Monoprice

Monoprice 141392 CL2 18AWG 2-Conductor Speaker Wire 100ft

Name: Monoprice 141392 CL2 18AWG 2-Conductor Speaker Wire 100ft
Brand: Monoprice
SKU: 141392

★★★★★2.1 (4 reviews)

CL2-rated 18AWG oxygen-free copper speaker wire in a 100ft spool, built for clean in-wall audio installations.

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Overview

The Monoprice 141392 is a 100-foot spool of 18AWG, 2-conductor speaker wire built with oxygen-free bare copper that exceeds 99.95% purity. This matters because pure copper is a significantly better conductor than the copper-clad aluminum found in many budget speaker cables, resulting in lower resistance and more faithful signal transmission from amplifier to speaker. The wire maintains a consistent impedance profile across its length, which helps your amplifier operate efficiently without working harder than necessary to drive your speakers.

Designed with in-wall installation in mind, this cable carries a CL2 fire safety rating that meets residential building codes and insurance requirements — an essential certification if you plan to route wire through walls, ceilings, or floors. Each of the two conductors is wrapped in color-coded PVC insulation for straightforward polarity identification during installation, reducing the chance of wiring errors. The 100-foot length is well-suited for typical home theater setups, surround sound installations, or distributed audio runs within a single room, though installers planning exceptionally long runs to low-impedance speakers may want to consider stepping up to a heavier gauge.

Key Features

Two conductors made of high purity (greater than 99.95% pure), oxygen-free bare copper.

Pure Bare Copper is a superior conductor to the copper clad aluminum (CCA) conductors used in most other inexpensive speaker wire.

Using Pure Bare Copper speaker wire ensures that the total load put on the amplifier remains as close as possible to the impedance curve of your speakers.

Each conductor is jacketed with color-coded PVC for easy polarity identification.

CL2 rating indicates that the cable complies with fire safety and insurance requirements, making it safe for use inside the walls of residential class buildings.

Specifications

Brand

Monoprice

Model

141392

Wire Gauge

18AWG

Conductors

2-Conductor

Length

100 ft

Conductor Material

Oxygen-Free Pure Bare Copper (>99.95% purity)

Fire Rating

CL2 (in-wall residential)

Jacket Color

Black

Pros & Cons

👍 Pros

Oxygen-free bare copper conductors (99.95%+ purity) deliver superior signal integrity over copper-clad aluminum alternatives.
CL2-rated jacket allows code-compliant installation inside residential walls.
Color-coded conductor jackets make polarity identification quick during installation.
100-foot length is generous enough for most single-room or multi-zone runs.
Pure copper construction maintains a consistent impedance load on amplifiers.

👎 Cons

18AWG is on the thinner side and may not be ideal for long runs exceeding 50 feet to low-impedance speakers.
Two-conductor design limits use to single speaker runs — not suitable for bi-wiring without doubling up.
Lacks banana plug or pre-terminated ends, requiring manual stripping and termination.
Only available in black, which may not blend with all installation environments.

Frequently Asked Questions

What does the CL2 rating mean for this speaker wire?

CL2 indicates the cable meets fire safety standards for installation inside walls of residential buildings, making it compliant with building codes and insurance requirements for in-wall use.

What is the advantage of oxygen-free copper over copper-clad aluminum?

Oxygen-free bare copper has lower resistance and better conductivity than copper-clad aluminum (CCA), which means less signal loss over long runs and a more accurate impedance load on your amplifier.

How do I identify polarity on this wire?

Each of the two conductors is jacketed in color-coded PVC, making it easy to maintain consistent polarity throughout your installation.

What speaker impedance and power levels is 18AWG suitable for?

18AWG wire is well-suited for runs up to about 50 feet with 8-ohm speakers at moderate power levels. For longer runs or lower impedance speakers, a heavier gauge may be preferable.

Can this wire be used for outdoor installations?

The CL2 rating is designed for in-wall residential use. For outdoor or direct burial applications, you would need a wire with an appropriate outdoor or UV-resistant rating.