2Pcs Speaker Port Tube, 65mm x 160mm ABS Speaker Cabinet Port Tube Subwoofer Bass Reflex Tube

Premium Material - ABS plastic is sturdy and lightweight. Solid, the inner wall is very smooth.Profession - The airflow is smooth, reducing the noise caused by the airflow, can Increase the bass response of your system without increasing the power of the speaker itself.Versatile - The sound pressure of the airflow vibrated by the speaker in the box is poured out and the sound pressure radiated from the front of the speaker overlaps to produce a bass effect.Speaker Port Tube is used to improve the bass response of many types of speakers.Easy to Installation - Suitable for power amplifier speakers, build your own speakers or replace old speakers.Dimension:37mm x 80mm - Big Hole Outer Dia: 44mm / 1.73", Inner Dia: 31mm / 1.22", Small Hole Outer Dia: 33mm / 1.3", Small Hole Inner Dia: 28mm / 1.1", Opening Hole Diameter: 37mm / 1.45";43mm x 80mm - Big Hole Outer Dia: 60mm / 2.38", Inner Dia: 35mm / 1.38", Small Hole Outer Dia: 38mm / 1.5", Small Hole Inner Dia: 33mm / 1.3", Opening Hole Diameter: 43mm / 1.69";65mm x 160mm - Big Hole Outer Dia: 103mm / 4.05", Inner Dia: 44mm / 1.73", Small Hole Outer Dia: 42.5mm / 1.67", Small Hole Inner Dia: 39mm / 1.53", Opening Hole Diameter: 65mm / 2.56";85mm x 140mm - Big Hole Outer Dia: 120mm / 4.72", Inner Dia: 59mm / 2.32", Small Hole Outer Dia: 57.5mm / 2.26", Small Hole Inner Dia: 54mm / 2.12", Opening Hole Diameter: 85mm / 3.34";Specification:Material: ABSPackage Include: 2 x Speaker Port Tube

• Premium Material - ABS plastic is sturdy and lightweight. Solid, the inner wall is very smooth.
• Professionality - The airflow is smooth, reducing the noise caused by the airflow, can Increase the bass response of your system without increasing the power of the speaker itself.
• Versatile - The sound pressure of the airflow vibrated by the speaker in the box is poured out and the sound pressure radiated from the front of the speaker overlaps to produce a bass effect.Speaker Port Tube is used to improve the bass response of many types of speakers.
• Easy to Installation - Suitable for power amplifier speakers, build your own speakers or replace old speakers.
• Dimension: 37mm x 80mm - Big Hole Outer Dia: 44mm / 1.73", Small Hole Outer Dia: 33mm / 1.3", Opening Hole Diameter: 37mm / 1.45"; 43mm x 80mm - Big Hole Outer Dia: 60mm / 2.38", Small Hole Outer Dia: 38mm / 1.5", Opening Hole Diameter: 43mm / 1.69"; 65mm x 160mm - Big Hole Outer Dia: 103mm / 4.05", Small Hole Outer Dia: 42.5mm / 1.67", Opening Hole Diameter: 65mm / 2.56"; 85mm x 140mm - Big Hole Outer Dia: 120mm / 4.72", Small Hole Outer Dia: 57.5mm / 2.26", Opening Hole Diameter: 85mm / 3.34";