How To Make A Sealed Speaker And Subwoofer Box Louder

A sealed speaker and subwoofer box is a great way to get better sound in your home without having to buy new speakers or spend money on an expensive sound system. However, it can be difficult to make the box louder than what you’re already getting. Here’s how you can do just that with some easy DIY tips.

The how to make a sealed box ported is a guide that teaches you how to build a speaker and subwoofer box that will be louder than the original.

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Boxes for speakers and subwoofers may be sealed or ported. The sound produced by sealed speaker boxes is punchier and more precise. Sealed subwoofers provide a more precise frequency response and a more believable rendering of instrumentals.

Sealed enclosures are more comfortable to listen to than ported enclosures, but they aren’t as loud. You may, however, employ a variety of techniques to make them louder. We’ll look at ways to make your sealed speaker or subwoofer box sound louder and better in this post. 

How to Boost the Volume of Your Sealed Speaker Box

A sealed box is a kind of enclosure used by your subwoofer to provide the most precise and flawless bass audio output.


You can make it louder and better by doing the following:

Any leaks should be sealed in the box.

Sound pressure levels are known to be reduced by air leaks. Your subwoofer will not sound bad at high levels because of the airtight seal established by sealing the interior of the box.

On the insides, the ideal technique is to use wood glue. Glue the plastic terminal cup for connecting speaker wires to the box and the amp inside the box if your box has one. 

Fill the space with polyfill.

The white substance seen in pillows and bed coverings called polyfill. It’s used in subwoofer boxes to make the speaker believe it’s in a much larger enclosure. As a consequence, the bass is richer and more enjoyable. 

Make The Box Tighter

Screws hold the subwoofer and the termination cup in place in the box. To obtain the best seal, use a hand drill or screwdriver to tighten each screw completely.

Invest in a Long-Lasting Speaker Box

Whether you are a certified music aficionado or not, purchasing a sturdy speaker box is critical for safeguarding your pro-audio equipment.

A decent speaker enclosure may give you with the confidence that your speakers will not wander no matter how rough the road becomes, in addition to delivering great sound quality.

The kind of wood chosen to construct your speaker box will influence how nice it sounds. Medium-Density Fiberboard and Baltic Birch Plywood are two materials that are suggested.

Invest in a thicker speaker cable.

For their sub and speaker box, many speaker owners utilize electrical extension cables as speaker wires. While this is a good and inexpensive budget system, it doesn’t function as well when a 1000 watt RMS is sent over it.

They have copper wire strands that can’t handle the current, which isn’t good for audio quality. 

Use a 12 gauge oxygen-free copper speaker wire to be on the safe side.

How to Boost the Volume of Your Sealed Subwoofer Box

There are many methods to improve the sound of a subwoofer box. The structural design is the most important consideration.


Seem professionals have devised a number of tried-and-true methods for making your subwoofer box sound louder, which are described below:

Purchase a new subwoofer box or tighten up your existing one.

Isn’t it strange? The kind of box you have has a lot to do with how loud a subwoofer box can be. You can easily change your subwoofer box if you discover you have the incorrect kind for your musical preferences.

If you don’t have the funds to purchase a new subwoofer box, try tightening the screws on the one you already have. To tighten it, get fresh screws, a new coat of adhesive, or anything else you can think of. Check out our post on how to seal a subwoofer box for additional information. 

Use Poly-fill to Fill Your Sealed Box

Filling your subwoofer box with Poly-fill is one of the greatest methods to enhance the sound.

The air within the box slows down when poly-fill is added, resulting in a deeper and fuller bass sound. Check out our post on how much polyfill you need for a sealed subwoofer to learn more. 

Invest in a More Powerful Subwoofer Box

Although this works with both Ported and Sealed boxes, the impact is stronger with sealed boxes.

Sealed enclosures force pressurized air to circulate around the box, causing the wood fibers to expand and become inefficient over time.

You may have a custom subwoofer box built using a stronger material than wood since sealed boxes are simpler and easier to manufacture.

How to Improve the Sound of Your Sealed Subwoofer Box

It is critical to optimize your subwoofer box; it is a key component of your listening experience. However, it is just a box.

A subwoofer box is just a container designed to keep your subwoofer safe and sound forever. So, now that you have the appropriate subwoofer box and it is louder, how can you improve the sound of your subwoofer box?

Select the Correct Subwoofer Box Dimensions

In the case of subwoofers, a bigger box does not always imply a greater sound. Lower bass feedback is caused by a subwoofer box that is the incorrect size for your subwoofer.

As a result, if your subwoofer’s box is bigger than the recommended size, it will not sound well. It has even been known to cause subwoofer damage over time.

Proper Positioning

Certain listening locations, particularly when setting up the subwoofer in a room, will sound better than others.

Make sure your subwoofer box is not in a corner and is several inches away from a wall. Play some strong bass music while you’re doing this to get a better sense of the bass response.

Increase the Heat Sink’s Surface Area

Your subwoofer system’s natural enemy is heat. Extending the heat sink on your amplifier will improve the performance of your subwoofer.

This is particularly essential if you want to use the subwoofer often and for an extended length of time.

Check the available space in your subwoofer box to determine if a bigger heat sink can be added. This increases the heat sink’s surface area, allowing it to dissipate more heat and keep the amplifier cool.

Tuning a Subwoofer Properly

This is a simple but time-consuming method to improve the sound quality of your box. In theory, you should fine-tune your subwoofer to the ideal setting for your subwoofer box.

Because each subwoofer box is constructed differently, the same setting may not be applicable to all subsystems. Check out our post on the finest subwoofer box design for deep bass to learn more.

You must determine the proper frequency to utilize in your box, which may be difficult for some individuals. It’s more a matter of finding the appropriate settings for the bass and sound we want from our subs.

Last but not least,

What matters most when attempting to obtain the greatest performance out of your subwoofer is how it will sound to your ears. Make sure the bass is well-integrated with the other frequencies, invest in a well-designed subwoofer box, and hook up an amplifier, and you’re good to go.

The subsonic filter sealed box is a speaker enclosure that is sealed with a subwoofer. It can be used to make the sound louder.

Frequently Asked Questions

How can I make my subwoofer box sound better?

You can improve the sound quality of your subwoofer by using a high-quality audio amplifier.

How do you adjust a sealed subwoofer box?

You can adjust the sealed subwoofer box by pulling on the front of the speaker.

Do sealed boxes hit harder?

Yes, they do. Sealed boxes are about twice as powerful as regular ones.