4th Order Bandpass Subwoofer Box Equations Formulas Design Calculator

Low Frequency Enclosures - Car Audio - Home Theater Sound System

Subwoofer Box Comparison Calculator:
Compare bandpass, sealed and vented frequency output graphs
for a subwoofer in one program.


Solving for cone effective radiation area.

cone effective radiation area


Inputs:
cone diameter plus one third of surround (D)


Conversions:

cone diameter plus one third of surround (D)
= 0
= 0
meter


Solution:

cone effective radiation area (Sd)
= NOT CALCULATED


Other Units:



Change Equation
Select to solve for a different unknown
Fourth Order Bandpass
sealed rear chamber Q
vented or rear bandpass chamber Qsealed rear chamber Q
passband ripplepassband ripple
sensitivity gainsensitivity gain

low frequency f3 rolloff
low frequency f3 rollofflow frequency f3 rolloff
speaker resonance frequencyspeaker resonance frequency
speaker total Qspeaker total Q

high frequency f3 rolloff
high frequency f3 rolloffhigh frequency f3 rolloff
low frequency f3 rollofflow frequency f3 rolloff
speaker resonance frequencyspeaker resonance frequency
speaker total Qspeaker total Q

front chamber port tuning frequency
front chamber port tuning frequency front chamber port tuning frequency
sealed rear chamber Qsealed rear chamber Q
speaker resonance frequencyspeaker resonance frequency
speaker total Qspeaker total Q

ported front chamber net volume
ported front chamber net volume ported front chamber net volume
overall bandwidthoverall bandwidth
speaker total Qspeaker total Q
equivalent air complianceequivalent air compliance

sealed rear chamber net volume
sealed rear chamber net volume sealed rear chamber net volume
equivalent air complianceequivalent air compliance
sealed rear chamber Qsealed rear chamber Q
speaker total Qspeaker total Q

maximum air volume displaced by cone excursion
maximum air volume displaced by cone excursionmaximum air volume displaced by cone excursion
cone effective radiation areacone effective radiation area
cone peak linear displacementcone peak linear displacement

cone effective radiation area
cone effective radiation areacone effective radiation area
cone diameter plus one third of surroundcone diameter plus one third of surround

port or vent length
port or vent lengthport or vent length
volume of enclosure or boxvolume of enclosure or box
tuning frequencytuning frequency
end correction factorend correction factor

minimum port or vent diameter
minimum port or vent diameterminimum port or vent diameter
maximum air volume displaced maximum air volume displaced
by cone excursion
tuning frequencytuning 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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