ok so. the 8 L7 doesn't handle as much rms power as the 10 or 12. in fact it handles the same power as the 10 L5. if you are looking for a speaker to fit behind your seat, dont get a solobaric. yes they make the small box and the sub is powerful, but they sound like ass. you will not be happy. kicker makes a line of shallow subs called CVT that sound good and are less expensive than the L series. other companies make shallow subs to, just find something that you can HEAR before you buy and the 10 L5 you can hear at any circuit city's thunp room