McInstoshMC-501McInstosh MC-501 500 watt Monoblock AmplifierThis McIntosh MC-501 500w mono block has been used exclusively to drive the center speaker in my home theater system.  Using Audiogon’s definitions it is in very good condition having only a tiny...2800.00

McInstosh MC-501 500 watt Monoblock Amplifier [Template]

Listing ID: lis7cgi9 Classified 
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Time Left: 17 Days
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Payment methodsContact seller
Ships fromRound Rock, TX, 78664
Ships toUnited States
Package dimensions25.0" × 28.0" × 18.0" (106.0 lbs.)
Shipping carriersUPS or FedEx
Shipping cost
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Original accessoriesBox, Manual
Agon-miniAverage Research Pricing

This McIntosh MC-501 500w mono block has been used
exclusively to drive the center speaker in my home theater system.  Using Audiogon’s definitions it is in very
good condition having only a tiny scratch on the right side bezel.  I have the original factory shipping packaging
as well as the owner’s manual.

I’ve listed a few of the MC-501’s key features taken from
the Owner’s manual below; curtsy of McIntosh Labs: (I have and can send a .pdf
of the owner’s manual if interested)

For more information see the Stereophile review:

Power Output:

The MC501 is a Power
Amplifier with a capability of 500 watts into 2, 4 or 8 ohm speakers with less
than 0.005% distortion.


Full Balanced
Quad-Differential Circuitry:

The MC501 is fully
balanced from inputs to outputs. It consists of two matched power amplifiers
operating in push-pull with their outputs combined in a McIntosh Autoformer.
The double balanced configuration cancels virtually all distortion.


Patented Autoformers:

The McIntosh designed
and manufactured Output Autoformer provides an ideal match between the
amplifier output stage and speaker loads of 2, 4 and 8 ohms. The Autoformer
also provides perfect DC protection for your valuable Loudspeaker.


Patented 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


Patented Sentry Monitor
with Thermal Protection:

McIntosh Sentry Monitor
power output stage protection circuits ensure the MC501 will have a long and
trouble free operating life. Built-in Thermal Protection Circuits guard against




Power Output

Minimum sine wave
continuous average power output is:

500 watts into 2 ohm

500 watts into 4 ohm

500 watts into 8 ohm


Total Harmonic

Maximum Total Harmonic
Distortion at any power level from 250 milliwatts to rated power output is: 0.005%
for 2, 4 or 8 ohm load


Frequency Response

+0, -0.25dB from 20Hz
to 20,000Hz

+0, -3dB from 10Hz to



2.1 Volts Unbalanced

4.2 Volts Balanced


A-Weighted Signal to
Noise Ratio

97dB (124dB below rated
output) Unbalanced and Balanced



Maximum Intermodulation
Distortion if instantaneous peak output does not exceed twice the rated output,
for any combination of frequencies from 20Hz to 20,000Hz is: 0.005% for 2, 4 or
8 ohm load


Overall Dimensions

Front Panel: 17-1/2
inches (44.45cm) wide, 8-13/16 inches (22.38cm) high. Depth is 14-13/16 inches
(37.62cm) including the Front Panel and Knobs



91.5 pounds (41.6 kg)
net, 105.5 pounds (48 kg) in shipping carton

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Return Policy
Return Window

Item can be returned within 7 days of receipt.

General Terms

Items must be returned in their original condition, with all included packing materials and no signs of use. Buyer assumes responsibility for all shipping return costs unless the item was not received as described.


Buyer will receive a full refund in the original payment method less any shipping charges.

Seller Information


Last 12 months

Member since November 2009

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