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I have a JBL sub300, Humming & burnt board

I have a JBL sub300, part of the JBL home speaker set SCS300.7. The subwoofer has developed a hum, and in looking at the amp board, there is a large hot spot.
I'm trying to find a replacement board. The numbers on the board are 104SUB15000 V06 & SCS150PW
Any suggestions on board replacement or repair?

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  • Anonymous Apr 17, 2009

    I have the exact same problem. Any luck in finding a replacement? My subwoofer stopped working.

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freetek
  • 5568 Answers

SOURCE: jbl sub300 has developed humming sound

Make sure all of your cables are seated well; this can come from poor shielding of low-level audio cables. If all seems in order, then the power supply for the subwoofer has poor filtering that can come from a failing electrolytic capacitor.
If you plan on DIY service, here is a link to the manual:
JBL Sub300 manual
It is said to be 60 pages long.

Posted on Oct 17, 2009

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