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SA-8500 Volume / Balance pot replacement

Discussion in 'Pioneer Audio' started by zaibatsu, Sep 21, 2017.

  1. zaibatsu

    zaibatsu Well-Known Member

    Anyone know where I could find one of these?

    Concentric volume/balance with loudness tap. Pot is physically broken (cracked through through all boards) so there's no saving it.

    I'm guessing it's pretty unobtainium but worth asking just in case. I know it could be replaced with just a volume pot to keep the amp going but it'd be cool to get it back to factory spec if possible.

    pot1.jpg pot2.jpg


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  2. amr2

    amr2 Well-Known Member

    Hello. Have you found any solution? I have the same problem...
  3. markthefixer

    markthefixer On Hiatus, dealing with Dad's estate full time Subscriber

    acv-407 from the picture
    four section pot - THAT'S very unusual 2 x 250k HB (balance) taper, 2 x 100k B (volume) taper volume and balance.
    Pioneer parts database no longer recognizes part number acv-407 so we no longer have easy access to the other models it is used in.

    The only sources are now just donor units - SA-8500 and SA-7500(verified)
  4. Watthour

    Watthour Electron Rancher - JS3600

    Short of harvesting boards from other single- or dual-gang pots and retaining the original hardware, a take-out from a donor unit may be the only alternative.
  5. amr2

    amr2 Well-Known Member

    This could be an option

    2 x 100k B (volume) -> Linear taper for volume?
  6. slayer44

    slayer44 AK Subscriber Subscriber

    Bethel, Vermont
    I have one...PM me if interested.

    Attached Files:


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