is my math ok?

[XtrmAudioCncpts]

this is my first ported box hows my math

2.24472 feet^3 minus .18= 2.06472

13X2 port tuned to 28Hz = 40.440 inches long

is it right? or no

[XtrmAudioCncpts]

bump

http://www.soundsolutionsaudio.com/forum/index.php?showtopic=3091&st=0&p=73755&#entry73755

should i tune it higher than 28hz or stick with it?

[XtrmAudioCncpts]

so no one wants to check my math?

[Decipha]

i got 32.58" but i may be wrong

[Decipha]

WinISD gave me 36.25"

[Decipha]

your probably right cuz i didn't take into consideration the amount of volume the port will take up so yes your math should be ok if not it won't be an audible difference either way it will be about 28 hertz