compatability aftermarket HU, and Factory DVD
 

:confused:I have a new to me 02 T & C with the factory DVD system. I want to replace the headunit with an aftermarket one with BT, and Ipod controls. Does anyone know if you will lose your sound in the speakers if you switch out the head unit? Or if it is possible to do so? I don't know enough about these setups to know how depedent they are on each other to function properly.

simply put, I would like to change the HU out without it affecting the DVD audio out of the speakers.