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Discussion Starter · #1 ·
This isnt a typical ground loop issue that I know about so figured I would ask the experts on here what they thought.


I get a buzzing sound from the sub when plugged into the wall even when I dont have any other cable attached to it. When I check the front of the sub the cone is vibrating....


When I adjust the volume knob the hum/buzz gets louder. Ive moved it around the house and still have a buzz where ever I plug it in. Its a two prong plug in so I cant really use a cheater plug. Im pretty sure I dont have bad power as I dont get any humming from my speakers or anything else.


You guys think the sub is bad and need to send it back to Polk?
 

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your wiring is not grounded properly.
 
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