i have a kicker 1000xz amp. and i have two 15" kicker comps. and the amp works just fine. i can turn it up and no problems. but when i hook it up to only one l7 15", the amp just cuts off before the sub starts to move.. why? is it cause the sub is to powerful for the amp???? i didn't have this problem before. you can move the sub, so the sub isn't busted.