My batteries are in the back too. I have 2 amps in the front storage locker with 4 gauge wires running from the batts to each amp. I don't know if I needed it, but I installed a 1 farad cap next to each amp. It seemed to help, but to be honest, I also tuned my amps correctly at the same time, so who knows. Either way, it's not going to hurt it.
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