MEETOOT 2PCS Air Guide Tube Opening 58mm Speaker Exit Guide Exhaust Tube Speaker Box Port Tube Subwoofer Vents

Compatible with most brands of PA/DJ Subwoofer Speaker Cabinet Suggested Cabinet Cutout:3 inches Condition:Brand New Color:Black Material:Plastic Outside diameter (including flange):77mm/3 inches Maximum inner diameter: 58mm/2.28 inches How to choose the right size of speaker box porting tube? 1. Set the cross-sectional area of the ported tube as S1 and the effective vibration area of the woofer as S2, S1=(0.1-0.4)S2 is the best. According to the formula, the cross-sectional area of a 2-inch port tube is suitable for 3.5, 4, 5 and 6-inch woofers. 2. Port Tube Length LV-(1.463x107R 2)/(FB2VB)-1.463R, where:[V is the length of the port tube, R is equal to the radius of the opening of the port tube, and all units are in inches; FB is the tuning frequency in Hertz; and V is the volume of the sound system in cubic inches. Note:These port tube dimensions are measured manually and may have some slight errors. Please measure and confirm again after receiving the goods to make sure the opening of the speaker box is the right size. If the opening is too big, you can use some glue to fix it. Package Includes; 2 x Speaker Port Tubes

• Product Type: New speaker box port tube, unique sound enhancement mechanism, when the speaker works, the speaker diaphragm sounds, and its rear will also produce vibration. After installing the port tube, because its tube diameter is smaller than the diameter of the speaker, there will be a stronger sound wave from the inverted tube rushed out, the effective use of sound waves before and after the speaker, significantly improve the sound quality of the speaker.
• accurate size specifications: outside diameter (including flange) 77 mm (3 inches), the maximum inner diameter of 58 mm (2.28 inches), the length of 60 mm (2.35 inches), the precise size to adapt to a variety of speaker needs.
• High quality material: the ported tube is made of high quality material, sturdy and durable, effectively reducing resonance and sound distortion, guaranteeing the purity of sound . Precise specifications, carefully designed and tuned to optimize air flow and enhance sound performance .
• Precise adaptation: designed for PA/DJ speaker cabinets, compatible with a wide range of audio, to ensure a seamless match, play the best performance .
• Affordable Pack: 2Pack in one purchase, economical, meet the needs of two-channel or multi-speaker system, cost-effective .