i used to have a very nice system. 4 jl audio 12w6s with 2 ppi a600s pushing them and 3 sets of infinti kappa mids and high being pushed by a ppi a404 which i also still have. this system when taken to first compition hit a 159.3 which almost made me shit myself. then i spent a shit load of money sound deading the car with dyna mat and road kill foam spray and with some small tweaks and a few more pieces helped me get a 161.0. and after that i stopped wasting all of money on the damn thing. i drpped 2 12s and went to 2 sets of mids and highs and was happy just the same. now i have mids and highs and thats it but its light weight and baby thats what really counts now