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Closed Sealed 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 free efficiency bandwidth product.

efficiency bandwidth product


Inputs:
speaker resonance frequency (fs)
speaker electrical Q (Qes)



Conversions:

speaker resonance frequency (fs)
=0
=0
hertz
speaker electrical Q (Qes)
=0
=0


Solution:

efficiency bandwidth product (EBP)
=NOT CALCULATED 


Other Units:



Change Equation
Select an equation to solve for a different unknown

constant
constant constant
speaker system total Q at fc speaker system total Q at fc
speaker total Q at fs speaker total Q at fs

efficiency bandwidth product
efficiency bandwidth product efficiency bandwidth product
speaker resonance frequency speaker resonance frequency
speaker electrical Q speaker electrical Q

system resonance frequency
system resonance frequency system resonance frequency
speaker system total Q at fc speaker system total Q at fc
speaker resonance frequency speaker resonance frequency
speaker total Q at fs speaker total Q at fs

minus three decibel half power frequency
minus three decibel half power frequency minus three decibel half power frequency
system resonance frequency system resonance frequency

net internal box volume
net box internal volume net box internal volume
air volume with same acoustic compliance as the speaker suspension air volume with same acoustic compliance
as the speaker suspension
constant constant

free air reference efficiency
free air reference efficiency free air reference efficiency
speaker resonance frequency speaker resonance frequency
air volume with same acoustic compliance air volume with same acoustic compliance
as the speaker suspension
speaker electrical Q speaker electrical Q

sound pressure level
sound pressure level sound pressure level
free air reference efficiency free air reference efficiency

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

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

K 1 constant
K1 constant K1 constant
air density air density
system resonance frequency system resonance frequency
maximum air volume displaced by cone excursion maximum air volume displaced by cone excursion
sound speed in air sound speed in air

K2 constant
K2 constant K2 constant
K1 constant K1 constant

Amax constant
Amax constant Amax constant

maximum displacement limited linear power output
maximum displacement limited linear power output maximum displacement limited linear power output
K1 constant K1 constant
Amax constant Amax constant

required electrical input to achieve Par
required electrical input to achieve Par required electrical input to achieve Par
maximum displacement limited linear power output maximum displacement limited linear power output
free air reference efficiency free air reference efficiency

peak sound pressure level
peak sound pressure level peak sound pressure level
maximum speaker power input maximum speaker power input


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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