MECCANIXITY 8Pcs 38x147mm/1.5 x 5.8 Inch Speaker Port Tube Subwoofer Bass Box Tube Bass Woofer Box Speaker Box Bass Air Port for DJ/PA Speaker Cabinets

What is this? 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. What will I get?
Total Length: 147mm/ 5.8 inch;
Opening Diameter: 38mm/ 1.5 inch;
Maximum Diameter: 70mm/ 2.8 inch;
Material: ABS
PlasticIn the package of: 8Pcs x Speaker Port TubeAre there any advantages of the product? Normal tubes suffer from nasty turbulence at the entrance and exit of the port, producing unwanted noise and poor sound quality. This port tubes can overcome the situations and you can experience good looks, low distortion, and superior overall sound quality. How to use it? These port tubes are a reliable, convenient installation, while at the same time providing a finished, "pro" look to your bass speaker building project. Standard mount holes make this tube easier to install than others on the market. What should I notice? Please check the size clearly before buying the speaker in the box.