Monoprice 113731 18AWG 2 Conductor CMP Plenum Speaker Wire

The Monoprice 113731 Nimbus Series plenum speaker wire is engineered for permanent in-wall and in-ceiling audio installations where fire code compliance is mandatory. Its CMP plenum rating certifies that the jacket material produces minimal smoke and flame when exposed to heat, meeting the strict UL safety standards required for installation in air-handling spaces found in both residential and commercial buildings. Inside the jacket, two 18AWG conductors made from 100 percent pure bare copper ensure clean signal transmission with low resistance, delivering consistent audio quality across the length of each run.

What sets this cable apart from many plenum-rated alternatives is its jacket flexibility. Traditional CMP cables are often rigid and difficult to work with in tight spaces, but Monoprice has formulated a softer compound that bends more easily around corners, through conduit, and along joists without kinking. The red and black color coding on the conductors eliminates polarity guesswork during termination. Sold in a 250-foot spool, this wire provides enough length for multi-room installations or several shorter runs, making it a practical and cost-effective option for audio installers and home theater integrators alike.