What's the size of your listening room and/or ht?

You may find it interesting to check out Martin Logan's website. They have a section that describes the construction of their reference listening room, in which they performed the final critical listening in the design of the Statement E2 system, as well as the Prodigy.

Clueless: This is an area that I disagree with Everest's reference and a number of other references regarding splaying walls. In fact, if you look at most of the literature in this area, most discuss parallel walls and how to do all the calculations from this. It is FAR more complicated to design, model, and engineer a room without parallel walls. The results are predictable (contrary to Everest--but I think he knows this), but the effort is pretty great. I think Everest is clearly very smart in this area not to discuss it because it makes all the math very complex. Instead of using simple algebraic equations you have to do everything with integers and differential equations--it gets pretty ugly pretty fast. There's no way he could cover it satisfactorily in his book. It really just about requires a book unto itself. It doesn't make sense to do it in small environments, but when you get into larger environments that support longer wavelengths it is very beneficial in the bass region by reducing (or virtually eliminating) room modes when designed correctly. There's a lot more too it, such as designing the angles to reduce slap echo and even minimize the amount of diffusors used (they are almost always still needed to some degree). I know I haven't fully answered your question, but I think my fingers would wear out before I could really answer the question completely. I'd be glad to discuss it sometime and try to take some of the mystery out of it.

Rives, I've always enjoyed and respected your threads. Perhaps you could share the exact dimensions/proportions of your project?

My room is 15DX25WX8H, and it is fabulous. I got lucky.
When I ploted the graph recommended by Robert Harley in his book; it was obvious why, there are almost no reinforcements of any of the frequencies from 20-20K. Also since my speakers have the woofers far apart, they are quit immune to many of the room/bass problems.

Still, I would love a bigger room. But, I live in SanFrancisco with one of the highest real estate prices in the country; so I'm realistic and happy with what I can afford.

Richard

Unsound: I will when I finish the project. In fact I met with the architect today. I now have the basic boundaries of the room figured out, but do not have the exact measurments done. I have at least 2 more weeks of work (and probably longer--because I don't have enough time to do all the modelling and equations right now). My room is still not going to be perfect, because there are some constraints in terms of how it fits into the rest of the house, but it should work out very well. I expect when the project is complete (or at least the designs), I'll put it up on the rivesaudio website.