Vent Minimum Port Size Calculation

Calculator to calculate the subwoofer vent minimum port diameter.

Enter Maximum Air Volume : Meter3
Enter Tuning Frequency : Hertz
Enter Number of ports :


Subwoofer Vent Minimum Port Diameter (D) =

For a vented enclosure to operate properly, the port diameter and length must be tuned for the enclosure volume and the speaker that it contains. The volume of air contained within the enclosure is a specific amount. The formula used as follows:

Minimum Port Vent Diameter = (2030 x ((V2/F)1/4) / √N)

V = Maximum Air Volume

F = Tuning Frequency

N = Number of Ports