If you listen to alot of different music some Audiobahn AW1251 SE (dual 4 OHM 400 watts) 12" subs in a sealed, ported, bandpass, free air..whatever, they are the most versitile(sp) I've seen. They are pretty much perfect for all box applications and music types whether it be country, rock, rap or metal. For about 100.00 or less a sub they are really good. If you really want some BOOM the ALUM10N Bolt tight motor 10" Dual 6 OHM 800 watts RMS retail about 200 a sub, but they carry a new feature, you can actulaly buy a replacement cone package for these new subs for a bout 50.00 so if you "accidently" blow the cone you can replace it at a fraction of the cost of the sub (and you can do it at home). LOL! You can tell I sell Audiobahn.