ Plug-in Speaker Termination Board, a snap for
advance installations (available separately, not
included with the amplifier)
▲ Signal Link Selector: two position switch to
link a zone to the signal input connector of
the zone to its left (excluding zone 1)
▲ Power Switch on Front panel
▲ Bi-color LED Power Indicator
Features
▲ Number of Channels: 12, configured as 6
left/right pairs (zones)
▲ Power Output (Unbridged): 50W @ 8Ω,
75W @ 4Ω, 20 - 20k Hz, All Channels Driven
▲ Power Output (Bridged): 150W @ 8Ω,
20 - 20k Hz, All Channels Driven
▲ THD+Noise: <0.05%, at rated power,
20 - 20k Hz
▲ IMD: <0.05% (SMPTE)
▲ Frequency Response: 20 - 20k Hz,
+0/-0.2 dB, at rated power, 4Ω load
▲ Bandwidth: 5 – 75k Hz. +0, -3dB, at rated
power, 4Ω load
▲ S/N: >100dB unweighted (ref: Rated Power),
unbridged into 8Ω
▲ Crosstalk: <-70 dB (ref: Maximum Output)
between any two channels (no audible
crosstalk)
▲ Protection: Short Circuit, Over Current, DC,
Thermal
▲ Muting: Turn on, Turn off, Signal Sensing, and
Triggered per zone
▲ Input impedance: 24kΩ
▲ Input Sensitivity: 1.0 Vrms (with input trim at
minimum attenuation)
▲ Input Level Trim Range: 20dB
▲ Gain: 26dB
Dimensions and weight:
▲ Height: 7" (178 mm)
(4 rack spaces, not including feet)
▲ Width front panel: 19" (483 mm),
Width chassis: 1711⁄16" (450 mm)
▲ Depth: 1711⁄16" (450 mm)
▲ Weight: 60 lb (27.2 kg) (without carton)
Features, specifications and dimensions are subject to change.
Audioaccess TI-501 Speaker Termination Board (Sold separately)
FEATURES
The Audioaccess MA-362 Twelve Channel Amplifi er represents a hi gh v alue approach while provi ding t welve channels of
clean amplifier power for multi-room system applications.
Power to Spare
With a power rati ng of 50 Watts per channel at 8 Ohms from 20Hz to 20kHz with less than .05% THD, the MA-362 will
drive virtuall y any i n- wall loudspeaker to room filling volum e. Power into 4 Ohms is even more impressive at 75 Watts per
channel. All channels may be bridged if additional power is required. Cool operati on is ensured with a design
incorporating heat sinks, flow through v entilation and low-noise fans. Aft er a series of car eful evaluations and tests,
Madrigal has chosen to im plement a conservative and proven desi gn philosophy with the MA-362 wit h the added benefi t
of improved sound quality and long component lif e. Power for eac h c hannel is delivered by a pair of high current output
transistors capable of delivering ov er 200 watts, muc h higher power t han t he r ated 50 watts per channel.
The output transistor s for each channel can handle 12 amps of curr ent. At rat ed power, the MA-362 draws 2.5 amps of
current, ensuri ng ample safe operating area headroom and rel iable performance.
Zone Muting Control
Each pair of channel s is contr olled by a three-positi on Trigger Source swit c h to select signal sensing, volt age trigger or
link (to the trigger si gnal of the zone to the immediate left).
Unique In put Bussi n g
A two position Signal Link switch is also provided for each zone. This allows assignment of direct input to the zone, or to
share the source utili z ed by the z one t o its l eft, elim inating the need for Y-cords to di stri bute common inputs to multiple
zones.
Installation Flexibility
Ease of installati on, a hallmark of all Audioacc ess products i s maintained in the new MA-362. An exter nal speaker
terminati on boar d c an be ordered in advance to allow termination of loudspeakers before the amplifier is delivered for final
install ation. At final, simply plug the speaker termination board onto the r ear panel of the amplifier.
Summary
The MA-362 features, performance and reliability make it the perfect amplifier choice for a wide variety of multi-room
audio system applications.
Specifications:
• Number of Channels: 12, c onfigured as 6 left/right pairs (zones)
• Power Output (Unbridged): 50W @ 81Ú2,
• 75W @ 41Ú2, 20 - 20k Hz, All Channels Driven
• Power Output (Bri dged) : 150W @ 81Ú2,
• 20 - 20k Hz, All Channels Driv en
• THD+Noise: <0. 05%, at rated power,
• 20 - 20k Hz
• IMD: <0.05% (SMPTE)
• Frequency Response: 20 - 20k Hz , + 0/-0.2 dB, at rated power, 41Ú2 load
• Bandwidth: 5 — 75k Hz. +0, -3dB, at rated power, 41Ú2 load
• S/N: >100dB unweighted ( r ef: Rated Power), unbridged int o 81Ú2
• Crosstalk: <- 70 dB (ref: M aximum Output) between any two channels (no audi ble crosstalk)
• Protection: S hort Cir c uit, Over Cur r ent, DC, T hermal
• Muting: Turn on, Turn off, Signal Sensing, and Triggered per zone
• Input impedance: 24k1Ú2
• Input Sensitiv ity: 1.0 Vrms (with input trim at minim um attenuat ion)
• Input Level Trim Range: 20dB
• Gain: 26dB
• Dimensions and weight:
Height: 7" (178 mm) (4 rack spaces, not including feet)
Width front panel : 19" ( 483 mm), Wi dth c hassis: 17 1/ 16" ( 450 mm)
Depth: 17 1/16" ( 450 mm). W eight: 60 lb ( 27.2 kg) (without carton)
Features, specifications and dimensions are subj ec t to change.
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