Kicker 850.4 - 120A
Kicker 1500.1 - 150A??
http://www.diymobileaudio.com/forum/member-reviews-product-comparisons/106549-quick-1-0-wire-comparison-pg-cadence-welding-cable.htmlNote its smaller than other 0awg, and online reviews says its CCA not copper, so I would think of it as 2awg wire instead of 0awg. Higher priced wires would generally come with the true 0awg specification.
But the wire won't be the only bottleneck, think also of your current source (alternator) if you're playing loudly for long periods, and your batteries for short periods.
Buy the best you can afford, man.