How to Measure Speaker Size? Get the Job Done With Some Easy Steps

How to measure speaker size

When replacing speakers, you want to ensure that the new speaker is the correct size and will fit like the old one.

Most speakers come with dimensions. So you can simply rely on those dimensions to buy a new one. However, if this information is missing, it is essential to measure your existing speaker before replacing them.

So how to measure speaker size? Let’s explore!

How to measure speaker size?

A detailed guide on how to measure your speaker size?

Take apart the Casing.

Having your speakers broken can be frustrating, especially if they don’t enable you to access them from the back panel or the front grille.

Step 1: Observe the back panel to identify slots.

Step 2: Insert two screwdrivers (flat-head type) simultaneously, then apply pressure.

Step 3: You will need to take care to avoid causing damage to the speaker cabinet or grille.

Step 4: Do not touch the foam seal intact since it makes one tight enclosure to prevent vibrations.

Remember the number of wires and screws before placing them somewhere easy to remember and safe because you will need them later.

Also, don’t forget to disconnect your speakers from the power source before gathering the necessary tools to measure your speaker size.

Measure the Diameter of your  Speaker

You will need to determine your speaker’s diameter by measuring your speaker frame’s total length.

Finding its center is needed to measure the exact size of your speaker. You can do it by identifying where the horizontal, diagonal, and vertical lines intersect.

Step 1: Select one hole to start and end on the opposite one.

Step 2: Go to the hole at the diagonal end.

Step 3: If you have an oval-shaped speaker, taking some measurements for the narrow and wide sides is necessary.

Step 4: Whatever shape of speaker you have, you need to measure every aspect accurately.

Step 5: Remember those measurements, and it’s best to note them in your notebook.

While determining your speaker’s diameter, the tape should run through its center when you fix it from both ends.

Check out the Cutout Diameter

For the replacement to go smoothly, you need to ensure the cutout diameter is equal to the hole’s diameter in your casing.

Speakers come in various shapes and sizes. When looking for one to replace your old speaker, you must take measurements to ensure the new one will fit.

Inappropriate speakers can protrude, leading to damage when impact occurs.

Step 1: Put your new speaker upside down.

Step 2: Measure the speaker’s diameter at its widest point.

Step 3: Taking all measurements is essential if you aim for a speaker that isn’t round.

Step 4: Ensure the size of your speaker matches the hole where you plan to install it.

Take Some Measurements of Mounting Height

Measuring the mounting height of the speaker refers to determining the total distance between the base and the top.

Speaker is available in many designs and shapes, so identifying the highest point must be done before taking measurements.

Step 1: Set your speaker so its wide part will face up again.

Step 2: Take measurements from your speaker’s bottom up to its top.

Step 3: You must ensure your speaker is shorter than the frame. Thanks to that, you can expect it to fit perfectly.

Step 4: The speaker should leave enough space so that it cannot touch the grills and panels.

If you want the sound quality you get as good as possible, we recommend measuring the mounting depth to give you enough space to install.

The speaker would extend beyond its mounting frame in most instances. But if it protrudes so much, it can be seriously damaged when bumping into things.

Therefore, your housing should leave adequate space to cover your speaker after installing it.

Identify the Mounting Hole’s Diameter

Make sure your new speaker and the mounting hole have the same shape. To do it, all you need to do is measure the hole’s diameter between opposite ends. Ideally, this diameter and the mounting frame of your speaker are the same.


How to Measure a Subwoofer Speaker?

Remember that there are four screws located around the speaker in most speakers and subwoofers. You will need to define the distance between two opposite screws, called the external or flat diameter.

How Much Does It Cost to Replace Car Speakers?

The cost of replacing your car speakers depends entirely on your chosen system.

How to Determine the Right Speaker Size for Your Car?

You can check your car’s manual to find the speaker size.

Alternatively, you can determine the proper speaker size for your car by applying the following tips:

  • Check out your car’s manual: Your car’s owner’s manual contains much important information regarding your vehicle, including speaker size information.
  • Check from the internet: If you own a popular car model, you can easily find information about the right speaker size for your car.
  • Consult a professional: You can also get professional help from someone with expertise in car audio installation.

The Bottom Line

We’ve walked you through simple steps to measure speaker size before finding and installing a new speaker.

Choosing the wrong size speaker can cause it to get damaged quickly. It may also force you to drill new holes to install your speakers.

Also Read: How To Connect 4 Speakers To A 2 Channel Amp?

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