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Black 18 AWG two-conductor plenum speaker wire on spool

Monoprice Inc.

Monoprice 113731 Speaker Wire 18AWG 2-Conductor CMP 250ft Black

SKU CH-TZ0A-X7T77

CMP-rated 18 AWG two-conductor speaker wire with oxygen-free copper conductors for in-wall residential and commercial installations

  • TypeOthers
  • Length76.2
  • Connector Number2
  • Terminal GenderMale to Male
  • FeaturesBuy with Confidence: With Monoprice's Lifetime Warranty on a
  • CMP plenum rating meets fire-safety codes for in-wall installs
  • 18 AWG oxygen-free copper conductors preserve signal clarity
  • 250 ft reel covers long whole-home runs
  • Flexible jacket eases pulls through tight cavities
  • Lifetime warranty backs the cable for its service life

CMP-rated 18 AWG speaker wire

Monoprice 113731 is a 250-foot spool of 18 AWG two-conductor speaker wire with a CMP plenum rating. It uses 100 percent oxygen-free bare copper conductors for accurate signal transfer. The black jacket is softer and more flexible than typical plenum-rated cables. This wire is intended for installers running speaker cable through air-handling spaces in homes or commercial buildings.

Replaces non-plenum or higher-gauge cable

When local fire codes require plenum-rated cable inside walls or ceilings, this CMP jacket satisfies the requirement where standard CL2 or CL3 wire cannot be used. The 18 AWG conductors are suitable for typical home-theatre or distributed-audio runs; longer distances or higher-power systems may need thicker gauge wire. The jump is worth it whenever insurance or building inspection demands a plenum rating.

Pulls easily but needs proper termination

The softer jacket reduces kinking during long pulls through studs or conduit, and the color-coded inner jackets simplify polarity identification. Common issues include nicking the thin insulation while stripping, leaving stray strands that short at the terminal, and forgetting to verify the CMP marking against the project specification sheet. Use a quality stripper and twist strands tightly before connecting.

Highlights

  • CMP plenum rating meets fire-safety codes for in-wall installs
  • 18 AWG oxygen-free copper conductors preserve signal clarity
  • 250 ft reel covers long whole-home runs
  • Flexible jacket eases pulls through tight cavities
  • Lifetime warranty backs the cable for its service life

Specifications

BrandMonoprice
Model113731
TypeOthers
Length76.2
Connector Number2
Terminal GenderMale to Male
FeaturesBuy with Confidence: With Monoprice's Lifetime Warranty on all Cables, you can rest assured we stand behind our products and our customers.

Questions about this item

What size conduit or opening does the 18AWG 250ft reel need to pull through?

The 76.2 metre length ships on a spool that feeds from the centre, so allow enough clearance for the reel diameter and the plenum-rated jacket to pass without kinking.

Which step do installers most often miss when terminating the oxygen-free copper conductors?

Stripping back the colour-coded inner jackets far enough to expose clean bare copper before securing each conductor prevents high-resistance joints.

When would the CMP-rated jacket need to be replaced in an in-wall run?

The jacket is rated for permanent plenum use; replace only if physical damage or a building renovation exposes the cable to new fire-code requirements.

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