Well lets get a few things out in the clear... it was a 155.5 to music car off and with 2 btl 18's and did a 153.8 at 34 hertz. so overall 2 BTL 18's against 4 and 20,000 against 6,000 and also you had about 4 times the electrical system. now you are doing it from the rear which I will give you...