It must be a combination. Some of the song having ****** bass mixing and accoustics of a sedan. I've deadened what I could without taking the whole **** car apart with Roadkill. I've got it on both front doors, enough of the rear deck and what I could of the trunk (a fair amount of the bottom half of the trunk lid is covered with thick wires and **** I couldn't get it under so I just got it around it lol) so some rattles or what have you are prob escaping adding to it. And Jeff, it is def isn't clipping, my previous amp was nice enough to show me how that sounds. Most of my music sounds awesome, and the few rap songs like this one sound bad even at lower volumes. Metal bass comes in punchy and clear, just how it should //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif