Bass Reflex Calculator

The Bass Reflex Calculator calculator can be used to design a bass reflex enclosure for a speaker system.

Input Parameters

Calculation Results

Calculation Formula

Vport = Vbox * (fb / f0)3

Where:
Vport = Port Volume (cu ft)
Vbox = Box Volume (cu ft)
fb = Desired Tuning Frequency (Hz)
f0 = Driver Resonant Frequency (Hz)

Bass Reflex Calculator Calculator Usage Guide

Learn how to use the Bass Reflex Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the driver diameter in inches.
  2. Enter the driver sensitivity in dB @ 1W/1m.
  3. Enter the driver impedance in Ohms.
  4. Enter the desired tuning frequency in Hz.
  5. Enter the air displacement in in³ @ 1Hz.
  6. Enter the box volume in cu ft.
  7. Click the "Calculate" button to compute the port volume, diameter, and length.

Understanding the Results

The calculator provides the following results:

  • Port Volume (cu ft): The volume of the port needed for the desired tuning frequency.
  • Port Diameter (inches): The recommended diameter of the port.
  • Port Length (inches): The recommended length of the port.

Principles of Bass Reflex Enclosures

Bass reflex enclosures, also known as ported boxes, are designed to improve the low-frequency response of a speaker system. The port helps to maintain a lower resonant frequency (f0) and extends the low-frequency output.

The formula used in this calculator is based on the relationship between the box volume, tuning frequency, and port volume. The port dimensions are calculated to achieve the desired tuning frequency and optimize the speaker's performance.