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McIntosh MC58 Multichannel Amplifier - 8 Configurable Channels

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Pickup currently unavailable at SkyFi 479

Mcintosh Mc58 Multichannel Amplifier - 8 Configurable Channels

McIntosh MC58 Multichannel Amplifier - 8 Configurable Channels

SkyFi 479

Pickup currently unavailable

479 South Broad Street
Glen Rock NJ 07452
United States


*Important note - the glass in our first photo looks frosted from a board we used to dampen reflections. The glass is perfect as shown in the second photo.

Super flexible and capable amplifier from legendary maker McIntosh. Finished in their classic and timeless traditional glass faceplate with backlighting.

Eight individual channels that can be bridged to mono in pairs, providing many possible configurations including:

8 x 30W
6 x 30W Plus 1 x 100W
4 x 30W Plus 2 x 100W
2 x 30W Plus 3 x 100W
4 x 100W

"Eight 50 watt McIntosh amplifier channels in one convenient package make the MC58 an ideal amplifier for a multizone system.

The MC58 can be configured in different Operating Modes to fit a wide range of uses where a multichannel amplifier is required. For example, it has the ability to bridge a pair of channels for 100 watts output."

Performance Features:

Power Output
The MC58 consists of eight separate power amplifier channels, each capable of 50 watts into 4 ohm speakers with less than 0.005% distortion. This is 400 watts of McIntosh power in a single package.

Individual Channel or Bridged Pair Configuration
Each pair of MC58 amplifier channels can be operated separately at 50 watts each, or bridged for 100 watts. The MC58 is ideal for any application requiring a multichannel power amplifier, such as a mulitzone system or home theater system.

Power Guard
All eight channels include the patented McIntosh Power Guard Circuit, that prevents the amplifier from being overdriven into clipping with its harsh distorted sound that can also damage your valuable loudspeakers.

Sentry Monitor
McIntosh Sentry Monitor power output stage protection circuits are present on all eight channels to ensure the MC58 will have a long and trouble free operating life.

Thermal Protection
Built-in thermal protection circuits guard against overheating which could shorten the normal long life expectancy of your McIntosh power amplifier.

Direct Current Protection
Direct Current sensing circuits on each channel provide extra protection for your valuable loudspeakers.

Convenient Single Cable Hookup
A rear panel connector provides for the convenience of using a single cable, (DB25 computer style) to receive all audio and power control signals from a McIntosh Multizone Control System.

Please see our photos or the linked manual below for full specifications.

McIntosh MC58 Eight Channel Power Amplifier Manual

The SkyFi Testing Process for Solid State Amplifiers:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.



Original Box



Yes and Online


Not Applicable


Yes - Power

Physical Condition


Working Condition


SKU: 102010