I am running one of these and I get feedback through my subs when a CD is loading, it sounds like the subs are humming. I can listen to the radio and the USB, flash drive, without any feedback from my subs, I was wondering if anyone else has experienced this type of problem with this HU and if so what did you do to get rid of the feedback. As I said it is only when loading a CD and when changing tracks on a CD. The other sources USB, AUX, and radio are noise free. I changed out my RCA's so it is not that and I added another ground to the back of the radio so it is not that. Any help would be appreciated.