Monoprice Speaker Wire 16 AWG CMP Plenum Rated - In-Wall Ready

Our review finds the Monoprice Speaker Wire 16 AWG CMP plenum rated cable best suited for installers, AV contractors, and homeowners who need a safe, code-compliant solution for in-wall and plenum runs. The single biggest reason to buy is its combination of a verified plenum (CMP) jacket and high purity bare copper conductors, which together deliver building code compliance and solid electrical performance for long cable runs. In this review the cable proves to be a practical, no-frills choice when fire safety, conductor quality, and clear polarity identification matter.

Key Features

• Plenum (CMP) rating: The fire-retardant jacket meets rigorous standards, making the cable suitable for air-handling spaces and compliant with many building and insurance requirements.
• 100 percent bare copper: High purity oxygen-free conductors provide reliable conductivity for clearer audio signal transfer over distance.
• Flexible jacket material: The softer, more flexible plenum jacket simplifies routing through tight spaces and around corners compared with stiffer plenum cables.
• Color coded conductors: Easily identifiable red and black conductors reduce installation errors and speed up wiring tasks.
• Long length option: The 500 ft spool reduces joins for large installations and provides enough length for multi-room projects.

Who It's For

This cable is aimed at AV installers, contractors, and homeowners performing in-wall or plenum installations who must follow fire code and want a dependable conductor. It is especially useful for commercial builds, theaters, multi-room audio systems, and new construction where plenum-rated cable is required.

Those who only need short, visible runs or who seek ultra-flexible, speaker-specific cable for frequent reconfiguration may want a softer instrument-grade wire instead. Also, if someone requires insulated or oxygen-free tinned conductors rather than bare copper, a different specialty cable may be more appropriate.

Pros & Cons

Pros

• Meets plenum (CMP) safety standards, making it suitable for in-wall and air-handling spaces.
• High purity bare copper conductors deliver strong conductivity and consistent audio performance.
• Softer plenum jacket improves flexibility versus older, stiffer plenum cables.
• Red and black color coded conductors make polarity and installation quick and reliable.

Cons

• Some users report mixed stiffness impressions; while the jacket is softer than older plenum types, it is not as supple as non-plenum speaker wire.
• As bare copper conductors, the wire requires careful termination to avoid oxidation if left exposed long-term.

Specifications

Our Verdict

The Monoprice 16 AWG plenum speaker wire is a practical, cost-effective choice for anyone installing in-wall or plenum audio wiring who needs code-compliant cable and reliable copper conductors. It balances fire-safety certification, conductor quality, and easier handling, making it a solid value for commercial and residential installations where long runs and safety matter.

Frequently Asked Questions

Is this cable safe for in-wall and plenum use?
Yes, the cable is CMP plenum rated and Underwriters Laboratories approved for use in air-handling spaces and in-wall installations.

What material are the conductors made from?
The conductors are 100 percent pure bare oxygen-free copper for good conductivity and audio performance.

Will the jacket be easy to route through tight spaces?
The plenum jacket is designed to be softer and more flexible than many traditional plenum jackets, which helps when routing through conduits and around corners.