Yeah, I'm not overly impressed with the BSW 8" stealth sub. It does okay, but can not handle lows very well at all past a certain volume. 80-120hz it handles very well though. So some music sounds amazing... and others (R&B, Hip Hop, House, Dub Step, etc) sound less than stellar.

I'm going to do something custom for a sub solution in the future, but I don't have the time to mess with something that works decently for the moment.

__________________
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)