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  1. #1

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    Oct 2013
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    Cool RM6000 set's subwoofer suddenly began to hum loudly

    My subwoofer is ailing. Yesterday, while I was listening to a video, the volume suddenly got real loud and then my subwoofer started to hum ( like when a microphone or something feeds back) and it still does this even with my Denon AVR off. I tried the "cheater plug" trick to remove the ground from the 120-V source of power, but no go; still hums loudly! Please help.

    Brett

  2. #2
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    Jul 2001
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    Polk Audio
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    Hello Brett,
    I'm sorry you're having a problem. It would be best to telephone Polk's CS department at: 1-800-377-7655 or send them an email to: polkcs@polkaudio.com. Be sure to have the unit's serial number and date and place of purchase handy if you call.
    Regards, Ken

  3. #3

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    Sep 2013
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    23

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    Make sure all subwoofer signal connections are securely plugged in.

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