Monster Cable S14-4R CL-500 Monster Standard Four Conductor Dual Channel UL CL3 Rated Speaker Cable 14 Gauge (500 ft. spool) 14 and 16 gauge construction with ultra fine, high purity copper stranding. Tightly twisted inner conductors for increased rejection of interference. Individually color-coded red/blue inside pairs allow for easy channel identification. Economical and convenient to run two channels in one very flexible easy-to-install cable. CL3- and FT4-rated for in-wall installations