2Pcs 52.8mm x 52mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Box Vent Linear Ball Bearings drainage and other walks of

drainage and other walks of life level control and alarm

red indicator light

Screw Termination

Note Ribbon: Cable is used to press terminal wires

2Pcs 52.8mm x 52mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Box Vent Linear Ball Bearings drainage and other walks ofFeatures: Speaker Port Tube is used to improve the bass response of many types of speakers. There are plenty of types to help you with your vented box design, and carries tubes of every shape and size, including adjustable length ports and flared ports. These port tubes are a reliable, convenient installation, while at the same time providing a finished, "pro" look to your bass reflex speaker building project. Normal tubes suffer from nasty turbulence