Monoprice

Monoprice 113707 Plenum Speaker Wire 12 AWG, 50ft

4.7 (965 reviews)

Plenum-rated 12 AWG pure copper speaker wire built for safe, high-fidelity audio runs through walls and ceilings.

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*Price sourced from Amazon.com. Last updated:Jun 28, 2026.Price and availability are subject to change.

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Overview

The Monoprice 113707 Nimbus Series Plenum Speaker Wire is a 50-foot, 12 AWG two-conductor cable designed for permanent audio installations in environments that require strict fire safety compliance. Its CMP plenum rating certifies it for use in air-handling spaces such as drop ceilings, raised floors, and in-wall pathways where building codes mandate low-smoke, fire-retardant cabling. This makes it suitable for commercial spaces including offices, retail stores, houses of worship, and schools, as well as residential installations where code compliance or an extra margin of safety is desired.

The cable's conductors are made from 100% pure bare copper, which provides lower electrical resistance and superior signal fidelity compared to copper-clad aluminum alternatives commonly found in budget speaker wire. At 12 AWG, the conductors are thick enough to carry audio signals over moderate distances with minimal loss, making this wire a solid choice for distributed speaker systems and whole-home audio setups. The red and black color-coded conductors simplify polarity identification during installation, and the jacket material is notably softer and more flexible than traditional plenum-rated cables, easing routing through tight spaces and around corners.

Key Features

The Plenum (CMP) rating indicates that the cable complies with fire safety and insurance requirements, making it safe for use inside the walls of residential and enterprise class buildings.

This speaker Wire | features conductors made of high purity oxygen-free bare copper.

Monoprice Plenum Speaker Wire | uses a high quality material that is soft -er and more flexible than on traditional plenum rated jackets.

Easily identifiable Red and Black conductors.

Specifications

Brand
Monoprice
Model
113707
Series
Nimbus
Length
50 Feet
Gauge
12 AWG
Conductors
2
Conductor Material
100% Pure Bare Copper
Jacket
Fire-Retardant Plastic
Rating
CMP (Plenum)
UL Approved
Yes
Conductor Colors
Red and Black

Pros & Cons

👍 Pros

  • CMP plenum rating meets fire safety codes for installation in air-handling spaces, drop ceilings, and walls.
  • 100% pure bare copper conductors provide superior signal transfer and lower resistance compared to copper-clad alternatives.
  • Red and black color-coded conductors simplify correct polarity identification during installation.
  • Flexible jacket is softer than traditional plenum-rated cables, making it easier to route through tight spaces.

👎 Cons

  • 50-foot length may be insufficient for larger commercial installations, potentially requiring multiple runs or a longer spool.
  • 12 AWG is relatively thick, which can make routing through tight conduits more challenging.
  • Only available as a two-conductor cable, so it cannot carry multiple speaker channels in a single run.

Frequently Asked Questions

A CMP plenum rating means this cable meets strict fire safety standards for installation in air-handling spaces such as drop ceilings and raised floors. It produces less smoke and toxic fumes if exposed to fire, which is required by building codes for these areas.
Yes. While plenum-rated cable is required in commercial air-handling spaces, it exceeds the safety requirements for residential in-wall installations and is safe to use in homes as well.
Pure bare copper offers lower electrical resistance and better signal conductivity than copper-clad aluminum, resulting in less signal loss and cleaner audio quality, especially over longer runs.
The two conductors are color-coded red and black for easy identification during installation, reducing the risk of wiring errors.