One of the most sought-after vintage pieces, period, the Pioneer M-22 was in a class all its own. Introduced in 1976, the M-22 was the crown jewel of Pioneer's legendary "Series 20" lineup. This was at the height of the 'Wattage Wars," yet Pioneer confidently presented this amp to serious listeners who cared about other specs - clarity. At full power, this compelling Class A design delivers 10-30,000Hz response with less than 0.01% distortion. This piece is in top shape electronically, and performed well in our bench tests. If you look very closely, you'll see the front badge has a few nicks, but fade from a listening position. We're sure you'll fall in love with the sound of this amp, just be ready to answer the question, "What is that?"
- Production
- 1976-80
- Condition
- 8/10
- Serial No.
- WG1003957
- Orig. MSRP
- $499
- Restoration
- Full 30-point service check
- Replaced output transistors
- Replaced two leaking caps
- Repainted transformers and heat sinks
- Cleaned controls, switches, and chassis
- Specs
Type Solid state power amplifier
Architecture Class A
Power output 30 Wpc > 8Ω (stereo)
Frequency response 10Hz to 30kHz
Total harmonic distortion 0.01%
Damping factor 60
Input sensitivity 1V
Speaker load impedance 8Ω (minimum)
Semiconductors 44 x transistors, 66 x diodes
Dimensions 16.5"W x 6"H x 14.6"D
Weight 49 lbs.
- Documentation
Pioneer M22 Owner's Manual
Pioneer M22 Schematic
- The History of Pioneer
- Pioneer was founded by Nozomu Matsumoto in 1938 in Tokyo as a radio and speaker repair shop. In December 1953 Mr. Nozomu Matsumoto succeeded in developing the first domestic dynamic speaker made of original parts. It was named A-8 and marketed in Japan under the Pioneer brand. It later became the origin of the HiFi ...
[ Read More ]
- Liner Notes
- "What was striking about both the M-22 and M-25 amplifiers was, of course, their appearance. Practically all amplifiers in the late 1970s and early 1980s were fully enclosed by sheetmetal on all sides, with a ventilated cover. Pioneer took the minimalist approach, indeed, a purely industrial design approach to the design of these amplifiers. All the key components were visible, with the left and right channel components grouped in a mirror image. This really appealed to audiophiles who truly are intrigued by the "innards" of their electronic components." -stereonomono
- Packing
- Prepare to be impressed. We have arguably the best packing process around. This piece will ship double-boxed, and fully insulated, taking extra care to ensure there's no pressure against the face. First, the component is first wrapped in 8mil plastic. Then, the unit is strapped to a plate inside an inner box to prevent shifting, and padded on all sides. We then suspend the inner box inside a double-walled outer box using shock-resistant foam corners.
- Shipping
- This piece ships to the contiguous United States for a flat rate of $150, 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.
- 7978673995997
One of the most sought-after vintage pieces, period, the Pioneer M-22 was in a class all its own. Introduced in 1976, the M-22 was the crown jewel of Pioneer's legendary "Series 20" lineup. This was at the height of the 'Wattage Wars," yet Pioneer confidently presented this amp to serious listeners who cared about other specs - clarity. At full power, this compelling Class A design delivers 10-30,000Hz response with less than 0.01% distortion. This piece is in top shape electronically, and performed well in our bench tests. If you look very closely, you'll see the front badge has a few nicks, but fade from a listening position. We're sure you'll fall in love with the sound of this amp, just be ready to answer the question, "What is that?"
Production
1976-80
Condition
8/10
Serial No.
WG1003957
Orig. MSRP
$499
Restoration
- Full 30-point service check
- Replaced output transistors
- Replaced two leaking caps
- Repainted transformers and heat sinks
- Cleaned controls, switches, and chassis
Specs
Type Solid state power amplifier
Architecture Class A
Power output 30 Wpc > 8Ω (stereo)
Frequency response 10Hz to 30kHz
Total harmonic distortion 0.01%
Damping factor 60
Input sensitivity 1V
Speaker load impedance 8Ω (minimum)
Semiconductors 44 x transistors, 66 x diodes
Dimensions 16.5"W x 6"H x 14.6"D
Weight 49 lbs.
Documentation
Pioneer M22 Owner's Manual
Pioneer M22 Schematic
The History of Pioneer
Pioneer was founded by Nozomu Matsumoto in 1938 in Tokyo as a radio and speaker repair shop. In December 1953 Mr. Nozomu Matsumoto succeeded in developing the first domestic dynamic speaker made of original parts. It was named A-8 and marketed in Japan under the Pioneer brand. It later became the origin of the HiFi ...
[ Read More ]
Liner Notes
"What was striking about both the M-22 and M-25 amplifiers was, of course, their appearance. Practically all amplifiers in the late 1970s and early 1980s were fully enclosed by sheetmetal on all sides, with a ventilated cover. Pioneer took the minimalist approach, indeed, a purely industrial design approach to the design of these amplifiers. All the key components were visible, with the left and right channel components grouped in a mirror image. This really appealed to audiophiles who truly are intrigued by the "innards" of their electronic components." -stereonomono
Packing
Prepare to be impressed. We have arguably the best packing process around. This piece will ship double-boxed, and fully insulated, taking extra care to ensure there's no pressure against the face. First, the component is first wrapped in 8mil plastic. Then, the unit is strapped to a plate inside an inner box to prevent shifting, and padded on all sides. We then suspend the inner box inside a double-walled outer box using shock-resistant foam corners.
Shipping
This piece ships to the contiguous United States for a flat rate of $150, 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.
7978673995997
