The MA5100 is one of the best integrated amps, from one of the best brands. This particular example is stunning – cosmetically near mint, save for a tiny nick on the top of the transformer. We went through it top to bottom, and each of the caps were great shape. About the only thing we could find was the opportunity to replace a setscrew. The next owner is bound to have fun with this piece.
- 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
- Factory 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.
- Documentation
McIntosh MA5100 Owner's Manual
McIntosh MA5100 Service Manual
McIntosh MA5100 Schematic
- 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...
[ Read More ]
- 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
The MA5100 is one of the best integrated amps, from one of the best brands. This particular example is stunning – cosmetically near mint, save for a tiny nick on the top of the transformer. We went through it top to bottom, and each of the caps were great shape. About the only thing we could find was the opportunity to replace a setscrew. The next owner is bound to have fun with this piece.
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
Factory 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.
Documentation
McIntosh MA5100 Owner's Manual
McIntosh MA5100 Service Manual
McIntosh MA5100 Schematic
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...
[ Read More ]
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
