ok i have a loud system in my car and i happen to think it is pretty decent. i won't call it great but i am also not done with it yet. i have 4 rockford fosgate HE2 12"s in a single chamber custom built 4 12"s box. i am running 1 thousand watt rockford fosgate class DB amplifier. i have everything else in my car ripped out and put in after market speakers. my friend seems to think that my system is a crappy one....do you agree or disagree.. also if this helps your judgement any i tested the db level and i hit 156.