Report "I have hooked up my subwoofer and amp to my factory stereo in a 2011 camry. My power wire is hooked directly up to my battery, my ground to the chassis and my remote to my fuse. I have my RCA wires (RCA on one end and speaker wire on the opposite ends) tied into the factory's rear speakers. Everything is sounding alright at a low volume, but when I turn the volume up, the stereo cuts out and I get an incredible loud humming from the subwoofers. I have tried a few different settings on my amp and trying to tie into the rear speakers different ways and the results vary a little, but I keep getting this terrible feedback. Does anyone out there have any ideas???"