MmatsDude
10+ year member
CarAudio.com Veteran
You should have equal runs of both, if not more ground runs.(but thats just me) In that scenario I believe a good solid battery(If perhaps an XS PM) will make a diference too, as it will deliver more efficiently than your stock to your rear batterys.Did no one get the point of the long post? xD
I use 3 runs of 4/0 for 16' (636kcmil) power and 2 for ground (1.5' run). Big three using 4/0 as well, on 2 VFL 400.1s, with two huge batteries in back with 3 runs of 4/0 to the amps. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I rely on back batteries, front battery is factory.