Monoprice

Monoprice 141372 12AWG CL2 Speaker Wire 50ft

Name: Monoprice 141372 12AWG CL2 Speaker Wire 50ft
Brand: Monoprice
SKU: 141372

★★★★★4.7 (1881 reviews)

High-purity oxygen-free copper speaker wire with CL2 in-wall rating for clean, reliable home audio connections.

$54.99*$68.29Save 19%

✓ In Stock on Amazon.com

View on Amazon

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

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Monoprice 141372 12AWG speaker wire is a 50-foot run of two-conductor cable built for home audio systems that demand clean, accurate signal delivery. Each conductor is made from oxygen-free bare copper with a purity exceeding 99.95%, which keeps resistance low and ensures the impedance load your amplifier sees remains as close as possible to your speakers' actual impedance curve. This matters most on longer runs and with higher-powered systems, where lower-quality copper or copper-clad aluminum conductors can introduce enough resistance to affect sound quality and amplifier performance.

What sets this wire apart from basic speaker cable is its CL2-rated PVC jacket, which meets fire safety and insurance requirements for permanent installation inside the walls of residential buildings. This makes it a practical choice for custom home theater and whole-house audio projects where cables need to be routed behind drywall. The color-coded conductors simplify polarity identification during installation, reducing the chance of wiring errors that can cause phase issues with your speakers. At 12AWG, the wire is thick enough to handle high-current applications and long distances with minimal signal loss, though the trade-off is a stiffer cable that requires a bit more effort to route through tight spaces.

Key Features

Features two conductors made of high purity (greater than 99.95 percent pure), oxygen-free bare copper.

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.

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.

12AWG.

Specifications

Conductor Material

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

Gauge

12AWG

Conductors

2-Conductor

Length

50 Feet

Jacket Rating

CL2 Rated PVC

Jacket Color

Black

Brand

Monoprice

Model

141372

Pros & Cons

👍 Pros

Oxygen-free bare copper at over 99.95% purity minimizes signal degradation over the 50-foot run.
CL2-rated jacket allows safe installation inside residential walls without additional conduit.
Color-coded conductors make it simple to maintain correct polarity during setup.
12AWG thickness handles long runs and high-power amplifiers without excessive resistance.
50-foot length is generous enough for most single-room installations.

👎 Cons

Only available in a 50-foot length, which may be too much or too little depending on your setup.
The cable is relatively stiff due to the 12AWG thickness, making tight bends and routing through small spaces more difficult.
No banana plug or spade terminations included, so you will need to strip and terminate the ends yourself.
Black jacket color may be harder to distinguish from other cables in a crowded wiring setup.

Frequently Asked Questions

Is this speaker wire rated for in-wall installation?

Yes, it carries a CL2 rating, which means it meets fire safety requirements for installation inside the walls of residential buildings.

What gauge is this wire and what length does it come in?

This is 12AWG wire in a 50-foot length, suitable for longer runs where signal loss needs to be minimized.

How do you identify the positive and negative conductors?

The two conductors are jacketed in color-coded PVC, making it easy to maintain correct polarity during installation.

What is the conductor material?

The conductors are made from greater than 99.95% pure oxygen-free bare copper, which helps maintain accurate impedance and clean signal transmission.

Can this wire be used for outdoor speaker runs?

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