How To Fix The Voice Coil On Your Subwoofer

Subwoofer’s voice coil will not produce sound when damaged, so how to fix the voice coil on your subwoofer? Voice coil converts electrical output to sound so when it’s not functioning then there’s no sound and something is wrong. It can be shorted, opened or deformed due to overheating.

What you need:

  • Screwdriver
  • Flash light
  • Small container for the screws
  1. If you were currently using the subwoofer, turn the audio system off first then plug the power cord out. Never diagnose with the power or electricity still running.
  2. Take a look at the connections between your audio to your subwoofer. Check the terminals where cords are supposed to be connected. Loose connections may affect the quality of the sound or may cause the audio system not to produce any sounds at all. Try to use another set of cable connections, it might be that the cables are broken or made of poor quality. When the connections are replaced turn on your audio system again and test the sound. If the problem still exists then follow the next step.
  3. Unscrew the enclosure of the subwoofer to check the coil. Try to sniff around inside if there’s any burnt smell or use the flashlight to inspect it. If the coil is shorted, opened or deformed even just a little, this will cause overheating and distortion then eventually will stop functioning. For large speakers, it is possible to unwind and replace the wiring wrapped around the voice coil however the replacement wire even the adhesive used to reassemble the parts together may not withstand high volume or too much heat and may not even last long since the wire and the adhesive aren’t original and may not have the factory qualities designed or made for the subwoofer. Thus, it is always cost effective to buy a new one.
  4. Before replacing your subwoofer, check the warranty first. The subwoofer’s replacement or repair might still be covered by its warranty.


  • How you take care of your subwoofer will also play a big part if you want to prolong its life. Unnecessary playing of loud music for too long, mishandling of speakers or placing the speakers in direct heat are just some reasons why your audio equipment may not last long.

  • When buying a subwoofer look for built in insulation or a ventilation system in the driver or in the coil itself to help lessen the possibility of overheating. Check the specifics of the product first before buying.

  • Subwoofers with boxed enclosures may be better off than ported enclosures since it is less affected by changes in outside temperature or humidity.

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