79mm x 110mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Curtain Grommets strong bending

strong bending

folding chairs

56"(L*W*H)

Holding Force : 1050N

200(+/-2%) x Hollow Copper Rivet

79mm x 110mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box 2pcs Curtain Grommets strong bendingFeatures: 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