The McIntosh MC225 is a vintage vacuum tube amplifier that first hit the scene in 1961. With its 25 watts per channel in stereo mode and the ability to bridge to 50 watts in mono, it's the baby brother of the MC275, but don't let its smaller stature fool you—this amp packs a punch.Despite its modest power rating, the MC225 is celebrated for its smooth, musical sound. Users have praised its refined audio quality, noting that it offers a modern, refined sound that few amplifiers can match. Pair it with high-efficiency speakers, and you'll experience a rich, engaging listening session that belies its age.
*Includes the original tube cage
- Production
- 1961-67
- Condition
- 9/10
- Serial No.
- 615C7
- Orig. MSRP
- $198
- Restoration
- Replaced output tubes with matched JJ quad
- Replaced rectifier diodes
- Replaced selenium rectifier
- Cleaned control contacts
- Replaced all electrolytic capacitors
- Replaced thermistor
- Verified unit meets mfg specs for power and distortion.
- Spec: 25 watts RMS into 8 ohms @ 0.5% THD
- Factory Specs
Type Stereo Tube Amplifier
Power output 25W per channel into 8Ω (stereo), 50W into 8Ω (mono)
Frequency response 18Hz to 30,000Hz
Total harmonic distortion 0.5%
Tube complement 4x 7591, 1x 12AX7, 2x 12AU7, 2x 12BH7
Input sensitivity 0.5V
Signal to noise ratio 90dB
Speaker load impedance 4Ω to 16Ω
Dimensions 14.5" x 9.125" x 7"
Weight 34 lbs.
- Documentation
McIntosh MC225 Owner's Manual
McIntosh MC225 Service Manual
McIntosh MC225 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 MC225 has on one chassis two 25 watt power amplifiers. In addition to use as a stereo amplifier, the flexibility of the MC225 permits it to be used as a monophonic amplifier that delivers 50 watts, or as two separate 25 watt amplifiers with each channel amplifying completely separate programs, or as two amplifiers for use with an electronic crossover network. Such flexibility permits maximum use for greatest return from your investment.
- 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 $250, 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.
- 8929666138333
The McIntosh MC225 is a vintage vacuum tube amplifier that first hit the scene in 1961. With its 25 watts per channel in stereo mode and the ability to bridge to 50 watts in mono, it's the baby brother of the MC275, but don't let its smaller stature fool you—this amp packs a punch.Despite its modest power rating, the MC225 is celebrated for its smooth, musical sound. Users have praised its refined audio quality, noting that it offers a modern, refined sound that few amplifiers can match. Pair it with high-efficiency speakers, and you'll experience a rich, engaging listening session that belies its age.
*Includes the original tube cage
Production
1961-67
Condition
9/10
Serial No.
615C7
Orig. MSRP
$198
Restoration
- Replaced output tubes with matched JJ quad
- Replaced rectifier diodes
- Replaced selenium rectifier
- Cleaned control contacts
- Replaced all electrolytic capacitors
- Replaced thermistor
- Verified unit meets mfg specs for power and distortion.
- Spec: 25 watts RMS into 8 ohms @ 0.5% THD
Factory Specs
Type Stereo Tube Amplifier
Power output 25W per channel into 8Ω (stereo), 50W into 8Ω (mono)
Frequency response 18Hz to 30,000Hz
Total harmonic distortion 0.5%
Tube complement 4x 7591, 1x 12AX7, 2x 12AU7, 2x 12BH7
Input sensitivity 0.5V
Signal to noise ratio 90dB
Speaker load impedance 4Ω to 16Ω
Dimensions 14.5" x 9.125" x 7"
Weight 34 lbs.
Documentation
McIntosh MC225 Owner's Manual
McIntosh MC225 Service Manual
McIntosh MC225 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 MC225 has on one chassis two 25 watt power amplifiers. In addition to use as a stereo amplifier, the flexibility of the MC225 permits it to be used as a monophonic amplifier that delivers 50 watts, or as two separate 25 watt amplifiers with each channel amplifying completely separate programs, or as two amplifiers for use with an electronic crossover network. Such flexibility permits maximum use for greatest return from your investment.
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 $250, 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.
8929666138333
