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Performance Features
Introduction and Performance Features
Introduction
Now you can take advantage of traditional McIntosh stan-
dards of excellence in the MA2275 Tube Integrated Ampli-
fier. The versatile Preamplifier together with two 75 watt
Power Amplifier Channels provide all the electronics nec-
essary to drive any high quality Loudspeaker System. The
MA2275 reproduction is sonically transparent and abso-
lutely accurate. The McIntosh Sound is “The Sound of the
Music Itself.”
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••
• Power Output
The MA2275 has two separate power amplifier channels,
each capable of 75 watts into 2, 4 or 8 ohm Loudspeakers.
••
••
• Bifilar Wound Transformers and Output Circuit
The Power Output Circuitry utilizes the famous McIntosh
Patented Unity Coupled Circuit with a Bifilar Wound Out-
put Transformer for low distortion, extended frequency re-
sponse and cool operating output tubes.
••
••
• Electronic Input Switching
Digital Logic integrated circuits drive Electromagnetic
Switches on all inputs and operating functions for reliable,
noiseless, distortion free switching.
••
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• Balanced and Unbalanced Inputs
The MA2275 has five Inputs for high level program
sources and one Phono Input for a Moving Magnet Car-
tridge.
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• Tone Control Bypass
The Bass and Treble Control Circuit Elements can be re-
moved from the Signal Path.
••
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• Low Distortion
Distortion levels of all types are less than 0.5%. Music is
amplified with total transparency and accuracy.
••
••
• Remote Control Operation
A Remote Control is included that will allow control of
major front panel controls and switches. There are provi-
sions for connecting External Keypad and/or Sensors,
which allows for enjoyment of your McIntosh System from
other rooms in your home.
••
••
• Illuminated Power Meters
Peak responding Power Output Meters will indicate either
continuously or in a peak hold mode for each channel.
There is also a Meter Illumination Off Mode if desired.
••
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• Gold Plated Connectors and Tube Socket Contacts
Gold Plated Input Jacks and Output Binding Posts provide
trouble free connections. Ceramic tube sockets with gold
plated contacts provide protection from atmospheric con-
tamination. Output Tube Sockets include Air-Pipe cooling
at their bases.
••
••
• Fiber Optic Solid State Front Panel Illumination
The even Illumination of the Glass Front Panel is accom-
plished by the combination of custom designed Fiber Optic
Light Diffusers and extra long life Light Emitting Diodes
(LEDs).
••
••
• Super Mirror Chassis Finish
The Stainless Steel Chassis with Super Mirror Finish en-
sures the pristine beauty of the MA2275 will be retained
for many years.
XLR Connectors
Below is the Pin configuration for the XLR Balanced Input
Connectors on the MA2275. Refer to the diagram for con-
nection:
PIN 1: Shield/Ground
PIN 2: + Input
PIN 3: - Input
Power Control Connectors
The MA2275’s Power Control Outputs provide a 5 volt
signal. Use a 1/8 inch stereo mini
phone plug to connect to the
Power Control Input on other
McIntosh Components.
Data Port Connectors
The MA2275’s Data Port Output provides Remote Control
Signals. Use a 1/8 inch stereo
mini phone plug to connect to the
Data Port Inputs on McIntosh
Source Units.
Connector Information
Positive
N/C
Ground
Data Signal
N/C
Ground
Pin 1
Pin 2
Pin 3