Understanding car speaker sizes
How we determine car speaker sizes for the best fit
So what's the deal with car speaker sizes anyway?
At Crutchfield, we help customers who have questions about car speaker size all the time. Figuring out car speaker sizes can be a little confusing. In the mobile audio world, it helps to think about the size of car speakers as more of a category than an actual size. Much like a 2x4 is not actually 2" thick and 4" wide, a 6-1/2" speaker isn't actually 6-1/2" in diameter. Its measurement is close, but the actual dimensions of speakers within the 6-1/2" category can vary based on a manufacturer's design.
The differences between speaker sizes
When we research the speakers we sell, we take into account several measurements and the manufacturer's information when determining if they'll fit in various vehicles. The size designation is most closely related to their frame's diagonal measurement and hole alignment. It's not just about the diameter of the speaker's cone or the cutout diameter, which is a common misconception. Below is a diagram showing how a few speaker sizes are determined:
Not only does the size of the speaker frame help determine its size category, but note that the hole patterns on the 6-1/2" and 6-3/4" speakers are different.
Figuring out the size of your vehicle's factory speaker
Determining the size of the factory speaker in your vehicle can be tricky. These speakers don't always adhere to the same size standards as aftermarket speakers because the factory speakers are designed to work with the overall design of the vehicle. And of course, you usually have to do some work to get to the factory speakers, since it's difficult to tell the size of a speaker when it's under a door panel or a grille.
The speaker cutout in a 2015 Honda Fit isn't a conventional size. It also uses only one screw and two tabs to keep the factory speaker in place. For many vehicles, we offer brackets to help the new speakers fit the factory opening.
We've done the research for you
For most vehicles on the road, Crutchfield has done the measuring work for you. By using our exclusive OutfitMyCar tool, you'll be able to see which aftermarket speakers fit your vehicle.
Not only have we researched what speaker sizes can be accommodated, we've also taken other measurements into account. As you can see in the diagram below, we measure every aspect of a car speaker to provide you with the largest selection of speakers that'll fit your ride. And when we don't have a speaker that's the same size as the factory speaker, we usually offer brackets that work with other sizes to give you some alternatives.
We measure all dimensions of a speaker to help determine what will work for you.
And we're also here to help
If you have any questions about finding new speakers for your vehicle, contact our advisors. They can look up your vehicle, answer questions, and help you choose new speakers that'll fit the first time!
Warren from Moyock
Posted on 4/18/2022
Lot of help as always ,??
Derek Murray
Posted on 11/12/2021
I have an old box set MTX speakers that measures 6 1/2 across from hole to hole and it's a four hole system what size speaker do I need
Courtney Dunlap from Lexington
Posted on 9/28/2021
I need help. What size are these? I can show pic with tape measure.
Courtney Dunlap from Lexington
Posted on 9/28/2021
I need help. What size are these? I can show pic with tape measure.
Colby from Fort smith
Posted on 6/28/2021
What does minor apex mean?
William Thornburg from Beltsville
Posted on 5/31/2021
What size speaker we're going to a four and a half inch hole
Robert W Gruber from Auburn
Posted on 1/28/2021
I have a 2003 Subaru Outback Limited Wagon and it has the 9 speaker system I am trying to find Speakers that will fit it, I have measured the Mounting Diameter and it is sitting a right at around (5 5/16 ) inches, but I cant find any speakers that have that Mounting Diameter, 5 1/4 are to small and 6.5 inch are to big and there are no adapter kits that fit my car, Im using the original rings from the car but no speakers fit, any help would be greatly apreciated.
Alexander H. from Crutchfield
on 2/1/2021
Cedric Saintas from Beau Bassin
Posted on 4/30/2020
Can you tell me which speakers fit my 2013 Perodua Myvi SE please ? TS-A6990F / TS-A6970F / TS-A1686 / TS-A6980F or any other correct ones ?
tim from Cary
Posted on 2/27/2019
It is ludicrous that car speakers' "speaker size" dimension is based on the diagonal distance between frame mounting holes and not actual outside diameter of the basket, the bit that slips into the door opening. It be SUPER handy if Crutchfield included in its search criteria the ability to select/sort car speakers by the outside diameter of the basket. For instance, my car specs a 6.5" speaker and has an actual door opening of 6.1". That means I can install any speaker with an basket O.D. of just under 6" and thus accommodate the maximum speaker cone that'll fit. Were I to go with the default 6.5" OEM spec for my car, I might end up with a cone that is only 4" yet still qualifies as a 6.5" speaker!
Alexander H. from Crutchfield
on 2/28/2019
Alexander Hrabe from Crutchfield
Posted on 11/6/2017
Jamie, oval vs. circular isn't as much the issue as smaller woofer vs. larger woofer when you're talking bass response. A larger woofer cone can move more air than a smaller cone, and as a result, you'll gain more impact from lower frequencies. I've passed your question along to one of our Advisors, who will contact you soon to help you find the best speakers for your vehicle.