Monoprice 104037 12 AWG 4-Conductor CL2 Speaker Wire — main product image

Monoprice 104037 12 AWG 4-Conductor CL2 Speaker Wire

Monoprice

Monoprice 104037 12 AWG 4-Conductor CL2 Speaker Wire

Name: Monoprice 104037 12 AWG 4-Conductor CL2 Speaker Wire
Brand: Monoprice
SKU: 104037

★★★★★4.8 (52 reviews)

100-foot spool of CL2-rated, 12AWG 4-conductor speaker wire with 99.95% oxygen-free pure copper for in-wall installations.

$186.89*

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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

The Monoprice 104037 Access Series speaker wire delivers audiophile-grade copper quality at an accessible price point. Each of the four conductors is made from 99.95% oxygen-free pure bare copper, which minimizes oxidation and resistance to maintain clean, accurate signal transmission over long distances. The 12AWG thickness provides a low-resistance path that is well suited for extended cable runs common in whole-house audio and home theater installations, helping to preserve bass response and overall fidelity even at lengths approaching 100 feet.

Designed with professional and DIY installers in mind, the cable features a CL2-rated white PVC outer jacket that meets fire safety standards for installation inside residential walls, ceilings, and conduit. Inside, four individually color-coded conductors make it easy to identify positive and negative leads for each channel, whether you are running stereo pairs to a single location or bi-wiring a speaker. The 100-foot continuous spool keeps cable organized and tangle-free during installation. While the wire requires separate connectors or bare-wire termination, its combination of pure copper construction, safety-rated jacket, and 4-conductor versatility makes it a practical choice for both new installations and upgrades to existing audio systems.

Key Features

Oxygen-free 99.95% pure bare copper conductors

100 continuous feet of 12AWG 4-conductor speaker Wire | on a spool

The white outer jacket is CL2 rated, making it safe for use within the walls of residential class buildings

Each conductor has an individual, color-coded jacket enclosed within the outer white CL2 jacket

Specifications

Brand

Monoprice

Model

104037

Wire Gauge

12 AWG

Conductors

Length

100 feet (continuous spool)

Conductor Material

99.95% Oxygen-Free Pure Bare Copper

Jacket Material

White PVC

Fire Rating

CL2 (In-Wall Residential)

Conductor Identification

Color-Coded Individual Jackets

Pros & Cons

👍 Pros

99.95% oxygen-free pure copper conductors ensure high conductivity and minimal signal degradation
CL2-rated jacket is approved for safe in-wall residential installations
Four color-coded conductors in one cable simplify bi-wire or dual-speaker runs
100-foot continuous spool on a reel makes measuring and pulling cable straightforward
12AWG thickness handles long runs with minimal resistance loss

👎 Cons

12AWG 4-conductor wire is relatively thick and stiff, making tight bends and routing through conduit more difficult
Only available in a white jacket, which may not blend with all wall or room finishes if surface-mounted
100-foot spool may be more than needed for smaller installations, with no shorter length option in this SKU
No terminations or connectors are included, requiring separate banana plugs or spade connectors

Frequently Asked Questions

Is this wire rated for in-wall installation?

Yes, the white outer jacket is CL2 rated, meaning it meets fire safety standards for installation within the walls of residential buildings.

What does the 4-conductor design allow me to do?

The four individually color-coded conductors let you run a single cable to power two speakers (bi-wire a single speaker, or run stereo to one location), reducing the number of cable runs needed in your installation.

Is this wire made from pure copper or copper-clad aluminum?

This wire uses 99.95% oxygen-free pure bare copper conductors, which provides superior conductivity and signal quality compared to copper-clad aluminum alternatives.

How are the individual conductors identified inside the jacket?

Each of the four conductors has its own color-coded jacket inside the outer white CL2 jacket, making it easy to identify and connect the correct wires during installation.

What speaker run lengths is 12AWG suitable for?

12AWG wire is suitable for longer runs, generally up to about 100 feet or more depending on speaker impedance, while maintaining minimal signal loss.