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Speaker Cabinet Port Tubes for PA/DJ Speaker Cabinets Subwoofer Bass Reflex Tube Bass Box Vent, Compatible Model SAPR402G, 2" (52.8mm x 52mm) - 2Pack

Description:

About this item:

  • 【Port Tubes Function】speaker exposes the speaker diaphragm to produce sound, and there is also vibration at the back of the speaker. After installing the port tubes,as the diameter of the port tubes is smaller than the diameter of the speaker, a relatively strong sound wave will rush out of the inverted tube. the sound waves towards the front and back of the speaker are utilized, Improve the sound quality of the speaker
  • 【Dimensions】Outer diameter (including Flange): 69mm/2.72", Maximum inner diameter:52.5mm/2.07", Minimum inner diameter:50mm/1.97", Length:52mm/2.05"
  • 【Speaker Cabinet Vent Diameter】Compatible Model:SAPR402G, fit for most brands of PA/DJ Subwoofer Bass Speaker Cabinets Box Vent, Cabinet Cutout: 2"
  • 【How to Choose Size】Set the cross-sectional area of the Port Tubes as S1, the effective vibration area of the bass horn as S2, and S1=(0.1-0.4) S2 is the optimal. Port Tubes length LV=(1.463 * 107R ^ 2)/(FB2VB) -1.463R, among them: LV is the length of the port tubes, R=the opening radius of the port tubes, all in inches; FB is the tuning frequency, in Hz; VB is the volume of the sound system, measured in cubic inches
  • 【Package Includes】2" Speaker Port Tubes - 2Pack

  • Speaker Cabinet Port Tubes
    Model: SCPT-2"x2", Compatible Model: SAPR402G
    Compatible with most brands of PA/DJ Subwoofer Bass Speaker Cabinets Box
    Suggest Cabinet Cutout: 2.07"

    Condition: New
    Color: Black
    Material: Plastic
    Outer diameter (including Flange): 69mm/2.72"
    Maximum inner diameter: 52.5mm/2.07"
    Minimum inner diameter:50mm/1.97"
    Length: 52mm/2.05"

    How to choose the speaker cabinet port tubes at suitable size?
    1.Set the cross-sectional area of the Port Tubes as S1, the effective vibration area of the bass horn as S2, and S1=(0.1-0.4) S2 is the optimal. according to the calculation formula, the cross-sectional area of 2" Port Tubes fit for 3.5", 4", 5" and 6" Bass Speaker
    2.Port Tubes length LV=(1.463 * 107R ^ 2)/(FB2VB) -1.463R, among them: LV is the length of the port tubes, R=the opening radius of the port tubes, all in inches; FB is the tuning frequency, in Hz; VB is the volume of the sound system, measured in cubic inches

    Note: The dimensions of these Port Tubes are all manually measured, which may result in some slight errors. Please measure and confirm again after receiving the goods to ensure that the speaker cabinet cutout is just right. If the cutout is too large, you can use some glue to fix it

    Package Includes:
    2" Speaker Port Tubes - 2Pack

    Review:

    4.7 out of 5

    93.33% of customers are satisfied

    5.0 out of 5 stars Very good

    Y.R. · June 15, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Very good

    5.0 out of 5 stars Good quality

    w.c. · June 8, 2025

    Good as expected

    5.0 out of 5 stars Bass ready

    P.M. · May 13, 2025

    Exactly what I needed. Good quality.

    5.0 out of 5 stars great

    m. · February 27, 2025

    ports for woofer harley bags

    5.0 out of 5 stars Great port to tune my bass combo amp

    G. · July 22, 2024

    Needed a 4x4" port to replace the stock one in my combo amp. Wound up cutting the depth to 3" for tuning reasons. This worked out perfectly!

    3.0 out of 5 stars Ok

    A.C. · April 15, 2025

    Liked the cage design but wish they came in longer lengths.

    5.0 out of 5 stars They are

    T. · August 15, 2024

    They are what they say. Seems to be somewhat durable. Installed easily.

    5.0 out of 5 stars works good!

    M. · September 3, 2024

    works as intended

    Not too bad.

    K. · April 2, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Not too bad. Needed some sanding and trimming to make them look perfect. Just a bit rough out of the molds.

    Speaker Cabinet Port Tubes for PA/DJ Speaker Cabinets Subwoofer Bass Reflex Tube Bass Box Vent, Compatible Model SAPR402G, 2" (52.8mm x 52mm) - 2Pack

    4.6

    AED6891

    Size: 2"x2"

    Quantity:

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    Return and refund policies

    Product origin: United States

    Electrical items shipped from the US are by default considered to be 120v, unless stated otherwise in the product description. Contact Bolo support for voltage information of specific products. A step-up transformer is required to convert from 120v to 240v. All heating electrical items of 120v will be automatically cancelled.

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