Sealed equations Vb = Vas / [(Qtc/Qts)^2-1] Fsb = (Qtc x Fs) / Qts F3 = Fsb if qtc .707
Ported equations Vb = qts^2.87 x 15 x Vas F3 = qts^ -1.4 x .26 x fs Fb (tuning) = qts^ -.9 x 0.42 x fs A = 1.463 x 10^7 x R^2 B = Fb^2 x Vb (volume in cube inches) Lv = (A / B) - 1.463 x R R = radius of port
I'm pretty sure they are listed here http://www.diysubwoofers.org/sld/sealed1.htm and http://www.diysubwoofers.org/prt/ported1.htm
I find it best to put them into ecxel..... Then double check your math (program) with online box calculators..........
