Monoprice Nimbus Series Plenum Speaker Wire - 100 ft, 14 AWG 4-Conductor CMP-Rated, UL Plenum

Overview

Monoprice Plenum Speaker Wire is engineered for in-wall and in-ceiling runs, designed to fit the air-handling spaces of homes and commercial buildings. The CMP-rated jacket provides fire-safety performance that aligns with demanding building standards, while remaining flexible enough to ease routing through tight spaces.

Inside this 100‑foot spool, you’ll find four color-coded conductors made from 100 percent pure bare copper. The conductivity of oxygen-free copper, combined with a soft yet durable jacket, supports everyday handling and long, clean runs without excessive stiffness. Red, Black, White, and Green provide quick visual differentiation to help you stay organized during installation.

What makes it stand out

• CMP rating confirms compliance with fire safety and insurance requirements for in-wall use in both residences and commercial sites.
• High-purity oxygen-free bare copper conductors ensure solid conductivity and long-term durability.
• The jacket is engineered to be softer and more flexible than traditional plenum jackets, aiding installation in confined spaces.
• Distinct color-coded conductors help with accurate wiring and faster verification on site.

Versatility and practical use

Available in multiple gauges and lengths, this plenum wire is suitable for a range of installations—from upgrading a home theater to configuring a multi-room audio system in larger spaces. UL certification and compliance with plenum-related safety standards give installers confidence when planning routes through building exteriors and interior walls.

• Ideal for in-wall and in-ceiling runs in both residential and commercial environments.
• Long 100-foot length reduces the need for frequent splices or joins on standard projects.

While results can vary based on environmental factors and system design, Monoprice’s plenum wire is crafted to support reliable signal paths with controlled impedance and stable mechanical performance. Backed by Monoprice, this series aims to deliver consistent quality across installations while helping technicians maintain clear documentation and organized wiring practices.