I've been out of the car audio thing for quite a while now (read as LONG time), but I have never ever seen an input to a headunit with RCA patch cords. RCA connectors are the output for going to any type of preamp or amplifier component.
Come to think of it, I've been out of the car audio thing for so long, the last audio component I had purchased for a car was long before Jakg was born :eye-poppi
Come to think of it, I've been out of the car audio thing for so long, the last audio component I had purchased for a car was long before Jakg was born :eye-poppi