Onkyo M-501 - STEREO POWER AMPLIFIER - 150 watts per channel, Japan 1996

For Sale: Working 100% high power classic power amp in nice condition.  Made in Japan around 1996.

The only thing the stops this from being in mint shape (IMO) is a small mark on the top near front, see photo. Not sure what it is but possibly glue residue. It's not too obvious and if you stack this with other components it won't really be visible as you can see in the video.

Perfect sound quality. All three buttons are working correctly, all LED indicators are good, headphone jack is good. Wired R1 remote jacks are working. All four speaker outputs are good. No issues.

YouTube demo video here: https://www.youtube.com/watch?v=l2JO0TfDyws

• Power Output: 150 Watts RMS per channel into 8 ohms (stereo)
• Frequency Response: 5Hz to 100kHz
• Total Harmonic Distortion (THD): 0.09Damping Factor: 60 at 8
  Signal to Noise Ratio: 100d
• Input Sensitivity: 1V
• Dimensions: 455 x 150 x 350mm (17-15/16" x 5-7/8" x 13-3/4")
• Weight: 10.5kg (23.1 lbs)

Email me for higher resolution and/or additional photos.

Contact me for ship estimate - should be between around $10.99 and $19.99 if you in the lower 48 US states. (Feb. 2026).