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What Gauge Speaker Wire – How to Choose the Right Speaker Wire? 

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Last Updated on 1 year by On Trends Gear

When it comes to wiring a speaker system, there is no one-size-fits-all answer to the question of what gauge speaker wire to use. 

The gauge of the wire used will depend on the power being sent to the speaker, the length of the wire, and the impedance of the speaker. 

The right gauge of speaker wire will ensure that your speakers receive the power they need without any decrease in sound quality or risk of overheating.

Likewise choosing the wrong gauge of wire can cause sound distortion, overheating, and even potential fire hazards. 

This article will provide an overview of how to determine the correct gauge of speaker wire for your sound system.

Table of Contents

Why is Gauge Speaker Wire Important? 

Why is Gauge Speaker Wire Important

A gauge speaker wire is important because it ensures that the proper amount of power is being transferred from the amplifier to the speaker.

 The gauge of the speaker wire determines the amount of current that can safely pass through the wire without causing damage or distortion. 

A thicker gauge wire can safely handle more power than a thinner gauge wire. 

It is also important to choose the right gauge speaker wire for your system to ensure that the sound quality is not compromised. 

If the wire is too thin, the sound may become distorted or weak, and if the wire is too thick, the sound may become too loud or muddy. 

Choosing the correct gauge speaker wire is an important part of setting up any audio system.

Type of Car Audio Wire 

Car audio wires are used to connect car audio systems to speakers, amplifiers, and other components. 

Type of Car Audio Wire

We have two different types of wire that are popular in car audio wire and these include CCA (Copper Clad Aluminium) and OFC (Oxygen Free Copper) wire.

 Let’s discuss more them.

CCA Wire 

Copper Clad Aluminium (CCA) wire is a type of cable used in amplifier installation.

 It is a popular choice among car audio enthusiasts due to its affordability, ease of installation, and durability.

 CCA wire is composed of a thin layer of copper surrounding an inner core of aluminium. 

The copper acts as a protective shield which helps to prevent corrosion and improves conductivity.

 This material is a great choice for amplifier installations because it is much more economical than pure copper wire.

The biggest advantage of CCA wire is its low cost.

 It is much less expensive than pure copper but still maintains the necessary electrical properties for successful amplifier installation. 

Another advantage is that CCA wire is lightweight and flexible, making it easier to work with during installation. 

The thin layer of copper on the exterior of the wire also helps to dissipate heat, reducing the risk of overheating.

In addition to being cost-effective, CCA wire also offers improved performance compared to other alternatives.

 The copper cladding helps to reduce electrical noise and interference, resulting in better sound quality.

 This wire also stands up better to moisture and temperature variations, making it a great choice for amplifier installations in harsher climates.

OFC Wire 

Oxygen Free Copper (OFC) wire is a type of copper wire that is used in car amplifier installation because of its superior conductive properties.

 OFC wire has a better ability to carry an electrical signal with less resistance due to its low oxygen content, which is why it is an ideal choice for car audio applications. 

OFC wire is also more durable than regular copper wire, and it is resistant to corrosion and oxidation.

 This makes it a good choice for car audio installations because it will last longer and be less prone to breakdowns due to wear and tear. 

In addition, OFC wire is more flexible than regular copper wire, which makes it easier to install. 

This makes car amplifier installation with OFC wire simpler, faster, and more efficient. 

Finally, OFC wire is more aesthetically pleasing than regular copper wire.

 This is especially important for car audio installations because it will make the installation look more professional and attractive.

Similarities & Differences Between CCA vs OFC Wire

CCA vs OFC Wire Similarities: 

Both CCA and OFC wires are used in automotive audio applications. 

They both have flexible and durable outer insulation, making them suitable for use in tight spaces.

CCA vs OFC Wire Differences: 

  1. OFC wire is made from oxygen-free copper, which provides superior conductivity compared to CCA wire.
  1.  CCA wire is made from copper-clad aluminium, which is a cheaper, less conductive material. 
  1. OFC wire is generally more expensive than CCA wire.
  1.  OFC wire is also more resistant to corrosion and heat buildup, making it a better choice for high-performance audio applications. 

Similarities & Differences Between Copper vs Aluminium Wires

Copper vs Aluminium Wires Similarities:

Both copper and aluminium wires are commonly used in car amplifier installation. 

Both are used to connect the power and ground wires to the car battery, as well as connect the amplifier to the speaker system

Both are highly conductive, allowing for efficient electrical flow.

Copper vs Aluminium Wires Differences:

The main difference between copper and aluminium wires is the material composition. 

  1. Copper is a better conductor of electricity than aluminium and is more malleable. 
  1. Copper is also more expensive than aluminium, and is heavier than aluminium.
  1. Aluminium is more resistant to corrosion than copper but is also more susceptible to voltage drops due to its higher electrical resistance. 
  1. Copper also offers better heat dissipation than aluminium.

How to Choose The Right Speaker Wire Gauge

Tip #1: Determine the Length of the Wire

The longer the wire, the lower the gauge should be, as it will help to reduce resistance.

Tip #2. Consider the Impedance of the Speaker

A speaker with a higher impedance will require a higher gauge wire than one with a lower impedance.

Tip #3. Consider the Power Output of the Amplifier

A higher power output will require a higher gauge wire.

Tip #4. Consider the Frequency Response of the Speaker

A speaker with a higher frequency response will require a higher gauge wire.

Tip #5 Consider the Price

Generally, the higher the gauge, the more expensive the wire is.

Tip #6. Check the User Manual

Most user manuals will specify the recommended wire gauge for the speaker.

Choose the Right Gauge

Generally, a wire gauge of 16 to 18AWG is recommended for most speakers, but higher or lower gauges may be necessary depending on the specific requirements of the speaker.


When it comes to choosing the right gauge speaker wire for your audio system, there is no one-size-fits-all answer.

 The type of speaker wire you choose will depend on your system’s power handling capability, the distance of the speaker from the amplifier, as well as the quality of sound you desire. 

Generally speaking, the lower the gauge number, the thicker the wire, and the higher the quality of sound you will get. 

However, always consult with a professional before making your decision so you can get the most out of your audio system.

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