Thick 14 gauge in wall speaker wire for surround sound system or outdoor speakers. For in-wall speakers, our speaker wire 14 gauge, 2 conductor will do the trick. Get greater results by upgrading to 4 conductor in-wall 14 AWG speaker cable wires. Our 14 gauge speaker wire cables are available in 50 ft, 100feet, 250foot, 300 foot and 500 feet lengths.