Binary™ Cable 16-gauge 4-Conductor Speaker Wire (Purple) 500 Feet of professional quality speaker wire and a box that won't let you down. 99.9997% oxygen free conductors is used in our cable to ensure signal integrity and a lifetime of performance. Installer-friendly sequential distance markings, anti-snag dispensing slots and easy-to-strip jackets make Binary™ cable a breeze to work with.