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Speaker wire guide

How to choose the right gauge, length, and type

In this article: We’ll explain the importance of good speaker wire and tell you what you need to know, including…

...and we'll offer some tips on how to connect speaker wire to your speakers and amplifier.

S

peaker wire is the lifeblood of your audio system. To put it in other terms, think of speaker wire as the arteries of your system, with your receiver being the heart and your speakers being the extremities. There are lots of different gauges, lengths, and connector types, and that can make choosing the right kind for your needs difficult. But it's not that bad once you learn the basics.

What gauge wire is needed for home speakers?

This is one of the most common questions I got from customers when I was a Crutchfield Sales Advisor. Getting the correct speaker wire gauge is one of the most overlooked but important things to get right.

When looking at speaker wire options, you'll notice they all have an "AWG" number. AWG refers to the American Wire Gauge standard. The way the numbers work is straightforward — the lower the number, the thicker the wire.

So, a 12-gauge wire is thicker than a 14-gauge wire, and so on. Thicker wire has less resistance to current flow, so it's best to use it with longer runs, high-power situations, and for lower-impedance speakers (think 6-ohm or 4-ohm).

For shorter runs (50 feet or less) that go to standard 8-ohm speakers, 16-gauge wire is all that's needed.

Difference in wire diameter from 18 gauge through 12 gauge wire

A scale diagram of wire gauge thickness. Smaller numbers correspond to thicker wire. (Not drawn to actual size.)

What gauge speaker wire do I need for home theater?

It all depends on your speakers and how far away they are from your receiver. For most home theater systems, 16-gauge wire is all you'll need. However, if your speakers are more than 50 feet away from the receiver, stepping up to 14-gauge isn't a bad idea. Also, if you're using a high-current amplifier or lower-impedance speakers, 14-gauge is best.

How much wire do you need?

Crutchfield offers speaker wire in 50- or 100-foot rolls that can be trimmed according to your needs.

Guesstimates are okay, but always over-estimate to be safe. If you want to know exactly how much wire you'll need, there's a simple way to figure it out. Run a string from your receiver or amplifier to each of the speaker locations, measuring the string once you're done. Then add a few extra feet to the total to give you some slack for easier connection to your gear.

Check out the video below for a few more helpful tips.

What type of wire do you need?

We offer speaker wire with connectors or without.

If you go the connector-less route, I recommend grabbing some banana plugs. Getting bare wire into speaker terminals can be a chore, and banana plugs help simplify the process and make connections a breeze once they're installed.

Get the right speaker wire to run inside your walls

It's important to pick up some UL-rated speaker wire labeled CL2 or CL3 if you need to run wire inside your walls. The in-wall cables we carry are available in 2-conductor or 4-conductor flavors.

You'll need CL rated wire for in-wall use.

CL-rated wire is required for in-wall speaker wire runs. The speaker wire gets ran through and between the studs in your wall.

4-conductor cables are versatile and great to have on hand. They're perfect for running a single cable between your amplifier or receiver to an in-wall volume control in another room. From there, you can run 2-conductor cables out from the volume control to both speakers in that location.

4-conductor wire is also good for connecting stereo-input speakers to amplifiers. Take a look at our comprehensive in-wall wiring guide for more information.

Use 4-conductor cable for wiring volume controls, or for stereo input speakers.

You can run 4-conductor speaker wire to an in-wall volume control (left) or a stereo-input speaker (right).

Need to run wire outside?

If you want to install your outdoor speaker wire underground, you'll need wire rated for direct burial.

Ask a Crutchfield A/V designer to recommend the right kind wire for your installation.

Are audiophile speaker cables worth it?

Audiophile speaker wire can definitely make a difference in your sound. Audiophile speaker cables often use higher quality materials inside the cable. It's also not uncommon to find high-conductivity materials like silver in their connectors. But what kind of sonic difference does all that make? Folks tend to notice that their music is more dynamic overall than it was with more budget-friendly cables.

Photo of AudioQuest Rocket 33 Bi-wire speaker cables with pre-attached banana plugs

Audioquest's Rocket 33 cables are exceptional, audiophile-grade speaker wires with banana plugs already attached

As a personal anecdote, I was using some run-of-the-mill wire to connect my Klipsch Reference Premiere home theater system to my Yamaha Aventage receiver and felt like the speakers weren't quite performing at their peak. After taking the plunge and purchasing the Rocket Series high-performance speaker cables from Audioquest, I was floored.

