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...
[ Read More ]
- Shipping
- To ensure safe arrival, we often use private couriers. These are transporters in Sprinter Vans or pulling covered trailers often moving art and antiques across the country. Absolutely the safest way to ship short of you picking it up yourself. This piece ships to the contiguous United States for a flat rate of $300, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
- 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!
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...
[ Read More ]
Shipping
To ensure safe arrival, we often use private couriers. These are transporters in Sprinter Vans or pulling covered trailers often moving art and antiques across the country. Absolutely the safest way to ship short of you picking it up yourself. This piece ships to the contiguous United States for a flat rate of $300, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
Stock No.
9002605609181
