Hey everyone, I recently put a Kicker CompR 10" Sub in the back of my liberty, and when turned up even slightly, the rear end vibrates and just sounds terrible. From the outside, the rear glass vibrates, causing the tailgate and bumpers to vibrate, and in the corners of the bumper (both sides) it sounds almost like something is flapping around when the subwoofer hits. I tried feeling around in the bumper, and could feel something vibrating, but couldnt tell what it was. I ordered 13 square feet of Second Skin Damplifier Pro yesterday, and am hoping to install it when it gets here, but don't know where would be the best place to put it. If anyone knows anything about sound deadening or the rattles I hear, I would appreciate it greatly if you could give me some advice

_________________
2006 Jeep KJ
-Skid Plates I ripped off a dead renegade at a junkyard
-JVC KD-R760 Head Unit
-Kicker CompR 10" Subwoofer w/ Alpine 500w RMS Amp