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Pioneer SA-9500 Extremely Loud Crackling

Im not sure if it is worth my time or money to get this fixed. I would prefer to do it myself if I knew what the problem was...

Anyway this AMP randomly crackles to the point of blowing your ear drums out. Not music just crackles, this will happen even without anything being played through the AMP.


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  • Michael Boyea Dec 20, 2008

    Im off to Radio Shack to get the cleaner... I will let you know how this works out! Thanks

  • weirdal May 11, 2010

    Is the crackling noise in one channel or both? If the problem is in both channels, then it is probably a dirty control switch. You will need to open up the case to spray cleaner on the contacts. I can't remember if the Pioneer 9500 used open frame or sealed pots & selector switches so you might have to find an access hole to spray the cleaner (like Deoxit). You should also clean the various switches like mono/stereo, low&high pass filters and tape monitor selectors.

    If the problem persists, head over to and post there. Somebody like Echowars should be able to help pinpoint the problem.



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The volume control and tone controls are dirty as well as the selection switch. This is common for older units. These controls and switches need to be cleaned with an electronic switch cleaner which should be available from an electronics store. Spray each control/switch and work them (turn repeatedly). Repeat this procedure a number of times and the accumulated dust/dirt will be cleaned and the unit should no longer have the problem.

Please note that it is possible that there is a transistor or 2 that are breaking down that can cause this as well. If the cleaning does not resolve the problem, let us know.


Posted on Dec 19, 2008

  • allan1836 Dec 08, 2010

    I had a similar crackling sound problem with my sa-9500II. I cleaned every pot with contact cleaner to no avail. I send it to my tech and he saw 2 leaky transistors and some small caps in the pre amp section as the culprit. It's now playing quietly and sweetly again.



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