I don't know what was on AA, but the sound stage is huge and fills my whole house. I can sit to the side and still enjoy these speakers. The sweet spot is everywhere, not just one location like planer speakers, ect. Yes, there is one perfect spot, but it is not very noticable and took some work to actually locate it. The set up has a tilt to tip the speaker forward or back slightly and the difference is so small, it takes time to find it. I sit, lay down, sit somewhere else, or walk around and I always enjoy the Callisto. You really need to hear these. I enjoy the Callisto so much, I upgraded my equipment also. There is no set sweet spot that if you leave that spot you will not enjoy them. That is the beauty of the dual bottom ports. Music is everywhere and not really directional IMO. I wonder if the posts were meant to damage GMA since the posts could not be more wrong.
Give Roy a call at GMA and he will give you the technical on the Callisto. Also, send me an email and I can send you pdf. files of documents on the Callisto that Janet Lynn, the CEO of GMA sent me recently. Lots of information in these.