i Have an 89 s10 blazer with 2-15" mtx 8500 (yeah there not the best but i got them cheap) about 250 each on ebay. Each has its own profile ca 600 bridgedso its supposed to be 450, it doesnt rattle that bad the only thing that does rattle is the rear lock, and the roof a little bit. The acoustics are a hell of a lot better than a car with a trunk.