Question about Wharfedale PowerCube PC-12 Subwoofer

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Loud steady sound when turned on

Dear Experts,

I had this problem with my PC-12 recently... upon switching the power on, there are some hissing sound for about 2~3 sec then the steady loud roar will reproduced afterwards. The loudness cannot be controlled by the volume and even though there are no inputs to the sub, this problem still persists. Is my PC-12 grounded or any of the transistors / capacitors gave in? Pls advise on how to troubleshoot this problem.

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Re: Loud steady sound when turned on

If it's a humming noise you are describing, then it may be that one of the power supply filter capacitors has failed. Of course it could be some other sort of power supply problem as well.

Posted on Dec 16, 2007

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