How To Replace A Dust-Cap On Subwoofer? – Safe and Easy Method

Have you ever damaged the dust cap on your subwoofer or speaker and don’t have the ability to replace it? If so, this blog post is for you!

In this post, we will discuss the different types of dust caps, the tools and materials you need to replace it, and the safe and easy method for how to replace a dust-cap on subwoofer? Hopefully, this will help you get your dust cap replaced without any hassle!

In short, to replace the dust cap first heat the old dust cap sides using heat gun, then use a knife to remove it off. Next, match the size of the old and new dust cap, after that glue the old glue zone for the new dust cap and install it and wait for the glue to dry.

This is the short answer. I hope this will save your time; in case you don’t understand this then continue reading for detail and step by step process.

What Are the Benefits of Dust Cap?

Here are some of the benefits of having a dust cap on your subwoofer:

  • First, the dust cap is a cover that attaches to the cone of a subwoofer and protects it from dust and debris.
  • Second, the dust cap helps to minimize distortion and noise caused by the cone.
  • Third, the dust cap helps to extend the life of the cone by preventing it from oxidizing.
  • Finally, the dust cap also helps to prevent the cone from becoming damaged.

Types of Subwoofer Dust Caps

There are 3 different types of dust caps:

  1. The Spring Type: This is the most common type and consists of a metal spring that presses down on the cone.
  2. The Friction Type: This is similar to the spring type but includes a rubber or silicone pad that contacts the cone surface.  (This pad helps to reduce distortion and noise.)
  3. The Compression Fit Type: This is also similar to the spring type but includes a metal cup that fits over the cone.

Tools and Materials You Will Need

To replace the dust cap on your subwoofer, you will need the following tools and materials:

  1. Heat Gun
  2. Painting / masking tape
  3. Glue
  4. Strip of Paper
  5. Dust Cap (New)
  6. Wooden Spatula
  7. A glass or other item with a size that matches the dust cap’s exterior

How To Replace A Dust-Cap On Subwoofer? Step by Step

Here is the step-by-step guide for how to replace the dust cap from your subwoofer:

Step 1: Start By Heating Up The Heat Gun

Now that you have all the materials needed, start by heating up the heat gun and wait for 15 seconds before using it.

When the heat gun is fully heated then heat all the sides of the old dust cap.

Step 2: Use The Knife For Removal Process

After 15 seconds, use the knife to start removing the old dust cap. Make sure to be careful not to scratch the cone surface.

Step 3: Determine The Size Of Old Dust Cap

Once the old dust cap is removed, you will need to match the size of old and new dust caps. Once you have matched the size, remove the paper strip and place it on top of the new dust cap so that it is positioned properly.

Step 4: Clean The Old Glue Zone

Once the new dust cap matches the size, clean the old glue zone around it. Use the paint / masking tape to cover up all of the old adhesive.

Step 5: Apply Glue and Position New Dust Cap

Now that all of the cleaning and positioning is complete, apply a thin layer of glue to both sides of the new dust cap and position it over top of the cone.

Make sure that you hold down on one end using a wooden spatula or tap while doing so to ensure a proper seal.

Step 6: Set The Glass

Set the glass on the new dust cap and make sure that the entire assembly is properly aligned. Use the spindle lock to secure it in place.

Step 7: Wait For The Glue To Set

Now wait for the glue to set. Once it has, remove the masking tape and enjoy your freshly refurbished subwoofer!

Most Common Mistakes

Here are some of the most common mistakes that people make when attempting to replacing a dust cap from a cone:

  • Applying too much pressure when removing the dust cap
  • Removing the dust cap before the glue has had a chance to set
  • Using an incorrect tool for removal
  • Not being careful when removing the dust cap can result in scratches to the cone surface.
  • Reusing the old dust cap


In case you’re having trouble replacing the dust cap from the cone of your subwoofer, don’t worry! This guide will show you the safe and easy way to do it. All you need are the correct tools and some patience.

I hope after reading this guide, you’ll be able to replace the dust cap on your subwoofer cone and restore its look and function.


What should I do if the dust cap becomes stuck or damaged?

If the dust cap becomes stuck or damaged, then you will need to remove the dust cap and replace it with a new one. To do this, you will need to follow the steps outlined in this guide.

Will replacing the dust cap affect my sound quality in any way?

No, the dust cap on the speaker does not affect the sound quality in any way.

Why is the subwoofer dust cap on my cone located in a certain place?

There can be a few reasons why the cone dust cap on the subwoofer is located in a certain place.

  • One reason may be that the cone was designed to have the dust cap at this location to help with airflow and keep the cone clean.
  • Another reason could be that the cap is placed at this location because it helps to reduce interference with the sound produced by the speaker.

How long does it take to replace a speaker dust cap?

Replacing a speaker dust cap takes about 10 minutes on average. Depending on the size and complexity of the dust cap, it may take slightly more or less time to replace it.