Movies and music sounded much more alive, with more depth in their soundstages. The whole soundscape sounded more vibrant than ever. Your mileage may vary depending on what speakers you're using and what receiver you've got pushing them, but I was forever sold on audiophile cables after my experience.

If you're looking for some speaker wire with connectors, check out our offerings from Audioquest, McIntosh, and Tributaries and read the reviews. If you're looking for bare wire without connectors, we have some solid options from Audioquest and Austere.

How to connect speaker wire

The first step is to determine which ends of your speaker wire are positive and negative. For speaker wire with connectors, the positive is often red and the negative is black. Once that's done, connect one positive end to the positive terminal on your speaker and the other positive end to your amp or receiver. Do the same for the negative (black) end, and repeat for however many speakers you're hooking up.

If you decide to hook up your wire without connectors, use a wire stripper to take about 3/8-inch of insulation off the ends of each lead, exposing the bare wire strands. Twist each lead's bare wire strands tightly, so no stray strands are sticking out. Loose strands could make contact with the cable's other lead and cause a short circuit, potentially damaging your components.

Types of speaker wire connectors

From left to right: bare wire, pin connectors, spade connectors, single banana connectors, dual banana connector.

Speakers have one of two different types of speaker wire terminals — spring clips and binding posts (see illustrations below).

Spring clips are very easy to work with. Simply press down on the clip, insert the speaker wire, and release. The spring-loaded mechanism holds the wire in place. Spring clip terminals can accept bare wire and pin connectors, but not spade connectors, banana plugs, or dual banana plugs.

Spring clip connectors

Spring clip terminals accept bare wire or pin connectors.

Binding posts provide a very solid connection for your speaker wire. All you have to do is unscrew the collar to reveal the hole and feed the bare speaker wire or pin connector in, then screw the collar back down.

You can also use banana and dual banana plugs to connect the speaker wire directly into the hole in the center of a binding post. A tip from me: If your banana plugs and speakers are brand new, it's going to take a little pressure to get the banana plugs inserted. Nothing is wrong with your speakers or the cable, the connectors are just tight. Applying some force is often necessary the first time you're connecting banana plugs to your speakers and receiver.

A spade connector slides around the binding post's collar and is secured once you screw the collar back down.

Binding post connectors

There are all sorts of ways to connect speaker wire to your speakers and receiver. From left to right: bare wire, spade connectors, single banana plugs, and double banana plugs.

We carry quite a few connectors that you can attach to bare speaker wire. Our own Crutchfield-branded banana plugs are an excellent value and make connecting your speakers a breeze.

We also have some cool right angle banana plugs from Ethereal that are grea for saving space. Speaker Snap makes some nifty quick-connect banana plugs that are easy to install. And if you're looking for a more high-end option, Audioquest has you covered with their silver-plated banana plugs.

Need further help?

If you're still stuck on which speaker wire to get, feel free to reach out to one of our Advisors for personalized one-on-one advice. Also, all Crutchfield purchases come with a generous 60-day return period and free lifetime technical support.

  • Bill

    Posted on 12/24/2023

    Don't bother with the audiophile snake oil. Spend the money you save on better equipment not accessories. Heck the markup on these "audiophile" things make guys like this author extra money from selling nothing more than a shiny rock to suckers.

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    Charlie Pastorfield from Crutchfield

    on 1/17/2024

    Bill -- The great thing about home audio is that 4 people can listen to the same speaker and come up with 4 different opinions - too bright, too dull, a little boomy in the bass, could use a little more bottom. If you've listened to high-quality cables and connectors and they don't do it for you, more power to you! But I hear a very noticeable difference and I will continue to upgrade those cables and connectors whenever a good deal comes along. Charlie
  • Speaker Myth

    Posted on 12/20/2023

    Stil not buying the cable comment. You can make cables that are no different than Audioquest. This has been proven time and time again. Get quality 12awg speaker wire there are plenty of suppliers. Shielding, interference, poor termination, etc. will cause signal noise and issues. Beyond that it is just Marketing, talk to some high-end audio retailers (had a family member in the business, know the owners and it is just throwing money away). I have heard speakers that cost 30k a piece and no difference when you switch out the cables (had the owners do it in front of my eyes, in an actual audiophile listening room in their store)

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    Charlie Pastorfield from Crutchfield

    on 1/16/2024

    If you're happy with the 12-gauge wire you use, then that's great. But we get to try a lot of products here at Crutchfield, and we hear product demonstrations all the time. Any doubts that I have about the validity of high-grade speaker wire, power wire, and connectors have long been put to rest. Everything I buy is to increase the focus and tonal quality of my audio system and the cables and connectors I've bought have had as big a part of improving my sound as anything I've purchased. Just my opinion and thanks for listening!
  • Patrick from Siler City

    Posted on 12/9/2023

    In my pro PA system, I'm pushing 2000 watts down every cable. Since the system is moved on a regular basis, I needed durability and flexibility along with the power handling capacity. So I soldered Speakon ends onto #10 SO cable. Works like a champ.

