Just started to upgrade the sound system in my S3. Ive changed the wiring using AndyMac's pinout drawing whichs gives me a rear left and right preout. Trouble is the amp i've got needs an input for each chanel. I can have the rear speakers working but not the sub and vice versa depending on which channel the RCA goes into.
Can I split the preout signal coming from the headunit?
Any other ideas?