Burmester 3D (or standard) Sound Deadening
I also have the upgraded 3D Burmester, but I don't notice any bad rattles other than the spare change sitting in my cup holder. There was a time in my young years when I built my own subwoofer into a spare tire well in my Subaru and I applied Dynamat to almost all the panels which killed the rattles but added a 100 pounds to my car's weight. My underpowered Subaru felt the weight
I also have the upgraded 3D Burmester, but I don't notice any bad rattles other than the spare change sitting in my cup holder. There was a time in my young years when I built my own subwoofer into a spare tire well in my Subaru and I applied Dynamat to almost all the panels which killed the rattles but added a 100 pounds to my car's weight. My underpowered Subaru felt the weight 








