Chrysler Repair: voyager amp, grand voyager, radio cd

Question
I have a 2001 grand voyager (second hand) when i got the car it had no radio in it. it looks like someone has previously fitted an adaptor to take a different radio/cd. i've put a cd player onto the wiring, it powers up but has no sound. the speakers in the car have infinity on them and i am assuming there must be an amp somewhere. Where is it? Ive been trying to get this system working now for 3 years!! No joy! Can you help?

Answer
each speaker has its own amp built onto each speaker.  U are more then likely need to have the power system for the speakers working  plus I dont know how they wired in the radio  so  U might need to take it to some one so they can look up the wire diagram and get it working for ya