How To Build A Subwoofer Box To Specifications? (That Really Works)

There are so many benefits attached to doing things yourself. It’s this same love for DIYs that’s brought us here to the point where we can freely show you how to build a subwoofer box to specifications by yourself. While DIYs might not be for everyone, it wouldn’t hurt to try.

Besides, building a subwoofer box yourself would save you a lot of money, and you'll also whip it up to your taste. Ready to create a cool subwoofer box for your Subwoofer? Then let's get kicking into it.

Designing a Subwoofer Box

When it comes to building subwoofer boxes, there are a few factors you should consider. Of course, you'll need to consider the size of the Subwoofer before you start to cut the wood into the shape of the Subwoofer.

But that’s on the general front. Specifically, you'll need to determine your box's internal and external dimensions to carve out the perfect box for your Subwoofer.

While the process of determining the external dimensions of the box only requires essential measurement, getting the interior dimensions requires you to channel your inner math genius.

In plain words, you’ll need to do a bit of math. Hold on, don’t freak out! The math required here is quite basic, and we'll show you how to do it. So, keep reading.

Related: DIY speaker kits

What’s the minimum depth of the box?

Before you start to cut into your box, you need to determine your box's minimum depth. That is the first step to determine the external dimension of the box.

When we talk about the depth of the box, you can get it by measuring the front-to-back of your Subwoofer. But that's not all. You have to add two additional inches to the depth measurement you've obtained from measuring the Subwoofer.

Adding the extra inches is a great way to avoid ugly surprises, as you would have to mount the Subwoofer into the box from the front. The extra inches would come in handy during fitting.

Related: How to test subwoofer

What’s the minimum height and width? 

The next thing to do after you’ve figured out what the depth of the Subwoofer is, proceed to determine the most diminutive height and width of the box.

The easy way to do this is to refer to the user manual of your Subwoofer. Depending on the Subwoofer's brand, the manufacturer would write the height and width on the manual.

However, not every subwoofer manufacturer sees the need to include this detail in the manual. Hence, if the manufacturer doesn't highlight the height and width of the Subwoofer on the manual, you'll need to measure the woofer to determine the least width and height.

The simple way to do this is to measure the Subwoofer's frame diameter. Of course, when noting the frame diameter, add a couple of inches to create space for when you mount the woofer in the box.

Your Vehicle’s Space: 

Your car might not come with sufficient space for your Subwoofer, and that's fine. It shouldn't stop you from installing the Subwoofer in your car.

So, you should create space in your car for the Subwoofer to fit in. Since you now have an idea of the external dimensions of the box, you can determine just how much space the Subwoofer would need to occupy in your car.

Proceed to measure the depth, width, and height of the space you're willing to set aside for your woofer. If you have to turn the box into a wedge-shaped box, you'll also need to consider how deep the top and bottom of the box must be to fit into the car space you created for it.

Once you've determined all the necessary dimensions for the car space, proceed to make any adjustments you need to make on the car.

Related: How Does A Subwoofer Work

Determine the internal dimension. 

Now, you have to activate your inner math genius to determine the box's internal dimension and volume successfully.

But first, we start with the internal dimension. To begin, let's devise random numbers for our external dimension. The reason? The figures from the outer dimension are an integral part of determining your internal dimension.

Regular boxes (precisely rectangular boxes)

• Depth: 13”
• Width: 15”
• Height: 14"