Pi versus T-S


hello guys! i have some doubts, and i think you can help me. i have just finished the design of my new speakers (by the T-S theory). i visit this site nearly every day, and is difficult not to get interested in the Pi aligment theory. so, i would like to know, which are the advanteges of Pi over T-S, and vice versa.
i will be using the selenium wpu1205 (12") woofer, paired with the d405ti driver on a hl1450 horn, all selenium. the box is designed to have a smooth response up to 55hz (f3 point), at 40L. i would like to know how big would be the box using Pi theory. all i want is a powerful bass, not too much extention.
this is the woofer data:

sensivity= 95dB
Fs= 46Hz
Vas= 57L
Qts= 0.33
Qes= 0.34
Qms= 11.92
Re= 6.7ohm
Le @1KHz= 1.324mH

thank you very much!

Pilkar




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