Used but tested and works great

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This amplifier has just gone through an extensive rebuild. The amp was disassembled and thoroughly cleaned. All resistors, diodes and transistors were tested and replaced if they fell outside of specification. All the electrolytic capacitors were replaced including the filter capacitors, using Nichicon, Chemi-Con and Wima Capacitors. The larger capacitors were installed with PCB safe silicon to prevent movement during transportation thus eliminating potential shorts. The protection relay was replaced with a new Omron relay. All of the output transistors were tested for proper operation. The volume potentiometers were cleaned and lubricated and tested for correct ohm range. The solder joints for components that were not replaced or removed were re-soldered to eliminate any cold or cracked joints. The LED lights were tested for proper operation. The BIAS was set per the service manual and then monitored during the breaking period of the next 40 hours. This has a great Yamaha sound and is ready for another 39 years of great music Specifications Power output: 170 watts per channel into 8 (stereo), 500 watts into 8 (mono) Frequency response: 10Hz to 50kHz Total harmonic distortion: 0.007% Damping factor: 110 Gain: 28.3 dB Input sensitivity: 1.23V Signal to noise ratio: 115dB Speaker load impedance: 4 (minimum) Dimensions: 480 x 132 x 423mm Weight: 19kg (42lbs) Year: 1985 This amplifier will be double boxed to prevent any damages during transportation. I take much pride in the amplifiers and receivers I rebuild and take the same care and pride when preparing them for shipping . Thank you for taking the time to look at my amplifier.

Yamaha P2250 Professional Stereo Power Amplifier Pulled working from a retired university sound system. Be sure to examine each picture to ensure you are buying what you need. Always go by part number, not model or board number Need faster shipping? Message us. Well work with you. AS WITH ANY USED ITEM, THERE MAY BE SCRATCHES, DENTS, AND OTHER SIGNS OF WEAR UNLESS SPECIFIED NEW. Questions welcomed. Thanks for looking!

Yamaha Service Manual. schematic