well kicker makes sub insane subs and bass to go along with it ..You will get decent bass out of 8 inches but i would suggest you get at least 10 or 12 inches...belive me you will be much happier..i remember when i got 10's for the first time and i was like man i want more bass so i ended u getting 12's at the end.... But first go and listen to them at the store before you go out and buy them.. good luck.
