billy18bm

05-09-2007, 10:39 PM

ive used the

dV = is the required diameter of port in inches.

Fb = is the tunning frequency of the enclosure in hertz.

Vd = is the volume displaced by the driver (woofer)

Lv = is the LENGHT of port in inches.

R = is the internal radius of vent tube

Vb = is the internal volume of the enclosure cubic inches.

Lv = [(1.463*10^7R^2)/(Fb^2*Vb)] - 1.463

ive plugged everything in

my question is when u plug the Vb in do you plug the total w/ driver displacement and port displacement in or does the formula account for that.

Heres a pic of my design and my calculations. If anyone wants to take a shot at calculating my Fb.( i have it at 36hz).and net volume. Also, my driver displacement is .055*2 = .11

http://home.comcast.net/~tshot39/box.jpg

dV = is the required diameter of port in inches.

Fb = is the tunning frequency of the enclosure in hertz.

Vd = is the volume displaced by the driver (woofer)

Lv = is the LENGHT of port in inches.

R = is the internal radius of vent tube

Vb = is the internal volume of the enclosure cubic inches.

Lv = [(1.463*10^7R^2)/(Fb^2*Vb)] - 1.463

ive plugged everything in

my question is when u plug the Vb in do you plug the total w/ driver displacement and port displacement in or does the formula account for that.

Heres a pic of my design and my calculations. If anyone wants to take a shot at calculating my Fb.( i have it at 36hz).and net volume. Also, my driver displacement is .055*2 = .11

http://home.comcast.net/~tshot39/box.jpg