Anyone bypass the factory amp instead of using one of those interfaces? I have an 05 Ram Laramie w/ 7 speaker infinity and amp and I hooked up my aftermarket Head unit using the interface and it sounds like crap. I know you can adjust the interface modules but it still sounds like crap! if I bypass the amp will I need to hook up the PCI BUS wire to something else will it affect my computer system? Can anyone help me?