The MC75 monoblocks are the kind of amps that make seasoned audiophiles nod with quiet respect. These aren’t just show ponies—they’re pure-blooded thoroughbreds, steeped in McIntosh heritage and rebuilt for today’s most demanding ears. Classic looks? Check. 6550 tube firepower? Absolutely. Sound that’ll stop you mid-sentence? You bet.
This pair has been meticulously restored and upgraded with Mundorf and Obligato caps and custom chrome filter cans. Check under the hood!
- Production
- 1961-70
- Condition
- 9/10
- Serial No.
- 222B5 / 222B6
- Orig. MSRP
- $229 each
- Restoration
- All tubes test strong
- Replaced all electrolytic capacitors
- Replaced all coupling capacitors in signal path with Mundorf Evo Oils and Obligato Ultra Premiums
- Replaced all filter capacitors (check out that chrome)
- Rebuilt power supply
- Replaced thermistors
- Replaced RCA jacks
- Cleaned controls
- Verified power and distortion at 1 kHz:
- Spec: 75 watts RMS into 8 ohms @0.5%THD
- Serial Number 222B5 75.1 watts RMS into 8 ohms @0.16% THD+N
- Serial Number 222B6 75.0 watts RMS into 8 ohms @0.06% THD+N
- Factory Specs
Type Vacuum tube power amplifier (mono pair)
Response 16-40kHz (+0 -0.1dB)
Distortion 0.5%
Noise & Hum -90dB
Output Impedance 4, 8, 16, 67, 150 and 600 ohms; 600 ohm balanced to ground; 4, 8 and 16 ohms isolated from ground
Output Voltages 25, 70.7, 115 and 230V; 230V winding center tapped
Internal Impedance less than 10% of rated impedance
Input Impedance 250k
Input Sensitivity 0.5V (2.0V with gain control switched at maximum)
Transformers Unity Coupled
Rectifier Solid state
Dimensions 8.25"H x 8.24"W x 16.75"D
Weight 44 lbs.
- Documentation
McIntosh MC75 Owner's Manual
McIntosh MC75 Service Manual
McIntosh MC75 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...
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- Stock No.
- 9002605609181
The MC75 monoblocks are the kind of amps that make seasoned audiophiles nod with quiet respect. These aren’t just show ponies—they’re pure-blooded thoroughbreds, steeped in McIntosh heritage and rebuilt for today’s most demanding ears. Classic looks? Check. 6550 tube firepower? Absolutely. Sound that’ll stop you mid-sentence? You bet.
This pair has been meticulously restored and upgraded with Mundorf and Obligato caps and custom chrome filter cans. Check under the hood!
