How To Fix a Blown Subwoofer

Highs and mids are punctuated by a subwoofer in a home entertainment set-up. Some people may feel cheated if they discover that their subwoofer has failed soon after purchasing it!

Even with brand-new speakers that you just bought and spent the time setting up, this might be a problem. It’s possible that your speaker is blown for several reasons. Defective or blown subwoofers will alter the audio of your content.

Table of Contents

Process of Fixing a Blown Subwoofer

Step 1- Examine the Voice Coil

It’s a good idea to thoroughly inspect your subwoofer before starting the task. Initiate by inspecting the voice coil for damage.

The voice coil is a critical part of the speaker since it amplifies the current flowing through it. A multimeter may be used to quickly test the voice coil’s performance. 

examine the voice coil

Simply plug the speaker leads to the multimeter and observe the results that emerge. There should be some resistance on the meter if the voice coil is indeed working, but if there is none, it’s likely broken. 

Step 2- Inspect the Speaker Cone

If the voice coil is already in excellent condition, you may wish to proceed to the following item, the speaker cone. Since the cone is normally suspended, evaluating it will be a breeze.

Do this all around the speaker’s diameter, gently pressing the cone against the sidewalls. After sinking in, the cone returns to its former orientation. When a speaker cone remains rigid, it indicates that it has been damaged.

Step 3- Remove the Speaker from the Structure

You’ll now know where the issue is based on the findings of your assessment of the voice coil and speaker cone. The restoration procedure may get off to a much better start from this point on. Taking the speaker out of its casing will be the first step.

Utilize the screwdriver from your tool kit for this task. Remove the speaker by unscrewing the mounting screws. Disconnect all of the related wires while you’re at it, but make a note of where each one goes so that you can easily re-fit it after the speaker has been fixed.

You should be aware that placing the cables in the incorrect spot might result in scratchy sound from the speaker. To ensure that you don’t misplace any of these screws, be sure to store them all in one place.

Step 4- Take off the Speaker Surround

You’ll need to disconnect the surrounds from the speaker enclosures after the speaker has been entirely removed from the structure and its wires have been disconnected. A plaster knife or tester edge may be used to cut through the glue holding the speaker’s enclosure to the frame.

Strip the surround, as well as the adhesive from the frame, with care and precision. Prevent puncturing the frame’s corners, which are very delicate, when doing this. Doing so might harm the speaker, and you’d rather avoid that.

Step 5- Disconnect the Speaker Cone as well as the Voice Coil

In order to proceed, you’ll need to detach the speaker’s cone & voice coil. As with the palette knife or tester blade in the previous stage, you’ll need a sharp tool for this phase as well. Gently release the speaker cone and voice coil from the subwoofer.

Splice the terminal wires carefully when you extract the coil, cone & spider. Ensure that all other parts are stored securely.

Step 6- Voice Coil Replacement

It is critical that the subwoofer’s voice coil be given top priority because of its importance. Once the problem is fixed, you’ll need a new coil in order to substitute the previous one. Cleaning the voice coil space should be your first logical step before doing anything else.

Having an air compressor on hand will come in helpful when it comes time to cleanse the coil. A fresh spider should be placed around the fresh voice coil once it has been installed within the space. Attach the cone to the middle of the new voice coil with sufficient force.

To ensure the glue has thoroughly cured, leave the subwoofer out in the open for a minimum of 24 hours.

Step 7- Restore the Speaker’s Frame

Now that the replacement coil has been installed, the speaker’s casing will need to be reinstalled as well. Put a little amount of adhesive to the corners of the surround where it will come into touch with the speaker body to keep it in place.

Cone and speaker frame borders should be connected to the surround, which is done by screwing it in place. For the glue to fully set, you’ll need to wait roughly 24 hours!

Step 8- Replace and Reattach Other Components

The next step is to assemble the speaker’s other parts and have it ready to go! Keep in mind that the cables we removed in step 3 should now be placed back in their proper locations. Just connect the new voice coil’s terminal leads to the old terminal leads. To keep them in place, utilize the soldering iron.

Carry this all around the speaker’s diameter, gently pressing the cone against the sidewalls. Sinking and then rising back up is the purpose of the cone. However, if it stays hard, your speaker’s cone has been destroyed.

Subwoofer pic

Lastly, rejoin all of the other parts that had been detached before. Make sure your subwoofer is well seated in its casing before tightening the mounting screws. It’s time to put your freshly repaired subwoofer to good use!

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Conclusion

In order to keep the high-frequency woofers in tune, a subwoofer is necessary. Nevertheless, if it’s in decent condition, this is doable. Do not be hasty in tossing out or replacing a blown subwoofer; it could still be recoverable.

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