Speaker Port Tubes for Bass Enhancer, Subwoofer Air Ports Repalcement & DIY Parts 71mm x 102mm Speaker Cabinet Port Tube, 2-Pack(Black)

• Made of ABS plastic material, sturdy and durable, suitable for 6-10inch speaker.
• Adopt exquisite workmanship, perfectly fit your speaker, reliable to use.
• The inner wall is smooth, with both ends designed as horn mouth. Smooth airflow, obviously reducing the sound.
• The speaker phase-inverting hole, also called sound tube or air hole, is often used in the inverted-phase speaker.
• 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.

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