2 Pcs Speaker Port Tube Foam Reduce Standing Wave Bass Air Port Sponge Plugs for Speaker Cabinet Port Tube 90mm Dia.

Feature: 1. Function: Reduces standing waves caused by speaker vibrations, decreases wind noise and hum, effectively enhances the listening experience of mid low frequencies. Provides better bass reflex effect for speakers and enhances bass response for many types of speakers. 2. Applicable to: Speaker port tube foam is suitable for improved speaker boxes, speaker cabinets, home speakers, car speakers, portable speakers, PA DJ subwoofer bass boxes. It is used for speaker port tubes, speaker box bass air ports, and speaker cabinet port tubes. 3. Note: Choose the Diameter size of foam plugs according to the inner Diameter of the speaker port tube. The foam Diameter should be slightly larger by 5mm than the inner Diameter of the speaker port tube. A slightly larger foam can be stably stuck in the speaker port tube. 4. Easy Installation: Select the correct size foam and insert it into the speaker port tube. The entire installation process is quick and easy, and does not take much time. 5. Product Size: The sponge has a Diameter of 90mm and a height of 80mm, please make sure the size is what you need before purchasing to avoid wrong buying and other problems. Specification: Item Type: Speaker Port Tube Foam Material: Sponge Size: Approx. 90mm 3.5in in diameter, 80mm 3.1in in height. Package List: 2 x Speaker Port Tube Sponge Note: The sponge is produced by stamping process, and slight dimensional errors in the product are normal.