some companies are good about that, but not a lot of them..... As for MA Audio, I have only dealt with their subs, which suck IMHO. A few good choices for that w7 are Hifonics Brutus BX2200D, Phoenix Gold Xenon, Zapco C2K-9.0X, JL 1000/1 and a couple others that I can't think of right now, trying to think on 3 hours sleep. I'll come back later after some sleep....
