4Pcs 117mm/4.6in Speaker Port Tubes 45mm/1.8in Hole – ABS Plastic Bass Vents for 4-6 Inch Woofer, Airflow Inverter Kit

1.The speaker phase-inverting hole, also called sound tube or air hole, is often used in the inverted-phase speaker.2.It adopts ABS plastic material, sturdy and durable, suitable for 4-6 inch speaker.3.Smooth inner wall, with both ends designed as horn mouth. Smooth airflow, obviously reducing the sound.4.Long service life, not easy to damage, and you can use for a long time.5.It 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.Specification:Item Type:InverterTubeTotal Length: Approx. 117mm/4.6inHole Diameter of the Speaker Shell: Approx. 45mm/1.8inColor:BlackMaterial:ABS plasticCompatibility:4-6inches speakerPackage List:4 x Inverter Tubes

• Enhanced Bass Performance: Specially designed phase-inverting tubes direct airflow vibration to the front for powerful and deep bass effects with 4-6 inch speakers
• Construction: Made from durable ABS plastic material for long-lasting use and resistance to damage during installation and operations
• Smooth Inner Wall Design: Horn-shaped ends and polished interior ensure smooth airflow and minimize unwanted sound distortion for cleaner audio output
• Precise 45mm Hole Fit: Compatible with speaker shells featuring 45mm/1.8in diameter holes and total length of 117mm/4.6in for seamless integration into your audio setup
• Complete 4-Pcs Kit: Includes 4 inverter tubes to upgrade multiple speakers or create a balanced stereo system with consistent performance