Various Speaker and Woofer Port Calculators
Length of Port
Volume of Box
Tuning Frequency
End Correction Factor
Information about the End Correction Factor
More Information About Reflex Tubes & Ports ( ext. Link )
Calculate Length of Port (L)
(For fb use the resonant frequency of the woofer or driver (Fs).)
D
v
= Diameter of Vent
N
p
= Number of Port(s)
V
b
= Volume of Box
f
b
= Tuning Frequency
(For fb use the resonant frequency of the woofer or driver (Fs).)
k
= End Correction Factor
L
v
= Length of Vent
D
v
:
Centimeter
Foot
Inch
N
p
:
V
b
:
Liter
Meter^3
Centimeter^3
Foot^3
Inch^3
f
b
:
Hertz
1/Second
k
:
Normally
k
= 0.732
L
v
=
Centimeter ( cm / 2.54 = Inches )
Calculate Volume of Box (V)
D
v
= Diameter of Vent
N
p
= Number of Port(s)s
f
b
= Tuning Frequency
(For fb use the resonant frequency of the woofer or driver (Fs).)
L
v
= Length of Vent
k
= End Correction Factor
V
b
= Volume of Box
D
v
:
Centimeter
Meter
Foot
Inch
N
p
:
f
b
:
Hertz
1/Second
L
v
:
Centimeter
Meter
Foot
Inch
k
:
Normally
k
= 0.732
V
b
=
Liter
Calculate Tuning Frequency (F)
D
v
= Diameter of Port
N
p
= Number of Port(s)
V
b
= Volume of Box
L
v
= Length of Vent>
k
= End Correction Factor
f
b
= Tuning Frequency
(For fb use the resonant frequency of the woofer or driver (Fs).)
D
v
:
Centimeter
Meter
Foot
Inch
N
p
:
V
b
:
Liter
Centimeter^3
Foot^3
Inch^3
L
v
:
Centimeter
Foot
Inch
k
:
Normally
k
= 0.732
f
b
=
Hertz
Calculate End Correction Factor (k)
D
v
= Diameter of Port
N
p
= Number of Port(s)
V
b
= Volume of Box
f
b
= Tuning Frequency
(For fb use the resonant frequency of the woofer or driver (Fs).)
L
v
= Length of Vent
k
= End Correction Factor
D
v
:
Centimeter
Meter
Foot
Inch
N
p
:
V
b
:
Liter
Meter^3
Centimeter^3
Foot^3
Inch^3
f
b
:
Hertz
1/Second
L
v
:
Centimeter
Foot
Inch
k
:
Normally
k = 0.732
Port end correction is a minor distance applied or added to the actual length of a resonance pipe or port, in order to calculate the precise resonant frequency of the port. in general 0.732 is used for k
Normally, k = 0.732 is assumed
**To be perfectly honest, I used code from ml-audio.nl to build ythis page, it was copied and modified to suit my needs. When looking for a Port calculator recently, I found that they were few in number, one I liked was simply gone, so in order to help other people I added it to our website. it is for anyone to use with their projects.