Specifications are openings 50 total length 142. Hole 50 refers to the box shell opening diameter of about 50MM to fix this, the total length 142 is the sound tube length of about 142MM.
Speaker inverting hole, also called sound tube and blowhole, is often used in phase-inverted sound box. It mainly uses the sound pressure of the speaker’s vibration in the box to pour out the sound pressure in front of the speaker and then radiates to produce the bass effect.
Material: ABS plastic
2pcs（90 days after receipt of order ）
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