How to Measure a Subwoofer in 2023

When buying a subwoofer, the main concern is usually the size. Obviously, you want something that can produce big sound without taking up too much space. But there’s more to it than that.

In this post, we’ll show you how to measure a subwoofer so you can find the perfect one for your needs. We’ll also discuss, what parts of a subwoofer should you measure. So, if you’re a first-time buyer read on for all you need to know about measuring a subwoofer!

What Parts of a Subwoofer Should You Measure?

There are three main parts of a subwoofer that you’ll need to measure: Speaker diameter, Cutout diameter, Mounting height, Mounting depth:

Speaker diameter

This is the width of the speaker cone. It’s important to note that this is different from the overall width of the subwoofer, which will be larger due to the size of the surround and other components.

The speaker diameter is typically between 8 and 10 inches (20-25 cm). But it’s not just the size of the cone that matters. The shape also plays a role in how the subwoofer will sound.

For example, a round speaker will produce different sound than a square one. So if you’re looking for a specific sound, make sure to pay attention to the shape of the speaker as well as the size.

Cutout diameter

This is the size of the hole that you’ll need to cut in your car’s speaker panel in order to mount the subwoofer. It’s important to double check the cutout diameter before making your purchase. If it’s too small, you won’t be able to install the subwoofer. And if it’s too big, you’ll end up with an unsightly gap in your car’s interior.

Most subwoofers have a cutout diameter of between 8 and 10 inches (20-25 cm).

Mounting height

The mounting height of the subwoofer is the maximum distance above your floor level that you can place the subwoofer. The typical mounting height is between 12 inches to 16 inches above your floor level.

Mounting depth

To ensure that your new subwoofer lasts as long and delivers the best sound, it’s important to take these measurements before placing it in its enclosure. Make sure not only does this box match what you expected but also has an adequate mounting depth so there are no issues with stability or stuck punctures!

How To Measure A Subwoofer

How to Measure a subwoofer Quick Guide

There are two methods for measuring a subwoofer. Let’s explore each one in more detail:

Method 1 – Determine the Subwoofer’s Dimensions

Step 1 – Remove the Subwoofer Driver From the Old Enclosure

To remove the subwoofer, turn it off and then take out any screws that hold its enclosure or mounting. It’s easy!

To install a subwoofer, first, remove any covers from its back and loosen screws. After that unpack your new addition to the enclosure until you can take out all wires connected with it as well! Make sure everything is separated completely before starting installation process for the best results!

Step 2 – Determine the Subwoofer’s Mounting Depth

Place the sub upright and measure the depth of the mounting in inches. The distance between the back of the speaker and the mounting frame is known as the mounting depth.

Mounting depth should be calculated by measuring from the bottom of your subwoofer to its mounting frame. The size and weight will affect, how deep you need it mounted in order for vibrations not cause any issues with stability, so make sure this is factored into calculations when determining total amount needed!

Two measurements must be taken: The subwoofer’s top and bottom mounting depth refers to the distance from the counting frame (where the tweeter is located) to where the subwoofer itself is placed.

Step 3 –Measure the height of the mountain.

When measuring the subwoofer’s mounting frame, it is important to make sure that your measurements fall within industry standards. This will ensure proper performance and longevity of both you as well as any speakers or other audio equipment placed near them!

Once you have determined the size of your subwoofer, place it so that its widest point faces upwards. To find out how far away from yourself (or whatever surface mount is), measure with an accurate ruler or tape measure, and then consult our mounting frame guide below!

To measure the depth of your subwoofer, first From bottom to top on its mounting plate and then mark any holes that are below surface level with a pencil or pen. Next check it out from behind so you can see how far into each slot in which they fit without having anything blocking them off completely before measuring again!

The height of a sub should never exceed the maximum limit to avoid danger. If it is too tall, then you could end up damaging your boat or even worse: harming someone else!

Step 4 – Examine the cutout diameter

To ensure that the cone’s largest part faces down, flip your subwoofer upside-down. Measure from one mounting hole to another of driver’s widest parts for diameter calculation purposes and keep track so you don’t forget any details!

Measure the width of your subwoofer from its largest point on each side, even if it is not round. You should also measure how far away those four mounting holes are when measuring diagonally between them in order to find out more about what size enclosure you’ll need!

