Its a rockford fosgate t1500 amp, the altanator and battery are fine, i have an extra battery run to help, and using 0 gauge from batterty to second batt. and 4 gauge to amp. my box is perted but its not made custom to the kicker l7s. its straight off the shelf like a regular old box, so i was thinking if i had a bigger box built it would sound a heck of a lot better, which is wat i was told anyways. So i was wondering if anyone with a trepid has a monster system and if it is possible to use the whole trunk to make box and would it make a big difference??