Posted by Observator on October 10, 2001 at 04:14:22

Hi Wayne,

I would ask you about port dimensions of Pi Align
model: back to my PiAfterburner Eminence Beta12LTA:
Fs=45,Qts=0.51,Vas=2,4548cuft,
PiAlign give me
Ve 2,454828132 cuft
Fre 33,08823529 Hz
Qe 1,388888889 -

to achieve exact Fre and Qe for this box, the optimal port
Diameter is 2.408" and Length is 2.515" (calculated in excel).

Use of a larger port cause rise of the Qe/Fre.

Using this port dimensions in other software (WinISD for example)
show me the red numbers for this port: 0,41 mach in Vent, that
means noise or Doppler distortion risk.

Have I to consider this risk or is it something different
for the Pi align approach ?

Thanks in advance,

O'Tor

• Re: min size of port - Wayne Parham 10:33:27 10/10/01 (0)