First tried Ambio setup in Spring 2011. To test the method, I did an a/b comparison where
a: speakers at 2,5m equilateral triangle ie 60 degrees
b: speakers dead ahead at 10 degrees.
Played 2-3 tracks from about a dozen CD's, all types of music, took me a day to listen to 3 tracks*12 CDs *2 times the speaker setup. And, to help my receding memory, I was quick to change between speaker positions. To be able to verify, I took notes on listening impressions of what instruments where listenable at what position in the room: I drew the room and speakers on a notepad, then made marks of what/where I listened to ie the doublebass, or an accordeon, or a tuba etc.
For Ambio, I used a 6" thick barrier made with sheets of pyramid foam, no algorithms for me.
Results were Ambio beat stereo every time. In stereo, instruments were close together depthwise though nicely spread left to right. In Ambio, instruments were much further apart front to back, and a bit further apart left to right. On a few occasions, with Ambio I listened to instruments that with stereo I could not tell were there. Springsteen sounded articulate rather than mumbling lyrics away (which is no small feat
At first I did not achieve 180 soundstage with ambio, but would easily go 90-100 degrees. Still, even with the barrier ~2' away from me, on Craig Armstrong's "The space between us" at the beggining of Track 7, I heard a cricket at 9 o'clock. I later found out that soundstage limited (!) to 100degrees was due to my using a short barrier. Once I moved closer to the barrier the sound did extend close to 180 degrees wide.
Bass was extended lower, which made my bass-shy speakers more pleasant to listen to.
Sheer palpability of instruments was breathtaking. On Dark Side, I could count the number of clocks going off at various depth levels. They started at speaker level and were spread back to more that 10', and I was smiling: hey there's one, wait, there's another one, woa that's the big floor clock way back to the left...
Only problem I have is that using pyramid foam with speakers close together is killing the high frequencies for me. I have planned to try a thinner reflective barrier in place of the absorbtive one I now use. Need some time and tools to cut a few plywood sheets to make one.
But, now that I have tried Ambio it will be impossible for me to go back to stereo.
All I can say to all you music lovers out there is GO AMBIO, you'll love it!
Hats off for Mr.Glasgal