question if i change
 

this question has prob. already been asked but if i change the cd player i have to change the speakers right and is that all i dont have to change the wiring or any thing ealts right just take the old one out and put in the new speakers

why would you need to change the speakers?

THe answer obviously is NO. But im curious as to why you would think you have to.

i have the bose system and i was told to put an aftermarket cd player i would have to change the whole system i only have one speaker working so they need to be changed.

You'll need the Scosche adaptor. But if you are going to replace the speakers you might as well rewire and hook up an amp.