Custom Cable Connection 16 Guage AWG CL3 Rated 4 Conductor Shielded Plenum Speaker Wire Cable, 100 FT Fire Safety In Wall Rated, Jacketed in White Plenum PVC, 99.9% Oxygen-Free Pure Bare copper :
GearIT 16/2 Speaker Wire (200 Feet) 16 Gauge (Copper Clad Aluminum) - Outdoor Direct Burial in Ground/in Wall / CL3 CL2 Rated / 2 Conductors .. on OnBuy
12 AWG CL3 OFC Outdoor Speaker Wire, GearIT Pro Series 12 Gauge (250 Feet / 76.2 Meters/
Liberty (16-4C-DB) DIRECT BURIAL CL3 4-Core Speaker Cable 1000ft / 305m
500FT Black 12g 2-conductor cL3 Speaker Wire | OSD Audio