sound proofing car?, wanna get rid of the rattle Options

[96stgreendemon]

so i just got some nice alpine type s speakers and i really want them to sound as good as they can, so i decided i may soundproof my car or at least try to reduce my rattle, does anyone know if that great stuff foam will work for this? and please dont smack me for this, just an idea

[chacha]

it works and it doesn't....i sound proof my whole car it is doesn't seem to work too well. i still get rattles and noises. you just need to find out where it is coming from....if it is the doors, you might need to adjust your door height to close better, adjust the windows and tighten the bolts and screws...heck, try getting some weatherstrips to replace the old one so when driving, the wind doesn't get in and cause more vibration