Am the original owner purchased in 70's. Moved up to bigger, more expensive amps but kept this because it sounded so good. Wanted to upgrade it and eventually sell. Work was done about 1 year ago. It needed new power supply caps and all new power supply components. Cornell Dublier filter caps with much better ESR. New Vishay fast recovery rectifiers with bypass caps on each. Replaced all the p/s components. I would have done more but it didn't need it. Sounds better than I remember it. Repaired the record player ground on back. Did not need cleaning or spraying DeOxit on controls. Has 2 small areas with marks shown it pics. I reset the bias and both channels are identical. Comes with a Service Manual CD. I work on electronics as a profession when I was working and as a hobby now retired.
When I bought this I had the choice of the higher models but for the speakers I had, and was only using records then, it sounded nearly equal to the others. One review I read said the A-10 had a stepped attenuator type volume control which I found was untrue. Power ratings vary by rating method or reviewer. I would categorize this amp at 50 to 60 watts RMS especially with the upgraded power supply. I had the volume control at about 1/4 it's useable range, it never ran hot using it with 2-way and 3-way closed and vented speakers. And, it has NO IC's to degrade the sound. The boards are all made by Toshiba which is another plus.
Everything it came with plus CD of Service Manual. Covered in a heavy plastic bag then packaged.
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Onkyo A-5 Integrated Amplifier with New (but tested over time) power section - Bidding Log