Speaker port tubes are used to improve the bass response of many types of speakers. Many types are useful for vented box design. Parts Express carries tubes of all shapes and sizes, including adjustable-length and flared ports. These port tubes offer a reliable and convenient installation method while also providing a finished, professional look to your bass-reflex speaker building projects. Regular tubes suffer from troublesome turbulence at the port inlet and outlet, creating unwanted noise and low-quality sound. This port tube overcomes this problem, resulting in aesthetics, low distortion, and overall superior sound quality. With standard mounting holes, this tube is easier to install than other tubes on the market. Please clearly check the installation size before purchasing.