I like my subs a lot. 450 a pair, handle 1500 rms easy a piece, sound **** fine to me and I've never had anyone tell me otherwise (although I'm sure there are people in this board who could). Having said that, just bought a 15 xxx to replace them (c'mon, it's a xxx). I also know a guy who has 2 PL12d4 in a ported box in his sentra, with the port running through the rear deck. With DB 1200 watt amp cranks out well over 143 db new TL. It's sick, his front window pulls about an inch both ways. He also has DB Components (he works at a DB shop), sound pretty decent, although not my fav. Check out something else for components, the lower MB quarts aren't too bad. The shop rocks though, def. best in omaha for installs. Whoo soundwaves!