7
General Information, Cable Information, Introduction and Performance Features
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input, Input/Output Connectors on the MC75. Refer to
the diagram for connection:
PIN 1: Shield/Ground
PIN 2: + Output
PIN 3: - Output
Power Control Connector
The MC75 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 current up
to 20mA. The 1/8 inch stereo
mini phone plug connects to a
McIntosh Preamplifier or A/V Control Center Power
Control Output.
Note: The Power Control Connecting Cable is available
from the McIntosh Parts Department:
Data and Power Control Cable Part No. 170-202
Six foot, shielded 2 conductor, with 1/8 inch stereo
mini phone plugs on each end.
Connector and Cable Information
PIN 2
PIN 1
PIN 3
PIN 1
PIN 2
PIN 3
Power
Control
Ground
N/C
Introduction
Now you can take advantage of traditional McIntosh
standards of excellence in the MC75 Tube Power Am-
plifier. The 75 watt power output will drive any high
quality Loudspeaker System. The MC75 reproduction
is sonically transparent and absolutely accurate. The
McIntosh Sound is “The Sound of the Music Itself.”
Performance Features
• Power Output
The MC75 is a Tube Power Amplifier with a capabil-
ity of 75 watts into 2, 4 or 8 ohm speakers with less
than 0.5% distortion.
• Unity Coupled Circuitry
The MC75 Power Amplifier uses the famous McIn-
tosh Patented Unity Coupled Circuit which provides
low distortion, extended frequency response and cool
operating output tubes.
• Multifilar Wound Output Transformer
The MC75 Output Transformer Windings are part
of the Unity Coupled Circuitry. There are two bifilar
wound primaries, one for the cathodes and one for
the plates. The secondary winding is wound together
with the primary windings. This provides very close
primary to secondary coupling. The result is flat fre-
quency response and wide power bandwidth.
• Balanced and Unbalanced Input
Balanced connections guard against induced noise and
allow long cable runs without compromising sound
quality.
• Sentry Monitor Tube Protection
McIntosh Sentry Monitor Tube Protection Circuits
ensure the MC75 will have a long and trouble free
operating life.
• Gold Plated Connectors and Tube Socket Con
-
tacts
Gold Plated Input Jacks and Output Binding Posts
provide trouble free connections. Ceramic tube sock-
ets with gold plated contacts provide protection from
atmospheric contamination. Output Tube Sockets
include Air-Pipe cooling at their bases.
• Special Power Supply
A regulated Power Supply, a very large core Power
Transformer and large capacitors ensure stable noise
free operation even though the power line varies.
• Titanium Chassis with Super Mirror Finish
The famous McIntosh Stainless Steel Chassis with
Super Mirror Gold Finish ensure the pristine beauty of
the MC75 will be retained for many years.
INPUT
IN/OUT
