[VS3800]

Hey guys and gals, i had an accident a while ago, and the shock killed my hu, so i ended up scoring a new kenwood one for nothing, so i whacked that in and it doesnt have an adjustable sub control on it, so it doesnt pump like it used to Just wondering if anyone knows anything about setting up gains etc and doing a bit of tuning on the amp...not sure but it should be able to get where it was before. Pics and details of the install are in the club rides section, but basically its a 2x150wrms response amp bridged and running 500wrms to the kenwood dual voice coul sub, its 380wrms and gets shat on by smaller power subs and its really dissapointing Also the amp is hard to get to, so i cant be bothered getting to it, unless someone thinks itll make a difference! Thanks people It also could be the box, but does having a different shaped box make a difference to sound? Its built to the exact specified volume and so is the port so buggered if know
Cheers