Speaker reversal hole, also called sound tube and air hole
Commonly used in vented speakers
It is mainly to suppress the airflow sound of the vibration of the horn in the box
and the sound pressure radiated in front of the horn overlaps with the sound pressure in the front.
Produces a bass effect. All plastic material one-shot manufacturing, black.
Specifications are opening 43 total length 146
Hole 43 refers to the casing opening with a diameter of about 146mm to fix this
The total length of 146 means that the length of the microphone is about 146mm.
Inner hole diameter: about 39mm
Package Including:
Speaker Port Tube

 x 1pcs
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