Thank you for your immediate response!

I will start asap. I would also ask you for some
technical details about Pi 40-1354 construction:

Entering T/S params to your PiAlign Soft:
Vad=0.459 cu ft, Qd = 2.174, and Frd = 56Hz
the PiAlign for BR cab propose:
Encl Vol = 0,211, Ideal Fr = 45.65, Ideal Q=2.21.

Next there is a Encl Fr=54.28 and Encl Q=2.16,
and Port Len = 0.82 and Port Area = 0.31

My question is: are those the final values
OR
I have to do iterate Len/Area combinations to
approach proposed ideal values ?

Thanks in advance,

O’tor