Thick speaker cable wires for your home speaker system. Get 12 AWG direct burial speaker wire for outdoor installations. Make your audio sound crisp longer with 12 gauge speaker wire. The 12 gauge speaker wires can be found in the following lengths: 50 ft, 100 feet, 250foot, 300 foot and 500 feet. A better, thicker alternative to 14, 16 and 18 AWG speaker wires.