well the guy had 2 of the soundstream 4000 amps on 4-15's in his avalache and i metered it on the termlab and he was hittin 152.1, so he knows what loud is and i already told him that he wasn't gonna get the same performance because of the the car being a converible, but i was gonna try to get him as loud i as i can. i can make his trunk rattle thats easy but i want to get it loud in the cab as well, and i don't care about the roof tearing. he's already aware of what may happen, now it my job to get them to happen. also how are those sa's musicly? can they get loud and still sound good?