How to keep the subwoofer box from sliding

The subwoofer is an essential aspect of a car audio system as it adds a thundering bass to your music. After a year of driving around with a subwoofer box in my trunk, I got tired of it moving around the trunk. And I am looking for how to keep the subwoofer box from sliding

Subwoofer boxes sliding around in the trunk can result in the speaker’s cone getting damaged since objects are more prone to move around in the trunk. Also, if the subwoofer moves on the floor in your car, the wires attached to the box can become loose, causing further car audio problems.

To resolve my problem, I explore the internet, discuss with the experts and personally try some DIYs. And finally, I got a solution to my problem. If you face the same issue, this post is for you. I tried to craft all the methods in easy and understandable language, so you will easily get it.

Read the entire post and check out all the methods – how to keep the subwoofer from sliding:

Using Velcro Straps

The best way to secure a subwoofer box down is using Velcro straps. It means no drilling holes or fitting in metal plates, as they look unprofessional and reduce the car’s value. Velcro also means that you can take your sub box in and out of the trunk without the hassle of removing screws. You can get all kinds of solid Velcro straps in online stores reasonably. 

Step by step process of using velcro straps:

1) Open the trunk to get to the subwoofer enclosure.

2) Flip the enclosure over to see the bottom side that the box sits on in the trunk.

3) Measure up and cut four separate straps that cover the length and width of the bottom base.

4) Peel away the sticky side of the Velcro straps and carefully place them up corner to corner on all four sides of the bottom of the box.

5) Now, line up your subwoofer enclosure where you want to secure it down in the trunk and place it down and apply slight pressure. The VelcroVelcro installed onto the bottom of the subwoofer in the trunk will be securely mounted because it will stick onto the carpet on the floor. 

Using Tape or Fastening Strips

Once you have marked the area, take some strong fastening strips or tape and secure the subwoofer box. Make sure that it is tight against the car to have minimal or no movement.

While securing, make sure you keep enough clearance around the box so that it can breathe and there is no build-up of heat.

You can attach the adhesive strips to the bare wood or fiberglass-made subwoofer boxes. The boxes come covered with cloth, which needs to be cut according to the size of the strips to secure the box perfectly in the vehicle.

Using Wood Pieces

To keep the box from sliding and hitting the trunk lid, arms, and the back of my trunk while driving. Sometimes the box is too heavy for Velcro to work and tape to hold, and I don’t want to use L brackets because I’d be putting screws into the car’s metal under the trunk carpet.

The best idea I have so far is cutting a few pieces of wood to fill the gaps around the box so it can’t move. That would be easier than making my wooden trunk floor, at least.

Using wood pieces to set the subwoofer box is a budget-friendly method, and you don’t need any expertise. But cutting wood pieces can be done very efficiently.

Use U-Bolts

If you want to skip Velcro, you can try this method. All you need to do is fasten some U-bolts through the sides of the box (Use rubber and fender washers on both sides) and run straps to the cargo hooks in the trunk or similarly secure mounting point.

Using Special Mats

The simplest way is to place on a trunk floor a special mat that will prevent side movements of a heavy enclosure.You can get these mats at any automotive store or online store along with carpets and rubber backing.

You place it in your trunk and drive away! Now your subwoofer has a stable surface to rest on, and the chances of moving around while vibrating go down significantly.

Mats are not great only to prevent moving. They also work as a cushion between the subwoofer and the trunk floor; it helps to reduce rattling and vibrations in the car.

Testing Methods To Keep Subwoofer From Sliding

You can use any of the methods as per your budget and convenience. But it is advisable to test after making any changes before going for a long ride. Ensuring that the car subwoofer stays in its place is essential to make it stable in the trunk.

This way, you will prevent it from getting damaged and avoid unpleasant occurrences during driving. It is also good to know that installing car subwoofers requires attention and patience.

It would help if you took special care of wires and always remembered their solid connection to avoid short circuits after accidental disconnection.

Frequently Asked Questions

Where do you put a subwoofer box?

You were facing the subwoofer upward while in the trunk, which gives you big bass without consuming a lot of space. This direction offers crisp sound with a slight advantage to high frequencies and treble and won’t rattle loose parts in your vehicle as much.

Does subwoofer placement in the box matter?

The differences in intensity were readily apparent. No matter what kind of vehicle you have or what type of subwoofer system, the placement of the subwoofer enclosure does impact the sound. So if you think the bass sounds louder when the sub is facing one way rather than another, you’re probably right.

Can a sub box be too big?

Add power if the box is too small (by a reasonable amount). Remember, there is such a thing as too big. As the enclosure size increases, the woofer’s mechanical limits will be easier to reach.

Where do I put my subwoofer in my car?

The Best Place To Put A Subwoofer In A Car Are:

  1. Place the Subwoofer box in the Car trunk. 
  2. You can also place it below Rear seat. 
  3. Front of the car. 
  4. Place Subwoofer under the Front seat.


There are many ways of keeping the subwoofer from sliding in your trunk. You can use a heavy bag or something similar to keep the subwoofer box in place. However, the methods we have described are pretty easy to do and don’t cost much.

You can achieve desired results without losing your pocket. So, we recommend going with any of the ways illustrated above so that it doesn’t irritate you anymore. And you will enjoy music without any hassle.

I hope these tips help you secure a subwoofer box from sliding into the trunk of your car. If you have any other issues with your audio system, feel free to share them with us. 

You can also check out our latest post.

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