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How to Build Your Own Subwoofer

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Kit happily writes articles on almost any topic you could hope for. When he's not knee-deep in programming, he enjoys chilling with his cat

This DIY subwoofer matches the size of the book shelf.

This DIY subwoofer matches the size of the book shelf.

The Benefits of Building Your Own Subwoofer

Building your own subwoofer is a great way to save money and get exactly what you want. There are many benefits of building your own subwoofer, but you should know the basics before you begin.

When it comes to designing your home or car audio system, there are many factors to consider. One important factor is the location of the speakers in relation to the listening position because this will affect how sound waves bounce off walls and furniture in the room. The type of materials used for construction also affects how sound waves behave in a room, so it’s important to take that into consideration as well.

Building a Subwoofer

To learn how to build your own subwoofer, start by determining the volume of your enclosure. Your enclosure should be a box or cylinder of some size. You can use any material for the box, such as MDF or cardboard, as long as it has an internal volume.

Once you have a volume for your box, you can begin to add stuffing. A proper amount of stuffing will increase the effective volume of your subwoofer by about 25%. Stuffing can also help compensate for internal volume losses caused by driver displacement.

Once you have determined the size of your enclosure, the next step is to select your subwoofer driver. You can find subwoofer drivers from various online retailers and smaller shops like Stereo Integrity. Be sure to select a high-quality driver with a large cone area and linear excursion. If you can't afford these, you can opt for a Bluetooth speaker. You can also purchase a subwoofer driver from a specialist shop.

If you want to make a subwoofer that can reproduce the sounds of a large-scale sound system, then choose a subwoofer driver with the right sensitivity. Choose the correct driver for your box by following the guidelines on the WinISD website. Be sure to choose a subwoofer driver that matches the size and shape of your enclosure. It will affect the performance of your subwoofer, so choose carefully.

Selecting a Driver

One of the most important aspects of building your own subwoofer is the choice of driver. Here are the main factors to consider before selecting yours:

  1. Drivers with a massive cone and long voice coil will need high-power handling and low sensitivity, which are crucial to get the deepest, cleanest bass. When coupled with the proper amplifier, these drivers can deliver powerful, impactful bass.
  2. Consider the type of enclosure. Different enclosure designs demand different drivers. For example, a sealed-box design typically expects a driver to have high Qts, low Fs, and good Xmax. On the other hand, a vented box design typically demands a lower Qt and higher Fs. In general, it's better to stick with a sealed box design for the best sound quality.
  3. Consider the voice-coil inductance of the driver. Most people mistakenly believe that driver inductance directly affects sound quality. In reality, it's a more complex equation. A driver with low inductance will produce a lower sound, while a driver with a high inductance will produce a higher sound. In addition, the higher the inductance, the higher the bass will be.
The carpentry required for a professional design

The carpentry required for a professional design

Constructing Your Cabinet

If you have ever wondered how to build a subwoofer cabinet, then you're not alone. Many DIY enthusiasts have the same question: "How do I make a cabinet for a subwoofer?" The answer to that question may surprise you. Here are some steps to follow:

  1. Start by choosing the cabinet's material. It can be made of oak, Formica, or another material. Decide whether you want to make the cabinet sealed or ported. Consider the size and height of the tweeter when making your cabinet. Next, determine the type of cabinet brace you'll use. If you're making a cabinet for a subwoofer, choose a brace with a larger cutout for the subwoofer driver.
  2. When putting the driver inside the cabinet, you need to make sure that you isolate it from the cabinet. You can do this with rubber washers. Usually, a 2-pound pillow weighs 1/3 of a kilogram, and you'll need about a third of that weight to make it work properly. The stuffing pillow will also help break up the sound that travels through the cabinet. This will help you make a small cabinet appear bigger.
  3. Once you have the material, you need to construct the cabinet. Depending on the design of your subwoofer, this process can take anywhere from two days to a week.
  4. After this, you need to cut pieces off of the lumber that are the size and shape of your driver.
  5. Finally, you need to install a foam strip to isolate the driver from the cabinet. This step is crucial to creating a high-quality cabinet for your subwoofer.
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Subwoofer and speaker home built examples

Subwoofer and speaker home built examples


If you are looking to build your own speaker, there are several techniques you can use to make the subwoofer box braced. Usually, these methods involve cutting a single piece of wood into a 3D-frame structure and then bracing the inside of the box. This will ensure that the subwoofer won't bend when a heavy object is placed on it. Also, make sure the box has enough space for the magnet and backside of the speaker.

The first step to bracing a DIY subwoofer is to determine the type of enclosure you'd like. There are two basic types of subwoofer enclosure:

  • Cylinder: Designed to protect the subwoofer cone from vibration and is ideal for a small room
  • Box-style: Designed to provide a sturdy base for the subwoofer's mount.

How to Install the Magnet?

Subwoofer magnets are made of a variety of materials and come in different shapes and sizes. To install the magnet, follow these instructions:

  1. Remove any screws holding the speaker cones in place—these should be found at the base of the speaker.
  2. Next, take off any grills or covers located on top of the subwoofer driver.
  3. Finally, remove any screws holding down or attaching the driver to its housing. Place the newly installed magnet in the center of the speaker, and attach it by screwing it down. Consult your local technical store again online for the best coil magnets.

Using a Power Amplifier

You can build a subwoofer using a power amplifier, but if you're not sure where to start, here are some tips.

  • Before you start, you'll want to know what kind of amplifier you have. A mono amplifier is ideal, as the outputs are clearly labeled. You can connect your subwoofer to its output jack if you have one.
  • Choose a mono subwoofer, if possible, and a subwoofer rated at 200 watts RMS or higher. Subwoofers with higher power ratings need an external amplifier. You can use a multichannel amplifier or a dedicated mono subwoofer amplifier. For best results, choose a rated amplifier that can handle the required amount of power. Otherwise, you may end up with a subwoofer that doesn't sound as good as you'd hoped.
  • Carefully consider the amplifiers' impedance. Make sure that the subwoofer you choose has the same impedance as the amplifier. You should also choose a subwoofer that matches the impedance of the power amplifier you're using. When comparing amps, remember that RMS represents the power output of an amplifier. This value will tell you how much power your amplifier can produce without distortion.
  • Another important consideration is the basic frequency response of your speakers. The frequency response of a subwoofer can make or break it. The parameters that determine this frequency response are called Fs, Qts, and Vas. In addition to this, you'll want to know the impedance of your speakers. Having a low impedance is a disadvantage, and it will put a lot of strain on your partnering amplifier.

Conclusion and Tips for Successful Builds

There are many different types of woofers on the market today. You can build a subwoofer from scratch or purchase a kit. It is important to have the right tools for the job. Know what you are working with before you start building your own subwoofer. It might be time to take your DIY skills to the next level with a pleasing project such as this.

Two heavy duty subwoofers

Two heavy duty subwoofers

More subwoofer examples

  • How to Make a DIY Cylinder Subwoofer (aka Sonosub)
    This is a how-to guide for making a sonosub-style DIY cylinder subwoofer. It is an excellent resource if you're thinking of building your own subwoofer, which you can easily build from sonotube (ducting pipe).
  • How to Design Your Own DIY Subwoofer
    This is a guide on how to build a DIY subwoofer to complement your home cinema/stereo system. With a bit of time and effort, you can build some awesome stuff!

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

© 2022 Kit

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