im sure you can never have enough but how much is adequate?
i want to do the trunk my subs are making some bad rattles.
i got 4 4sq ft packs of dynamat extreme, what are the areas i should pay attention to when applying it

 

well i dunno exactly how much is enough but i thought i'd let you know of some lower priced alternatives.

http://www.cureline.net/lex/raamsale.htm
www.fatmat.com

 

the more the merrier>

 

...the more the heavier

 

Just put on small amount until the rattle goes away. Then you know you've got enough on. You don;t want to waste it by putting too much.