Method 2 – Determine where to drill holes for the mount.

You can find out the measurements of mounting holes for new subs before you buy them so you know which subwoofer will fit your enclosure. This is a more valuable method than the one described because you can drill new holes to support your subwoofer if needed.

This technique may also be used to measure your subwoofer accurately. Here’s how to do it:

Step 1 – Draw the diameter of the outer hole.

To find out how large of an opening you will need for your subwoofer, place the ruler or measuring tape across it and measure from one edge to another. If they are equal in size then just move on down!

No matter the shape of the hole, always check the largest point from all angles.

Step 2 – Calculate the inside diameter of the hole.

This is a crucial step if you detect recessed lips at the place where you wish to install your subwoofer.

Measuring the inner diameter of your enclosure will help you determine if it’s big enough for what you need. Place one side against an object, like a ruler or pencil; then measure across from that point to find out how long they are in inches (or mm). Make sure these measurements match up with those on file so we can get things done quickly!

The greatest point on each side of the hole should be near a recessed area. This will allow for more depth when installing your subwoofer and also make it less likely that you’ll receive any unwanted visitors from curious, importuning animals!

The cutout diameter of a recessed lip should always be slightly smaller than normal. It will not fit into the mounting hole, which can cause severe damage to your sink or bathtub bathroom fixture!

Step 3 – Determine the Subwoofer Space Depth

The depth of the space where the sub will be placed is an important consideration when making the finest buying selection.

The easiest way to find out how much your subwoofer sizes is by measuring it with a ruler. Place the end of one side against any surface, then carefully measure until you reach its length in inches or centimeters – this will give an accurate idea of what kind of size range would be suitable!

Mounting your subwoofer should not exceed the depth of an enclosure. This ensures that it fits perfectly within, so make sure you measure before mounting!

Step 4 – Calculate the Screw Pattern’s Special Features

When designing your new enclosure, measure the distance between each screw hole and find out which one is opposite. It is important to determine the distance between each screw so you can match it up with your subwoofers. Make sure not only are they all even but also have similar measurements in terms of length and height!

If you find that some of your screw holes don’t match up with those in the template, just drill new ones!

What is the Subwoofer Impedance and Why is it Important?

You should make sure that your amplifier can handle the load before purchasing a subwoofer. The information on its impedance is found either by looking at magnets or behind speakers, and it may also be calculated using multimeters to measure Ohms values between two points in space (usually wires).

It’s important not only for size purposes; more importantly though will depend upon what type of sound damping material each has which affects how much power they draw from amps during operation.

To know all about subwoofer buying factors here is our comprehensive guide and recommendations.

How to measure speaker size in inches?

The size of a car speaker is measured in inches. It is usually referred to as “in” or “in measurement.” The “in measurement” is often referred to as “inch” as well, and it’s very important to measure a car speaker properly. The measurement is taken with an open ruler from the centre of the speaker to the outer edge of the speaker.

The speaker needs to be centered, and the ruler needs to be open. A speaker may vary in size according to the model and make. A 2-inch speaker has a diameter of about 2 inches, and the diameter of a 4-inch speaker can be as large as 4 inches. It’s important to measure the speakers properly.

Speakers can be damaged if you don’t measure them correctly. A car speaker is a little different than most speakers. It can be found in the trunk of a car and is often attached to the bottom of the car. Some cars are equipped with speaker systems that are mounted in the dash. Speakers can be found in many different sizes.

How to measure a square subwoofer?

There are many ways to measure subwoofers. The most common method is the box method, which involves measuring the width and depth of the box. For a 16″ woofer, the box would be 16″ wide by 12″ deep. Another method is to simply measure the speaker’s width and height.

If you want the box to be big enough for a 16″ woofer, it must be at least 16″ wide by 12″ deep. The box for a 6.0″ woofer would be much smaller. The easiest way to measure a subwoofer is to use the box method.


Subwoofer impedance is an important measurement to consider when purchasing or building a subwoofer. By understanding the different aspects of subwoofer impedance, you can ensure that your system will sound its best.

We hope this article has helped you better understand how to measure a subwoofer and what factors to consider when making your purchase. If you have any further questions, please don’t hesitate to contact us.

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