Enclosure Calc Sites, like the RE one???

[smullen]

Are there any other sites that let you layout a enclosure and vents that show airspace and tunning like this one at RE

http://reaudio.com/speaker_box/LPort_Box_Calc.html

But show begger pic or that can show a bigger box???

Example, 48+ x 33 x 15 with about 4x31x port or about 141+ sq inces of port area...

I'm playing with enclosures for 4 12s, that I want to be tuned at (i'm guessing) around 36-37 hz... I want this for playing music, but to be as loud as possible...

[kl0wn]

Rockford site has one, ExpoSport made one, and there is a topic on here somewhere with a few box calc links to download, but there isn't really a reason to have a picture on them, since they tell you exactly how to cut the wood then all you have to do is cut it, and put it together