QUOTE(munak991 @ Nov 5 2012, 11:43 PM)
Saw alot of people use Dynamat
Hmmm, previously i got my car side door speaker and rear speaker when it is too loud the whole dashboard vibrate can a sound proof prevent that?
You'll need to have a budget in mind when come to soundproofing.
Deal with your source of noise instead of follow whatever people say.
It seems that your car doors rattle when music go loud, so you may consider door dampening.
There are different way of dealing with door soundproofing, basically all you need to do it to dampen and then do sound insulation. (Of course, depend on your budget too~)
I would suggest you to do the front door soundproof first. At least you can feel the effect immediately.
There are so many brands out there for you to choose from. Budget counts and definitely applying it the correct way counts too.
If you are hesitant on DIY, then get some skilled installer to do it.
Do take note as well that, some unheard of brand out there are basically just a waste of money. Seen it, tested it and already throw away.