In dash MP3 player

I have a Bose amplifier in my car. I've seen threads in another forum which stated that the Bose amplifier requires differential signal input with max 4V amplitude for best input interfacing to the Bose. There is an adapter device which will convert the ground reference pre-out signals coming out of an aftermarket head unit into differntial signals. This adapter device also has RCA connector jacks for direct connection to the pre-out of aftermarket head units, and wire leads for connecting to a harness.
Apparently, there is a standard volkswagen harness which will allow you to connect the wired harness in the car to the aftermarket head unit.
The main thing to keep in mind is that an aftermarket unit will not support whatever functions you have in your car that make use of the fiber optics network: CD changer, phone, steering wheel controls.
This is what I've learned so far. If any of my info is incorrect, please feel free to correct me. If you would like anymore info, I will be glad to answer what I can.







