I would agree with any JL AUDIO sub to be very clean and deep bass. if you want a real system that is.

Audibahn hits hard and Kicker USED to hit hard but dont touch them now lots of shops stopped carrying them because their quality went down and they have had lots of problems. Infinity Perfects are pretty deep also, pretty efficient also.

-Jason

Jason 00 Audi S4, 2.7 Bi-turbo quattro 01 S10 Xtreme, 4.3l 98' Contour SE with some mods 96 Cavalier (beater)