The first looks like a list of the RPG product line, but at page 57 they show their modex corners with skyline everywhere else, iRoom.
The latter is the more interesting of the two, with a pass through diffuser with a broadband absorber behind it, used everywhere.
Jonathan DA wrote:
My totally unqualified opinion is that as you add more speakers to more surfaces, you reach a point where you want a consistent behavior throughout the room. D'Antonio (of RPG fame) coined the term Ambechoic to describe a room that uses massive diffusion to create an almost-instant 30dB drop in the ambient sound field vs. the direct sound reaching your ears. It would seem that this would be an ideal environment for virtually any surround sound speaker arrangement. You can see his presentation slides about it here: http://www.rpginc.com/docs%5CTechnology ... Design.pdf
As you can see from the Blackbird Studio example in the document, achieving an ambechoic room requires a crazy amount of space and money. The iRoom design in the document might be a decent approximation (I've never heard one, wouldn't know for sure). Another approach to achieve similar results is the MyRoom design method that Bogic Petrovic and Zorica Davidovic developed. It achieves similar goals to the Ambechoic design, but uses less space and is considerably cheaper. http://www.myroom-acoustics.com/hosted/ ... _paper.pdf