Question about Acoustic Research S108PS Subwoofer

3 Answers

Acoustic research subwoofer s108ps has a burnt capacitor

Hello, thank you for your willingness to help.
Problem: subwoofer Acoustic Research s108ps has a burnt capacitor right by the speaker terminals (parallel connected) . It has a rubber (dielectric) base that looks like a small black disk about 3 mm tall and 6mm in diameter and a few loops of a thin grey foil. This foil is partly destroyed. I tried to unwind it and a portion of it fell off the capacitor. The sub started making sound (before that it was making low level distortion noise) but only at about 40% of its normal capacity.
Can you please, tell me where I could find the specs of this capacitor and buy it. An electrical diagram of this sub would be most helpful. I can take a picture of this part and email it to you, if need be.
thank you very much !

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  • 2 more comments 
  • gsergei Jun 16, 2008

    this option has already been exercised.
    They want to know the specs. The cap either doesn't have a shell with printed info, or is something very specific. All I can see is a foil.

  • gsergei Jun 16, 2008

    Acoustic people have gone out of business sometime ago. I don't have the manual to identify their phone #s.

  • gsergei Jun 18, 2008

    I've figured out the burnt cap must be between 10 to 20 uF x 50V.
    Please, close my thread. This web resource has been unable to help me.


  • gsergei Jun 21, 2008

    I have put in a 20uF x 50V capacitor and the subwoofer Acoustic Research s108ps is back in business !!!

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3 Answers

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  • Master
  • 4,234 Answers

I believe that the amp sections for these subs was made by JBL. I'll check into this further and try to get you the replacement cap info.

Stay tuned.
Dan

Posted on Jun 16, 2008

  • ABRsvcs Jun 23, 2008

    Thanks for the update. Hopefully this information will be usefull for someone else as well.



    Dan

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  • Master
  • 2,712 Answers

If you can get the burnt capacitor off the board, do so and simply take it to a local electronics store. They will be able to identify the specs and provide you a replacement.

Unfortunately, I am unable to locate the schematics for this sub.. Will post back if find it.

Hope that helps :) Please take a moment to "Accept" this solution, if you found it helpful..

Posted on Jun 15, 2008

  • Swilin Sampson
    Swilin Sampson Jun 16, 2008

    Is it possible for you to post a pic of the faulty capacitor here?

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  • Master
  • 3,422 Answers

HI,

I'll let you know if the service manual is available for this model.

Posted on Jun 15, 2008

  • Priya darshan Jun 15, 2008

    Well there is no wiring diagram or a service maual available for this model.So the best solution to fix your problem is to contact the Acoustic people and ask them to email you a copy of it.

    The other way is to go to www.radioshack.com and contact them via email or it is better to call them up at 800.843.7422 just tell them that you need the capacitor for your model and they will give you the right part.

    Another best website to buy the capacitors ishttp://www.partsexpress.com/

    If you need anymore help let me know.






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