I too heard these amplifiers at the Tampa show. When I entered the goldnote room I sat down in the sweetspot listened for a song a guy requested a few songs they didn't have and offered to let him hookup bluetooth. He did and we listened to 4 different songs then he had to leave. At the same time a different guy asked what the atmashere on the floor were? I never even saw them. The rep said they were the new class d amps and that's what we listened too. I asked how much they were. It shocked me because all of the class d I have heard I didn't like. ( I heard the agd twice at that show much the music wasn't in the the wheelhouse for me to make a determination of positive or negative. I stand neutral) it's the first atma-sphere product I have heard. I really liked the sound because I couldn't tell that it was a class d amp. I ended up ordering one. Up until that day I never believed that class d had arrived. I a have heard most of the major modules and a few smaller companies class d and although better than 20 years ago not good enough. My brother, for years has been telling me that class d was the way to go. But my ears hear the higher order distortions that I just don't like. It's the issue I have with all of the solid state amps I have owned. Although I don't have tubes I have heard many and prefer the sound of the dominant 2nd and 3rd order harmonics. This class d fooled me. Hopefully what I initially heard will remain true when I get it in my system. My advice is if you get a chance to hear one you should even if you are not a fan of class d.