Need help with DSWPRO550wi

Omac4

Novice Member
I've had the Polk dsw pro 550wi for about 3 months now and has worked great up until today. I have it hooked up with a monster cable sub cable and plugged into a Yamaha RX-A1020.
The problem started today when I was watching a movie and out of no where the subwoofer produced a loud scratching noise. It sounded like an amplified sound of an old turntable as it scratched a vinyl disc. It happens randomly and it's very loud. It also made the noise when the subwoofer was in standby mode. I've tried adjusting the setting on the Receiver and cleaning the connectors but so far no luck. Anything will help at those point.
 

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