so i was planning to run 2 amps in my truck, 1 4 channel RF 550x (650 watts)and 1 mono RF 500bd (650 watts) amp. i was planning to install everything myself but my question is what size power guage cable should i use. i was thinking of useing a 4 guage power cable from the battery, then from the distribution block use 8 guage going into the 2 amps. what do you guys think? ot should i use 2 guage fron the battery and then from the distribution block use 4 guage going into the 2 amps?