So i install a set of rear speakers on my coupe ! You know a good acceptable set of Xplods 6x9. But they rattle too much. So i tough it was the speakers! took them out and stall them on an Eclipse... they worked fine took them back and intall them back on my balt... I EVEN BOUGHT THOSE SOUND MATS THINGS FROM BESTBUY!! but still rattleing... And still havent be able to figure out where is it coming form....