# Vent Minimum Port Size Calculation

Calculator to calculate the subwoofer vent minimum port diameter.

Maximum Air Volume | = ^{3} |

Tuning Frequency | = |

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 ((V

V = Maximum Air Volume

F = Tuning Frequency

N = Number of Ports

Minimum Port Vent Diameter = (2030 x ((V

^{2}/F)^{1/4}) / √N)V = Maximum Air Volume

F = Tuning Frequency

N = Number of Ports