3
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input, Input/Output Connectors on the MI347. Refer to
the diagram for connection:
PIN 1: Shield/Ground
PIN 2: + Input/Output
PIN 3: - Input/Output
Power Control Connector
The MI347 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 current up to 50mA. An additional connection
is for controlling the illumination
of the MI347 Meter Power Output
Indicators. 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
(7.6mm)
General Information, con’t, and Cable Information, Introduction and Performance Features
Connector and Cable Information
Introduction
Performance Features
Power
Control
Meter
Illumination
Control Ground
Now you can take advantage of traditional McIntosh
standards of excellence in the MI347 Power Amplifier.
The Seven Channel Power Amplifier produces high
power output per channel and will drive quality
Loudspeakers to a high level of performance. The
MI347 reproduction is sonically transparent and
absolutely accurate. The McIntosh Sound is “The
Sound of the Music Itself.”
• Power Output
The MI347 consists of Seven Channel Power
Amplifier. Four Channels are rated at 125 watts with 8
ohms Loudspeakers and the three other Channels are
rated at 250 watts with 8 ohms Loudspeakers
The MI347 has been engineered for Home Theater
applications. This is why three channels, which are
intended to power the Left and Right Front Speakers
and the Center speaker, have twice the power as the
other four. (Pay attention to keeping the channels
straight!) The remaining channels are gain matched
for seamless multichannel integration.
•Power Guard
®
The McIntosh Power Guard
®
Circuit prevents the
amplifier from being over driven into clipping, with its
harsh distorted sound that can damage your valuable
Loudspeakers.
• Versatile Operation
The MI347 can provide power amplification for seven
channels in a single Zone A/V System or multiple in a
multiple channels for each of a Zone A/V System.
• Balanced, Unbalanced and Bus Inputs
There are Balanced and Unbalanced Connections for
all seven Power Amplifier Input Channels.
• Sentry Monitor and Thermal Protection
McIntosh Sentry Monitor power output stage
protection circuits ensure the MI347 will have a long
and trouble free operating life. Built-in Thermal
Protection circuits guard against overheating.
• Power Control
The McIntosh Power Control Circuit allows for
remote turn-on of the MI347 Power Amplifier from
a McIntosh A/V Control Center or Preamplifier for a
single or dual Zone System.
• Engineered Power Supply
A regulated Power Supply ensures stable operation
despite power line variations.
• LED Solid State Front Panel Illumination
Front Panel Illumination is accomplished by extra long
life Light Emitting Diodes (LEDs). The Metal and
Glass Front Panel ensures the pristine beauty of the
MI347 will be retained for many years.
PIN 2
PIN 1
PIN 3
6. For additional information on the MI347 and
other McIntosh Products please visit the McIntosh
Website at www.mcintoshlabs.com.
3/10 of an inch
(7.6mm)
