First let my say that I am a sorry for posting another Mach 460 replacement thread, but I still can't find the right answers. I have the seperate head unit and cd player in my 98 GT. The spit out button on my cd player isn't working so I can't change cd's. I am thinking about getting a single head unit that plays mp3s and all that good stuff. I really like the sound of the Mach 460 systems. So my question is can you reuse the factory amps and speakers? If not, what is the best way to replace the factory stuff with equal equipment that will sound about the same? I am trying to avoid the big sub and amp in the truck. I appreciate and help. Thanks.