2PCS Inverter Tube,T9 6-10inches Subwoofer Woofer Bass Speaker Ports Vent Connectors 71mm Hole Inverter Tubes,Make a Bass Effect,for 6-10inch Speaker (T9 opening 71)

• STURDY AND DURABLE：Made of ABS plastic material, sturdy and durable, suitable for 6-10inch speaker.
• PERFECTLY FIT：Adopt exquisite workmanship, perfectly fit your speaker, to use.
• AIRFLOW：The inner wall is , with both ends designed as horn mouth. airflow, obviously reducing the sound.
• OFTEN USED IN：The speaker phase-inverting hole, also called sound tube or air hole, is often used in the inverted-phase speaker.
• USAGE DESCRIPTION：The inverter tube is mainly to pour the sound pressure of the airflow vibrating inside to the front, and overlap with the sound pressure radiated from the speaker to make a bass effect.

Description Specification Item Type: Inverter Tube Total Length: Approx. 102mm/4in (as shown) Hole Diameter of the Speaker Shell: Approx. 71mm/2.8in (as shown) Material: ABS plastic Compatibility: 6-10inches speaker Package List 2 x Inverter Tubes