##
Re: Need help with calculations from Ported box Sticky

Originally Posted by

**berserker**
Fi SSD12 used for reference.

Vd = Sd*Xmax

Vd = Sd (M^2) * Xmax (Meters)

Vd = 0.048 * 0.021

Vd = 0.001008

dV >/ 39.37*(Fb*Vd)^0.5

dV >/ 39.37 * (Fb*Vd)^0.5

dV >/ 39.37 * (35*0.001008)^0.5

dV >/ 39.37 * 1.878297101

dV >/ 7.394855687

dV >/ 7.39

A = Pi*R^2

A = Pi * R^2

A = 3.142 * 3.695^2

A = 42.89870455

A = 42.90

And you end up with 42.90 In^2 minimum vent area with tuning of 35 Hz.

Where did you get 3.695 from?

Refs:

Patfitz9,Farkel,PowerNAudio,Qtrhorse,theCybe,Kicke R_TauruS,SWEET06CAMRY, mike dressure,vernisog, Racerx250, iceteebonee

## Bookmarks