Hey right now in my car i have 1 2 channel 500 watt pyramid amp that powers 2 kicker comp sub woofers. i have an after market head unit and want to change out the front and rear door speakers. I hooked up the amp to the batteries and radio but i don't understand how i would hook up a 2nd amp to the batterie and radio. Also i don't understand how to get the speaker wires from the doors to the amp. Please please help.
if you are connecting 2 amps, you can either wiring power independently to each amp or use a distribution block, it all depends on the amps and the gauge of the cables, as for the signal, the head unit could have independent (RCA) outputs for a sub and for speakers, if not there are other options, best you can do is list the models of all your equipment here to see what needs to be done.