Conductor size affects how much current a plenum speaker cable can carry and how well it supports longer runs, with lower AWG numbers indicating larger conductors; choose a size based on the speaker load, run length, and system requirements. Conductor count determines how many separate connections the cable can serve, so two conductors suit a basic circuit, while four- or six-conductor cable can support multiple speakers, signal paths, or other low-voltage connections in one run.

Use shielded plenum speaker cables when the cable will run near power wiring, motors, lighting equipment, or other sources of electromagnetic interference that could introduce noise into the audio signal. Unshielded plenum speaker cables suit many standard low-voltage audio runs, especially when the cable is routed away from likely interference sources.

Plenum speaker cables use a plenum-rated CL3P and FT6 construction designed for installation in air-handling spaces, where the cable jacket helps limit flame spread and smoke. Their stranded bare copper conductors support audio connections, while available conductor counts and shielded options accommodate different system layouts.

Choose a cable length that follows the planned route, with additional slack for terminations, service loops, and equipment movement; these plenum speaker cables are available in 500-foot and 1,000-foot lengths. Match the conductor count, wire gauge, and shielded or unshielded configuration to the speaker system’s wiring requirements, installation distance, and local code for plenum spaces.