i had 2 10'' infinity kappa perfect 10.1d subs/ 800 watts in my jeep (now my sisters car). it weighed a lot! IMO. i knew it would work in my bimmer but it would add weight, and also have hardly any trunk space... i have the HK 10 speaker stereo, but it does lack some bass. ive been thinking about the amp/sub from bavauto...has anyone heard anything about that. thanx!!!