4
Cable Information, Introduction and Performance Features
Introduction
Now you can take advantage of traditional McIntosh
standards of excellence in the MC1.25KW Quad Bal-
anced Power Amplifier. The 1200 watts high current
output will drive any high quality Loudspeaker. The
MC1.25KW reproduction is sonically transparent and
absolutely accurate. The McIntosh Sound is “The
Sound of the Music Itself.”
Performance Features
• Power Output
The MC1.25KW is a Power Amplifier with a capabil-
ity of 1200 watts into 2, 4 or 8 ohm speakers with less
than 0.005% distortion. The Power Amplifier Circuit-
ry uses Thermal Trak
1
Output Transistors for lower
distortion and cool operation.
• Full Balanced Quad-Differential Circuitry
The MC1.25KW is fully balanced from input to
output. It consists of two matched Power Amplifiers
operating in push-pull with their outputs combined in
a McIntosh Autoformer. The Quad Balanced configu-
ration 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 MC1.25KW will have a long
and trouble free operating life. Built-in Thermal Pro-
tection Circuits guard against overheating.
• Special Power Supply
A regulated Power Supply, a very large Toroidal
Wound Power Transformer and very large capacitors
ensures stable noise free operation even though the
power line varies.
• Illuminated Power Meter
The Illuminated Power Output Watt Meter on the
MC1.25KW 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
highest 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.
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ThermalTrak™ and ON Semiconductor are trademarks of Semi-
conductor Components Industries, LLC
• Fiber Optic Solid State Front Panel Illumination
The even Illumination of the Front Panel is accom-
plished by the combination of custom designed Fiber
Optic Light Diffusers and extra long life Light Emit-
ting Diodes (LEDs).
• Glass Front Panel and Super Mirror Chassis
Finish
The famous McIntosh Illuminated Glass Front Panel
uses long life Light Emitting Diodes (LEDs) and the
Stainless Steel Chassis with Super Mirror Finish
ensures the pristine beauty of the MC1.25KW will be
retained for many years.
