BloodyGuts335i 10+ year member
Team DC
it also depends on how much power you runnig. in my car I have about 2500 watts and it rattles even with 2 layers of sound deadning (**** rear deck lid) and in my gf's car i have about 800 watts with no sound deadning at all and her car dont rattle for sh*t ( I hate on her car for that) and my car is newer by 10 years..lol