Vintage / McIntosh MA5100 // Integrated Amplifier

The McIntosh MA5100 is a testament to the enduring appeal of vintage audio equipment. Its combination of classic design, exceptional build quality, and remarkable sound performance makes it a standout choice for any music lover. Whether you’re building a retro-themed audio setup or simply looking for an amplifier with character and charm, the MA5100 is sure to impress. Experience the timeless allure of McIntosh with the MA5100 and rediscover the joy of your music collection with an amplifier that bridges the past and present with effortless grace.

There is one small bubble in the black behind the glass in the upper right hand corner of the faceplate.

PRODUCTION

1966-72

CONDITION

9/10

ORIG. MSRP

$449

RESTORATION

• Full service check
• Checked capacitor values (ESR)
• Identified and replaced missing screw (left trim piece)
• Cleaned controls and switches
• Tested all inputs and outputs
• Exceeds mfg power output spec

SPECS

Type  Solid-state integrated amplifier

Power output  45 watts per channel into 8Ω (stereo)

Frequency Response  20-20kHz (+0.5 -0.5dB)

Total harmonic distortion  0.25%

Damping Factor  100

Power Amp Noise  -90dB

Signal to noise ratio  70dB (phono), 75dB (line)

Input sensitivity  2mV (phono/tape), 300mV (line)

Tape Output  0.3V

Dual concentric tone controls  +18dB to -18dB

LF Filter  50Hz at 12dB/oct

HF filter  5k at 12dB/oct

Phase Switch  0 or 180

Left+Right  adjustable to 6V at 5kΩ

Output  300mV (line)

Output Impedance  4Ω, 8Ω, 16Ω

Semiconductors  23 x diodes, 34 x transistors, 2 x TRIAC

Power Requirements  120V

Cabinet L12 (Also fits: L11, L52, and L62)

Dimensions  16"W x 6"H x 13"D

Weight  25 lbs.

THE HISTORY OF MCINTOSH

Founded in 1949, McIntosh is known for offering distinguished home audio systems that deliver the ultimate experience in music and film. Offering products for two-channel stereo sound systems and multi-channel home theaters with surround sound, McIntosh continues to define the ultimate home audio entertainment...
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LINER NOTES

The excellent operator's manual has a section on the loudness switch in which it correctly states that, when the volume is reduced, it is a characteristic of human hearing that the bass and treble decrease more rapidly than the midtonal range. Thus the loudness control automatically provides the bass and treble boost required to compensate for the change in response of the human ear at low loudness levels. In fact, as the loudness curves show, the circuit provides the appropriate amount of bass boost but it does not give any treble boost at any volume level. One can however correct the situation by slightly increasing the treble controls.

STOCK NO.

7976523104477