**Subwoofer Box Comparison Calculator:**

Compare bandpass, sealed and vented frequency output graphs

for a subwoofer in one program.

Solving for sealed rear chamber Q.

note:

for S=0.7 | use | b=0.7206 |

for S=0.6 | use | b=0.9560 |

for S=0.5 | use | b=1.2712 |

Inputs:

passband ripple (S)

= 0

= 0

sensitivity gain (P_{a})

= 0

= 0

decibel

sealed rear chamber Q (Q_{bp})

= NOT CALCULATED

Select to solve for a different unknown

Fourth Order Bandpass

sealed rear chamber Qsealed rear chamber Q | |

passband ripple | |

sensitivity gain |

low frequency f

low frequency f_{3} rolloff | |

speaker resonance frequency | |

speaker total Q |

high frequency f

high frequency f_{3} rolloff | |

low frequency f_{3} rolloff | |

speaker resonance frequency | |

speaker total Q |

front chamber port tuning frequency

front chamber port tuning frequency | |

sealed rear chamber Q | |

speaker resonance frequency | |

speaker total Q |

ported front chamber net volume

ported front chamber net volume | |

overall bandwidth | |

speaker total Q | |

equivalent air compliance |

sealed rear chamber net volume

sealed rear chamber net volume | |

equivalent air compliance | |

sealed rear chamber Q | |

speaker total Q |

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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