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Sansui Amp After no use for many years, I'm trying to get my Sansui A909 amp to work. At first it seemed fine, but after very little use it started making a loud pop noise and then nothing. Now it operates for about 10 seconds, POP, and silence. I turn it off and then on again and nothing. If I go back later, it will start up agian and works for about 10 seconds, the the same thing. Over heating? Blowing a fuse that resets?

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  • 979 Answers

Bad supply capacitors...accordianman

Posted on Mar 09, 2008


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Jun 05, 2008 | Sansui Audio & Video Receivers

1 Answer

I own a classic Sansui intergrated amplifier (AU-717). It has a short in one channel. At low volume, the sound shorts out. I've had this unit for about 20 years now. Otherwise, it's a great product!


Hi mellemcee


Cool amp mate, and becoming collectable now to. Sansui amps from the era where the best in the world of HiFi. iT may have lost bias control to the offending channel, it may have dirty source switches, tape monitor switch, or even speaker switching. The speaker protection relay may also have a dirty contact, will usually burst back into life with a quick rotation of the vol control. Can you pin the problem down a little more with the info i have given you, try all the controls to see if it impacts on operations, you will need to fix those problems first. Low bias would make that channel sound distorted at low levels also. Is this what is happening to you??

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Apr 18, 2008 | Audio & Video Receivers

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Sansui AU 3900 vintage 1974


Try rick at stereomanuals.com
The shutdown would be from a voltage supply in the power amp seeing too heavy a load and "shutting down" so that the amp doesnt Fry

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