1/0 AWG power and ground wire at Sound Solutions Audio: OFC and CCA in black, red and colors, by the foot or the spool, from Sky High Car Audio, Rhyno Audio Works, XS Power, Orion and American Bass. Authorized dealer for every brand we carry, with real-world advice from enthusiasts who have been building systems since 2006. Fast US shipping, financing available, and support after the sale.