Here's the hypothetical situation I have with another vehicle at home. I can easily install one pair of speakers in the kick panels, another pair in the front doors, and one more pair of speakers on the rear deck, plus a subwoofer.
I'm curious as how this setup would be wired. If the HU only has 6 pre outs but 7 channels as described above, how/were would you plugin or splice into the RCA cables to get the signal from the HU to the speakers? In this scenario assume multiple amps.
Please excuse my simpleton mind, my only install has been with a 4 channel amp to 4 channels, pretty easy.