Thanks a lot Collo. The advice really helped.
I followed your method for obtaining dimensions, but I altered my requirements a bit and came out with a good solution.
First off, let me say that I have 2'x4'x6" broadband absorbers. So, my plan is, since I want this in an 8'x6' area, I will just fill the bottom 2' with broadband absorbers and stand the diffusers on them (Only concern is how much these things weigh, but I'm definitely going with blueboard, so I doubt they weigh to much?)
The dimensions I came up with after this decision seemed to click perfectly. With a design frequency of 525 Hz, the specs are as follows:
Deepest Well:
12 inches
Number wells: 29
Frequencies Diffused: 262-6880 Hz
Well Width: .98 inches
Period width:
31.84 inches
Fin width: .11 inches - as long as I keep below this, I'll be fine with how close I come to my goal period width
Minimum distance to seating position: 154.96 inches (12.91 feet) - this actually sounds pretty close to perfect but I haven't measured yet - I bet I have it though
With this period width, I fit just barely under 8 feet. Perfect!
So, I've now got my dimensions down. Rap up my 3 finals tomorrow, another next Monday, then the fun starts.
If anyone, particularly Xenon, has any advice on my construction questions from my previous post, I'd love to hear from you. I'm particularly worried about cutting the thin fins as it will produce nasty edges as was talked about in another thread.
EDIT: I just realized that .98 inches is quite small compared to the height of 12 inches. Will this result in viscous losses? QRDude gave this value to me when I checked "Auto minimize well width".