Monoprice 116177 12 AWG CMP-Rated Plenum Speaker Wire

The Monoprice 116177 is a 12 AWG, 2-conductor speaker wire engineered for professional and commercial audio installations where fire safety compliance is non-negotiable. Its CMP plenum rating, certified by Underwriters Laboratories, means the cable jacket has been specially treated to resist flame spread and limit smoke production, allowing it to be legally run through the plenum ducts and air-return spaces found in commercial buildings. This makes it a go-to choice for offices, retail spaces, restaurants, and institutional buildings that require code-compliant distributed audio.

Inside the fire-resistant jacket, the wire uses 100% pure bare oxygen-free copper conductors. This higher-purity copper reduces oxidation and maintains consistent electrical conductivity over time, which translates into faithful audio reproduction without the signal degradation that can occur with copper-clad aluminum or lower-grade copper alternatives. The 12-gauge thickness provides low resistance across long cable runs, making it suitable for high-wattage amplifiers driving speakers at significant distances. Sold in a 1000-foot spool, this wire is sized for professional installers tackling multi-room or multi-zone audio projects in a single purchase.