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3
Cable Information, Introduction and Performance Features
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input, Input/Output Connectors on the MC611. Refer
to the diagram for connection:
PIN 1: Shield/Ground
PIN 2: + Input/Output
PIN 3: - Input/Output
Power Control Connector
The MC611 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 MC611
Power Output Meters. The 1/8
inch 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
(7.6m m).
Connector and Cable Information
Introduction
Now you can take advantage of traditional McIntosh
standards of excellence in the MC611 Quad Balanced
Power Amplifier. The 600 watts high current output
will drive any high quality Loudspeaker. The MC611
reproduction is sonically transparent and absolutely
accurate. The McIntosh Sound is “The Sound of the
Music Itself ”.
Performance Features
• Power Output
The MC611 is a Power Amplifier with a capability of
600 watts 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 dis-
tortion and cool operation.
• Quad Balanced Circuitry
The MC611 is fully balanced from input to output. It
consists of two matched power amplifiers operating
in push-pull with their outputs combined in a McIn-
tosh Autoformer. The Quad Balanced configuration
cancels virtually all distortion.
• Patented Autoformer
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.
• Balanced and Unbalanced Inputs
Balanced connections guard against induced noise and
allow long cable runs without compromising sound
quality.
• Power Guard
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.
• Sentry Monitor and Thermal Protection
McIntosh Sentry Monitor power output stage protec-
tion circuits ensure the MC611 will have a long and
trouble free operating life. Built-in Thermal Protection
Circuits guard against overheating.
• Special Power Supply
A very large Power Transformer and Large Capaci-
tors ensure stable noise free operation even though the
power line varies.
• Illuminated Power Meter
The Illuminated Power Output Watt Meter on the
MC611 is peak responding, and indicates the true
power output of the amplifier. The Peak Watt Hold
Mode allows the meter to temporarily stay at the high-
est power output and then slowly decay. The Front
Panel Meter Illumination may be switched Off at any
time.
• McIntosh Custom Binding Posts
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.
• Fiber Optic Solid State Front Panel Illumination
The even Illumination of the Front Panel is accom-
plished by extra long life Light Emitting Diodes
(LEDs).
• Glass Front Panel and Super Mirror Chassis
Finish
The famous McIntosh Illuminated Glass Front Panel
and the Stainless Steel Chassis with Super Mirror Fin-
ish ensures the pristine beauty of the MC611 will be
retained for many years.
Trigger
Control
Ground
Meter
Illumination
Control
1
ThermalTrak™ and ON Semiconductor are trademarks of Semi-
conductor Components Industries, LLC
PIN 1
PIN 2
PIN 3
PIN 2 PIN 1
PIN 3
OUT
IN
3/10 of an inch
(7.6millimeters)
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