4 Pcs ABS Plastic Speaker Port Tubes Inverted Design Smooth Airflow Bass Enhancer for 4 to 8 Inch Speaker Cabinets

1.Made of premium quality ABS plastic, this product is sturdy and durable.2.The inner side is smooth and the bell ends are designed at both ends. The airflow is very smooth and the airflow is obviously improved.3.The height of the inverted tube is 90MM and the opening is 76MM. It is suitable for speakers with 4-8 inch speakers.4.Speaker inverting holes, also called sound tubes and air holes, are often used in inverted speakers.5.The sound pressure of the airflow vibrating in the box is poured out to overlap the sound pressure radiated in front of the speaker to produce a bass effect.Specification:Item Type: Inverted TubeColor:BlackMaterial:ABSHeight: Approx. 90mm / 3.54in (as shown in picture)Opening: Approx. 76mm / 2.99in (as shown in picture)Package List:Inverted Tube x 4

• Enhanced Bass Performance: Our 76mm port tubes are engineered to improve airflow and sound pressure for a richer, deeper bass response that elevates your audio experience
• Smooth Airflow Design: Featuring smooth internal walls and flared bell ends to minimize turbulence and distortion for clear, powerful low-frequency output
• Precise Fit for 4 to 8 Inch Speakers: With a 90 mm/ 3.54inch height and 76 mm/ 2.99inch opening diameter, these tubes are perfectly sized to upgrade a wide range of speaker cabinets
• Durable Construction: Made from sturdy ABS plastic for long-lasting reliability and consistent performance in your audio setup
• Complete Upgrade Kit: Package includes 4 port tubes, providing everything you need for a seamless speaker enhancement project