4PCS T1 Bass Speaker ABS Plastic Smooth Inner Wall Inverted Tube for 5-6 inches Speakers

Feature: 1. Made of ABS plastic, it is sturdy and durable. Inner wall is smooth, and the flare ends are designed at both ends. 2. Airflow is very smooth, and the airflow sound can be obviously improved. Meanwhile, it is suitable for 5-6 inches speaker. 3. The speaker phase-inverting hole is also called the sound tube and the air hole, is often used in the inverted-phase speaker. 4. Its function is mainly to pour the sound pressure of the airflow vibrating inside the box to the front and the sound pressure radiated from the front of the speaker to produce a bass effect. 5. Via precision craft by many experts, such inverted tube is entitled with high performance according to strict rule. Specification: Item Type: Inverted tube Total Length: Approx. 100mm 3.9 in (As picture shown.) Speaker Housing Opening Diameter: Approx. 53mm 2.1 in (As picture shown.)

Package List: 4 x Inverted Tube