I'm running the BSW 8" sub kit in the back... and it's definitely 100% better than the stock DSP setup. But I'm used to a 12" Ascendant Audio Havoc... sooooo not sure how long the BSW kit will inhabit the vehicle.

I do like how stealthy it is though. Hell it's so stealthy, that I didn't even realize it was in the truck when I bought it a month ago. It was tuned (and installed) so poorly it made no audible difference. Found it when picking up supplies for the trip back and going to stow them in the cubby.

__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)