I agree with that. I striped my entire interior and layed down roofing tar on the floor, doors, roof, trunk. Bass got sooo much better then I went to the local home depot and picked up 3/4" underlay (the stuff you put under carpeting so you cant hear whats going on in the basement or whats happening upstars) so I put all that down then put my interior back together tight. No more rattles, ALOT less road noise and bass perfection!! I had 2 pioneer 12's (pieces of shit) runnin on a 800 watt orion and ppl could hear me comming 2 km away! No bullsh*t. I went to fill up with gas one time and the owner came out to ask me to "please turn it down" cause apparently I was rattling stuff inside the store
This one is taken from the trunk ^. I didnt take the dash off at that point