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Pioneer M22 Class A amplifier - $1,100
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This unit is the 100V version and should be operated with a 120 to 100 voltage converter. It will operate on 120V, but it is not recommended for extended use as this can damage the internal components. Has been stored in a controlled environment and used once for a few minutes since I purchased to make sure it worked. I did have the unit inspected and serviced by Alex Audio and Video earlier this year to ensure all is ok before I sold.
From the Vintage Knob:
The Pioneer M-22 is the original power amplifier from the Series 20 : old style Class A with no circuit trickery or audiophile touches - except where it really counts : power transformers, capacitors, resistors, chassis and ground paths.
The M-22 is a sound bolid.
"Open-guts" style with massive diecast heatsinks and chassis, four 33,000µF caps, full dual-mono layout.
If you don't mind having loudspeaker cables running in front of your rig... not very tidy.
But if you have an M-22 just for its sound qualities... all's fine : good-looking box that acts as room-heater on the side and ultimately makes wonderful music.
Class A power : 2x 30W (20Hz...20Khz, 8 Ohm)
2x 30W (10Hz...30Khz, 4 Ohm)
THD : < 0,01% (10Hz...30Khz, 8 Ohm, rated power)
< 0,005% (10Hz...30Khz, 8 Ohm, 15W)
< 0,005% (10Hz...30Khz, 8 Ohm, 1W)
IMD : < 0,01% (20Hz...20Khz, 8 Ohm)
Power bandwidth : 10Hz...30Khz (full power)
Frequency response : 2Hz...150Khz (+0 / -1dB)
S/N ratio : 106dB
Damping factor : 60 (20Hz...20Khz)
Inputs : 1V / 50kOhm
PC : 280W (original models)
240W (export models)
Dimensions : 42 x 15,3 x 37cm
Weight : 22kg.