How To Soundproof Trunks for Subs: The Must-Know Methods!

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Who doesn’t love a peaceful journey with family and friends with soothing music as per his taste? But as the car sound sometimes gets awful and mixed with outside sounds, it gives you a horrible headache. Besides, There are many reasons you might want to soundproof your car trunks.

How To Soundproof Trunks for Subs

Maybe you are using it to store a subwoofer and want to ensure the sound doesn’t leak out. Or perhaps you are using it to hold a noisy engine and want to keep the noise inside the car. In any case, soundproofing your car trunk is the best solution to enjoying better music in your car.

There are a few additional ways to soundproof your car trunks: acoustic foam, a noise-canceling car stereo system, and a soundproofing sealant. So, maybe you are looking for a better car audio experience. If so, you may wonder how to soundproof the trunk for subs. In this post, we’ll show you how to soundproof trunks for subs.

Why is Car Soundproofing Hard?

For several reasons car, soundproofing is hard. Though the car is not just a big solid piece of metal, they have a lot of small spaces and cavities that sound can travel through. And the surfaces of cars are not all smooth. They are covered in bumps, ridges, and other irregularities that can reflect and amplify sound.

On the other hand, cars are constantly moving, making it challenging to attach soundproofing materials to keep them in place. Also, the materials used in car construction are not typically designed to absorb sound, which makes it challenging to prevent sound from entering or leaving the car.

6 Best Ways to Soundproof Trunk for Subs

No one perfect way to soundproof a trunk for subs is here. However, there are a few methods that are more effective than others. The most important thing is to seal the trunk as best as possible to keep the sound from escaping. You can use a variety of materials and some steps to do this.

So, let’s talk about some steps that are the best ways to soundproof trunks for subs.

Sound-deadening Material

A few different types of sound-deadening materials can be used to soundproof a trunk for a subwoofer. One option is to use a thick layer of insulation. This can be done by installing a layer of insulation between the subwoofer and the trunk wall or using a sound-deadening material specifically designed for this purpose. Some commercial products can soundproof a trunk, such as Dynamat.

These products typically consist of a thick, rubber-like material applied to the inside of the trunk. This material helps to absorb and dampen sound waves, which helps to reduce noise from the subwoofer.

Use an Enclosure

The enclosure is a box specifically designed to house one or more subwoofers. The enclosure helps to reduce the amount of sound that is transmitted from the trunk to the passenger compartment. It also helps to improve the sound quality of the subs by reducing distortion.

Trunk Lid Seal

The trunk lid seal is used to create a soundproofing barrier between the trunk and the cabin of the car. This is important for two reasons. First, it prevents the noise from the subs from interfering with the sound quality of the music being played inside the car.

Second, it helps to keep the noise from the subs from being heard by the people outside the car. The trunk lid seal is made of high-density foam designed to absorb sound. It is attached to the trunk lid with a strong adhesive that will keep it in place even when the car is in motion.

Rug or Carpets to Line the Trunk.

Adding a rug or carpets to line the trunk can be an effective way to soundproof your vehicle for subs. The thickness of the rug or carpet will help to absorb and minimize the sound of the bass coming from the subs.

Additionally, lining the trunk with a rug or carpet can help to keep the trunk area weatherproof.

Foams or Egg Crates

Using Foam or egg crates in the trunk of your car can help to soundproof it and improve the sound quality of your subwoofer. The foam or egg crates will help to deaden the subwoofer’s sound and keep the sound from bouncing around the trunk. This will help to improve the sound quality and make the bass sound richer and fuller.

Using Long-lasting Door Insulation

Using durable door insulation ensures better soundproofing of your cart. This insulation is designed to keep out noise and keep the interior of the car quiet. It is also effective at keeping the temperature inside the car consistent, which is essential when using a subwoofer.

Benefits of Soundproofing a Trunk for Subs

A bunch of benefits of soundproofing trunks for subs are here when you are going on a long journey or having fun with friends and families. Let’s talk about some of these;

  • It eliminates road noise and makes the system sound louder
  • It improves the sound quality of the music and protects the speakers from damage
  • It keeps the trunk cooler, which can improve the lifespan of the system
  • It makes your journey smoother
  • Enhance the quality of your driving experience

Is Trunk Noise a Problem For The Subwoofer?

It depends on the specific subwoofer, the amplifier, and the enclosure design. In general, trunk noise can be a problem for subwoofers, but there are many ways to mitigate it. Some of these are,

  • Using a sealed enclosure for the subwoofer. This will help to isolate the subwoofer from the rest of the car and minimize noise.
  • Another option is to use a ported enclosure, which will also help to reduce noise.
  • Using a high-quality amplifier can also help to reduce noise.
  • Ensuring all the wirings are appropriately secured can also help minimize noise.

5 Material Buying Tips for The Soundproof Tunks for The Subs

When looking for materials to soundproof your trunk for a subwoofer, there are key points to keep in mind.

  • The most important factor is the thickness of the material. You will want to find material at least 1 inch thick.
  • Other factors to consider are the density and weight of the material. The denser and heavier the material, the better it will absorb sound. Some suitable materials to consider are rubber, foam, and carpet.
  • How effective the material is at absorbing sound.
  • And last but not the list is the Price. There are many options for the materials to soundproof trunks for subs in the market. Find your best deal, and one more thing is the better your product, the higher its Price.

Related FAQs

What is the best way to soundproof a trunk for subs?

The best way to soundproof a trunk for subs will vary depending on the specific vehicle and the subs that are being used. However, some tips on how to soundproof a trunk for subs include adding insulation to the trunk, using a soundproofing material such as Dynamat, and adding a sealed enclosure for the subs.

How can I keep the sound from my subs from leaking out of my trunk?

There are a few ways to keep the sound from your subs from leaking out of your trunk. You can do it by insulating your car trunk, which will help to dampen the sound. Also, using soundproofing material, such as Dynamat, will help to absorb the sound.

What materials are commonly used for soundproofing trunks?

Commonly used materials for soundproofing trunks include mass-loaded vinyl (MLV), acoustic foam, butyl rubber sheets, and closed-cell foam.


So. that was all about soundproofing trunks for subs. You’ll need to soundproof your trunk if you want to add some bass to your car audio system. You can use any method to do this, but the most important thing is to ensure the insulation is effective at blocking sound.

Also, you can consider a subwoofer enclosure to reduce noise further. This overall process will ensure not better soundproofing. Also, it will enhance the overall decoration of the car interior.

Even when you are not listening to music, it will help to reduce outside noise and enhance your driving experience.

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David Briley

David Briley

My name is David Briley, a soundproofing expert with a burning passion for curating and creating audio since adolescence. The need for a quiescent working and living environment cannot be overemphasized.

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