Sorry guys. Alright heres a better post. Within the next month, I'm either getting a 2008 vw Passat or a 2010 Mazda 3. In it, I plan on getting 4 alpine type s component speakers, tweeters and crossovers with whatever headunit I get powering them. Now for my subwoofer, I've been looking at getting 1 nice subwoofer. As of current, the subs I'm looking at are a 12" Dc Lvl 4 subwoofer, a 12" Fi Q fully loaded Subwoofer, or a 12" Fi BL fully loaded subwoofer. As of right now, I've been leaning towards Fi. I'm just wondering though, whats the major difference between the BL and the Q because I noticed the BL is more expensive but the Q and Bl are both 1000 Rms of power. If someone could tell me the differnce I would appreciate it.