I'm really thinking about replacing the speakers in the rear deck because they make that farting sound when i have the music up. Is it easy to replace them and do you guys think it is easy enough to do it myself? Also, I have a phoenix gold amp and 2 aluminum 12" eclipse subs. I want to hook up the amp and only one of the subs as i really dont need that much bass. Do any of you know if this is easy to do or will i need some sort of converter? I really dont want them screweing around with the Nav unit too much if they have to hook up wires behind it.