brown bread vs dynamat

I used dynamate on my truck's cargo area floor and rear door and it did wonders for my sound. Really reduces the rattle that you get from hard hitting subs. I've also used some stuff that I got from home depot thats used for reducing vibration in air conditioning vents.  I used that on the front floor ,lower door panels of my truck, and the rear cargo area(before I laid down dynamate) and that helped out with road noise as well. The stuff cost about $15 for a roll that like 5 feet long.  I think the combination of that stuff plus the dynamate in the rear really help out the performace of my system.live & die 4 tha luv of BASS!!!!