Yeah, I played around with that for a bit a couple of weeks ago, and wanting to get some measurements before I built my new bass traps.
It's pretty sobering when you see that bigger room dimensions alone don't really help much...until you start getting out to 30' lengths and 12' ceilings or more...and even then, you're still gonna need treatment.
So I've been messing around with my new mega-bass traps the last few days...actually doing some position test measurements tonight, as I would like to get some working setup so I can get back to mixing...
...and if you just go by "visual logic"...like, "I think the traps should go here and there"...it doesn't really end up always working out the best.
I mean...the traps-in-corner is always going to help a lot...but like tonight just for shits-n-giggles I'm trying a single trap, on each side of my monitors...like real close, maybe only about a foot away....and it's sucking up some low-end nulls like a baby diaper!
Kinda like this: |\
Imagine that's the left speaker..and the angled line is the angled speaker...and the straight line is the trap. I have it at the same height as the speaker, and then going 4' right up to the ceiling. I was surprised at how much it improved the low/mid response.
Now I'm going to place the other traps at the back wall/corners...and see how the whole thing works.
Originally I was trying the mega-bass traps just at the back wall end of the room...but I think I will use two of them on the speaker sides, and the other four in a the back.