1/0 for main wire, into a fused distribution block, then into NOTHING less than 4 ga going to each amp for powa, then the amp needs the same size cable to go to a ground. the 12 gauge is for sending the power to the speakers.
prolly too late now, but don't put the bbq sauce on until the last few minutes of grilling. cuz the sugars in the sauce will caramelize and start to burn.
It may be on here somewhere else, so just post a link and I'll check it out. But if not, what are the main diff's in the separate lines of Sundown amps??