Owner's Manual

4
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input Connectors on the MC152. Refer to the diagram
for connection:
PIN 1: Shield/Ground
PIN 2: + Input/Output
PIN 3: - Input/Output
Power Control Connector
The MC152 Power Control Input receives an On/Off
signal from +5 to +12 volts. The Power Control Output
will in turn provide a +12 volt
Output Signal with a total cur-
rent up to 50mA. An additional
connection is for controlling
the illumination of the MC152
Power Output Meters. The
3.5mm stereo mini phone plug connects to a McIntosh
Preamplifier or A/V Control Center Power Control
Output.
Output Terminal Connector
When cables with spade lugs are used
for Loudspeaker Connection, the spade
lugs need an opening of at least 3/10 inch
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Cable Information, Introduction and Performance Features
Connector and Cable Information
Introduction
Now you can take advantage of traditional McIntosh
standards of excellence in the MC152 Power Ampli-
fier. The 150 watts high current output per channel
will drive any high quality Loudspeaker. The MC152
reproduction is sonically transparent and absolutely
accurate. The McIntosh Sound is “The Sound of the
Music Itself.”
Performance Features
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The MC152 is a Power Amplifier with a capability
of 150 watts per channel into 2, 4 or 8 ohm speakers
with less than 0.005% distortion. The Power Amplifier
Circuitry uses Thermal Trak
1
Output Transistors for
lower distortion and cool operation.
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McIntosh designed and manufactured Output Auto-
formers provide an ideal match between the amplifier
output stages and speaker loads of 2, 4 and 8 ohms.
The Autoformers also provide perfect DC protection
for your valuable loudspeakers.
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Balanced connections guard against induced noise and
allow long cable runs without compromising sound
quality.
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The patented McIntosh Power Guard circuit prevents
the amplifier from being over driven into clipping,
with its harsh distorted sound that can also damage
your valuable loudspeaker.
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McIntosh Sentry Monitor power output stage protec-
tion circuits ensure the MC152 will have a long and
trouble free operating life. Built-in Thermal Protection
Circuits guard against overheating.
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A very large Power Transformer and Large Capaci-
tors ensure stable noise free operation even though the
power line varies.
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The Illuminated Power Output Watt Meters on the
MC152 are peak responding, and indicates the power
output of the amplifier. The Front Panel Meter Illu-
mination may be controlled On/Off by comtemporary
McIntosh Preamplifiers and Audio/Video Control
Centers.
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The MC152 incorporates a Power Save Feature to
automatically switch power Off to the Power Ampli-
fier approximately 30 minutes after there has been an
absence of an audio input signal.
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McIntosh patent pending gold plated output terminals
deliver high current output. They accept large diam-
eter wire and spade lugs. Banana plugs may also be
used only in the United States and Canada.
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The famous McIntosh Illuminated Glass Front Panel
is evenly Illuminated by the combination of custom
designed Fiber Optic Light Diffusers and extra long
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Trigger
Control
Ground
Meter
Illumination
Control
1
ThermalTrak™ and ON Semiconductor are trademarks of Semi-
conductor Components Industries, LLC
3/10 of an inch
(7.6millimeters)
PIN 2 PIN 1
PIN 3