Just picked up my car from Doran yesterday. They installed 2 Kicker S15L7s and a US Amps 2000X along with a 4-channel US Amps TU-4360 amplifier. This thing sounds crazy now. Will get measured soon but they say high 140s maybe 150 dBs. This set-up weighs quite a bit. I can really feel the difference in acceleration. I guess I wont be racing as much now =/.. I try and post some pics soon.