**Subwoofer Box Comparison Calculator:**

Compare bandpass, sealed and vented frequency output graphs

for a subwoofer in one program.

Solving for minimum port vent diameter.

Inputs:

maximum air volume displaced by cone excursion (V_{d})

= 0

= 0

meter^3

tuning frequency (f_{b})

= 0

= 0

hertz

number of ports or vents (N_{p})

= 0

= 0

minimum vent port diameter (D_{min})

= NOT CALCULATED

Select to solve for a different unknown

efficiency bandwidth product

efficiency bandwidth product | |

speaker resonance frequency | |

speaker electrical Q |

box or enclosure volume

box or enclosure volume | |

speaker total Q at f_{s} | |

air volume with same acoustic compliance as the speaker suspension |

box or enclosure tuning frequency

box or enclosure tuning frequency | |

air volume with same acoustic compliance as the speaker suspension | |

box or enclosure volume | |

speaker resonance frequency |

box or enclosure tuning frequency

minus three decibel half power frequency | |

air volume with same acoustic compliance as the speaker suspension | |

box or enclosure volume | |

speaker resonance frequency |

peak sound pressure level

peak sound pressure level | |

speaker total Q at f_{s} | |

equivalent air compliance | |

box enclosure volume |

sound pressure level

sound pressure level | |

free air reference efficiency |

maximum air volume displaced by cone excursion

maximum air volume displaced by cone excursion | |

cone effective radiation area | |

cone peak linear displacement |

cone effective radiation area

cone effective radiation area | |

cone diameter plus one third of surround |

port or vent length

port or vent length | |

volume of enclosure or box | |

tuning frequency | |

end correction factor |

minimum port or vent diameter

minimum port or vent diameter | |

maximum air volume displaced by cone excursion | |

tuning frequency |

References - Books:

1) Dickason, Vance. 1991. The Loudspeaker Design Cookbook. Audio Amateur Press. 4th ed.

2) Steele, Brian. 2002. The Subwoofer DIY Page v1.1. http://www.diysubwoofers.org.

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