on ebay i can get a bulk pack (36 sq ft) of dynamat extreme for 120.90 (including shipping) which is about 130 bucks cheaper than msrp. installation is no problem, and the bulk pack will be all the dynamat i'll ever need.... the vibrations bother me pretty badly.... with no bass turned on it sounds terrible, but with bass all that i can say is

my speakers are almost a complete waste of money, and i don't dream of getting a 4-channel amp to push them if all i'm gonna hear is blummmmmmmmmmmp from the doors....