Speaker Design Calculator

Sealed Cabinet
Vented B4 Cabinet
Tuning Lv
New QTS with series R
Attenuation circuit
Zobel circuit
Crossover design






Sealed Cabinet
Vas Ltr Box Volume (Vb) Ltr.
fs Hz fc Hz
Qts You may change Vb and fb to calculate a new frequency response.
Qtc
 

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Vented B4 Cabinet
Vas Ltr Box Volume (Vb) Ltr
fs Hz Tuning frequency (fb) Hz
Qts f-3 Hz
Port cm2 Vent Diameter (Dv) cm
  Ql
  Peak
  Vent Length (Lv) cm
You may change Vb and fb to calculate a new frequency response.
 
   


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Tuning Lv
Lv now cm
fb you want Hz
fb measured Hz
Lv cm
new length Lv is cm
 



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New Qts with series inductor

Driver Qes = Driver Qms =
Driver Re = Ohm Inductor DC R = Ohm
  orginal Qts
new Qts =
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Attenuation Circuit

Driver Impedance = Ohms R1 = Ohms
Desired Attenuation = dB R2 = Ohms
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Impedance Equalization Circuit
 A "Zobel" circuit can correct the rising impedance of a speaker present in the upper frequency range. 

 
Re = Ohms R = Ohms
Le = mH C = uf


 

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Crossover Design

First Order (-6db per octave) Two Way Networks

Butterworth
Tweeter
Impedance Ohms 		C1 = uF
Woofer
Impedance Ohms		 L1 = mH
Frequency Hertz


Second Order (-12db per octave) Networks Two Way Networks

Butterworth Linkwitz-Riley Bessel
Tweeter
Impedance Ohms 		C1 = uF
L1 = mH
Woofer
Impedance Ohms		 L2 = mH
C2 = uF
Frequency Hertz



Third Order (-18db per octave) Two Way Networks

Butterworth
Tweeter
Impedance Ohms 		C1 = uF
C2 = uF
L1 = mH
Woofer
Impedance Ohms		 L2 = mH
L3 = mH
C3 = uF
Frequency Hertz



Fourth Order (-24db per octave) Two Way Networks

Linkwitz-Riley
Tweeter
Impedance Ohms 		C1 = uF
C2 = uF
L1 = mH
L2 = mH
Woofer
Impedance Ohms		 L3 = mH
L4 = mH
C3 = uF
C4 = uF
Frequency Hertz





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