Okay heres the deal im using 2 jl audio 10w3's and a 500/1. I setup everything in my friends mustang and i built the box thats in it now. Problem is it sounds like ****, now i know these subs can hit because the 2 in my truck that are in prowedges( which also could hit harder but im too busy). And i want a design that will hit hard and loud because thats what he wants. I am not sure what to do, or what to adjust the amp at. please help.