So I upgraded my 06 FX4 SS today with the Saleen/Rockford Amp & Sub. Originally I had the OEM 8" sub & amp. Once it was all said and done the dam thing would not bump hard at all. I have done some reading here and read that the factory Audiophile radio I have is not compatable with the Saleen/Rockford set up. Is this true? If so would a Shaker 500 solve my problem? I guessing it will give it even more bump than a regualar non audiophile head unit huh?

Thanks