For Sale To Home


McIntosh MAC-4100 AM/FM Stereo receiver in excellent condition with custom solid wood cabinet. Rated at 75 watts RMS per channel into 8 ohms and 100 watts RMS per channel into 4 ohms. It has been serviced. Our original Performance Verification Report included. Manufactured from 1979 to 1985 with a retail price of $2000.00.

Also Included with this Item:

Original Owner's Manual


From McIntosh:

The phono amplifier in the MAC4100 uses a new high technology integrated circuit operational amplifier. Its differential input stage has been optimized for low noise and low distortion performance.

Electronic input selector switching uses field effect analog switches. The mechanical input selector simply switches small amounts of DC which turn the FET analog switches off or on. This design eliminates degradation of frequency response and also eliminates noise pickup from long signal paths necessary with conventional mechanical switching. It means, as well, that switch clicks and pops have been eliminated.

The equalizer amplifier is constructed with ion implanted junction field effect operational amplifiers. These new devices amplify signals with a 6 dB better signal to noise ratio than their bipolar counterparts.

Amplifiers are capable of delivering large quantities of power when they are driven to clipping. Clipping is caused when the amplifier is asked to produce more power output than it can deliver with low distortion.

The MAC4100 has a built-in waveform comparator that compares the wave shape of the input signal with the output signal. If the disparity between the two signals exceeds 0.5% a front panel signal illuminates in red at the top of the power output indicators, with any further increase in distortion the Power Guard circuit will operate.



Power Guard anti-clipping
Auto-Phono shut off circuit (turns receiver on and off with turntable).
Made in U.S.A.


Equalizer Frequency 30
Equalizer Frequency 150 Hz
Equalizer Frequency 500 Hz
Equalizer Frequency 1500 Hz
Equalizer Frequency 10 KHz


Input Selector: Aux 1, Aux 2, AM, FM, Phono 1, Phono 2
Monitor Tape
Monitor Tape 2
Tape Copy T1 > T2
Tape Copy T2 > T1
FM Mute
Speakers 1
Speakers 2
Speakers 3


Signal Strength Meter
Tuning Meter
Left Channel Power Meter: 7 Segment LED plus Power
Right Channel Power Meter: 7 Segment LED plus Power Guard
AFL (Automatic Frequency Lock)


Head Phones
Head Phones 2
Tape 2 In
Tape 2 Out

Rear Panel:

AC Outlet Unswitched (2)
AC Outlet Switched
Turntable AC (2)
Turntable AC: Auto/Manual
Antenna Inputs:
FM 75 ohm, FM 300 ohm, AM
AM Ferrite Bar Antenna
Phono 1 (L, R)
Phono 2 (L, R)
Aux 1 (L, R)
Aux 2 (L, R)
Tape 1 Rec (L, R)
Tape 1 Play (L, R)
Tape 2 Rec (L, R)
Tape 2 Play (L, R)
Pre-Out (L, R)
Main-In (L, R)
Scope Vertical
Scope Horizontal
Speakers 1
Speakers 2
Speakers 3

Shipping weight 50 Lbs.



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Buyer to pay item purchase price plus shipping charges from 95609.
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Shipping to the U.S. only.

This item includes our 60 day / 2 year limited warranty!

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MAC-4100 Power Supply Refurb:



Also Refurbished:
Left Channel Amp Section
Right Channel Amp Section

Dial Illumination has been changed to LEDs.