Speaker Port Tube Sponge, 4 Bass Tube Sponge Plugs with Air Duct to Minimize Standing Waves, Improve Bass Response

[Main Function] The speaker port tube sponge can minimize standing waves caused by speaker vibrations, reduce wind noise and hum, effectively improving mid-bass sound.
[Universal Compatibility] The speaker guide tube sponge is suitable for upgraded speakers, home speakers, car speakers, portable speakers, and subwoofers.
[Improve Bass Response] The port tube sponge plug provides a better bass reflection effect for speakers, thus improving the bass response of many types of speakers.
[Easy Installation] Simply insert the sponge into the speaker port tube to improve sound quality. The diameter is 55mm and the height is 50mm.
[Choose the Correct Sponge Size] The sponge diameter should be slightly 5mm larger than the inner diameter of the speaker port tube, in order to that it can be stably wedged into the port tube.