How to Reduce a Subwoofer Port Noise

Written by david lipscomb Google
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How to Reduce a Subwoofer Port Noise
Reduce port noise for increased bass quality. (Creatas Images/Creatas/Getty Images)

Subwoofer port noise is generated if the velocity of the air escaping the end of the port is high enough. Typically caused by a hard edge on the port, the sound is usually mitigated by adding another component to the port. The goal is reducing the escape velocity of the air coming from the port, simultaneously dissipating it.

Skill level:

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Things you need

  • Measuring tape
  • Cyanoacrylate adhesive
  • Flared port
  • Drill with Philips bit
  • One inch Philips wood screws

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  1. 1

    Measure the diameter of the port in the enclosure. Select a flared port that fits tightly into the existing port tube.

  2. 2

    Apply a generous bead of adhesive around the inner edge of the existing port. Push the port flare into the port, so the flange is flush with the outside of the cabinet.

  3. 3

    Screw a Philips screw through each of the holes on the flange of the port, securing the port flare in the enclosure.

Tips and warnings

  • Stuffing the port with polyfill will work to reduce port velocity. However, it might also affect the sound of the subwoofer.

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