  • Mitchell Buckley from solon

    Posted on 12/7/2023

    i bought12 ga speaker wire from home depot, and the wire turned green, will this have any perfromance effect on my sound?

    Commenter image

    Archer A. from Crutchfield

    on 2/1/2024

    Thank you for your comment, Mitchell! That's a solid question. Sounds like your speaker wire has some oxidation. While that copper oxidation might have given the Statue of Liberty its iconic color, it's likely harming your sound quality. Oxidation compromises the integrity of the copper itself, which can lead to some sound-muddying results. I'd recommend grabbing some oxygen-free copper wire. It's able to resist corrosion/oxidation because it contains virtually no oxygen. No oxygen, no oxidation, happy speakers, happy ears. I hope this helps!
  • Jim from Davis

    Posted on 12/4/2023

    I don't believe your claims about audio cables

    Commenter image

    Charlie Pastorfield from Crutchfield

    on 12/6/2023

    I was right there with you in thinking that a wire is a wire. But then a friend gave me some high-end speaker cables to try out. I ended up buying them because they were so superior to the generic cables I using. It defies logic that one wire of a given gauge could be better than another, but I can tell you that it is absolutely true. What does make sense is that your system is only as good as its weakest link, and I've found that replacing all my generic connectors (speaker cables, XLR and RCA cables, and even power cords) with high-quality parts has really improved the sound of my system dramatically. Just one man's opinion, but I thought I'd share it with you.
  • Robert

    Posted on 12/4/2023

    Question: How much does Crutchfield stand to profit from those "audiophile" cables compared to decent quality, plain OFC cable of the right gauge for the task at hand?

    Commenter image

    Charlie Pastorfield from Crutchfield

    on 12/6/2023

    Robert, it really has nothing to do with profit. I've worked for this company for 25 years and we just don't recommend something that's more expensive when a less expensive item will do the trick. I was a complete skeptic about audiophile cables until I started assembling my own home audio system. And I have discovered over the last decade that these cables actually do what they claim - make your system sound better. If you have nice audio components that are a step above ordinary, it only makes sense to use cables of the same quality. Thanks for listening.
  • Bill from Clayton

    Posted on 12/2/2023

    my amplifier is 7 feet from each bose 901 speakers. Will my sound b better if I have 8 feet of speaker wire vs 25 feet bundled up, thanks?

    Commenter image

    Charlie Pastorfield from Crutchfield

    on 12/12/2023

    Bill - I would go with the shorter wire, but maybe a little longer than 8 feet in case you move things around later.
  • Curtis from Kerrville

    Posted on 11/25/2023

    I am building a new system that has to have components in bookshelves. It's a 4' run to one speaker and 16' (in and out of a wall) to the other. M-L B10s y'all just delivered driven by 110w. Biggest debate in audio - do I buy one of your 14-g 6' wires and one 20', or buy a longer wire for the one side and coil? The catch is the only hidden place to coil is on top of the amp.

    Commenter image

    Charlie Pastorfield from Crutchfield

    on 12/12/2023

    Curtis - You're right, it is ther biggest debate in audio. I've tried it both ways with the same system - two speaker cables of equal length vs. one short and one long. I really can't hear a difference, and when I listen to a mono record with the one short and one long, the sound is dead center. So, in my opinion, go with one short wire and one long.
  • Joseph Karwisch

    Posted on 11/15/2023

    Our new house was prewired for ceiling speakers with all wires ending at a wall plate. The wires are too short to connect to my receiver, so I've had to use standard electrical butt splice connectors with 5ft of speaker wire to extend the wires. Question I have is there a better solution to join the wires together to prevent audio loss?

  • Anthony

    Posted on 11/1/2023

    It's there a way to safely wire one speaker in mono using the speaker wire, either at the speaker or the amp? Reason I'm asking is I have one extra in-wall speaker I'd like to install in my garage in mono as I don't have a stereo pair. Just for non critical listening. And no I don't have a mono amp or something with a mono switch. Thanks!

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