I have heard the Legacy Studio HD at AXPONA a couple years ago. I could not believe it was this speaker that was playing the music. Because there was a floor stander next to it and the music had the weight and scale that would suit the floor standers. So I was surprised when they told me that it was this small speaker they were playing. Of course I did the "confirm, but verify" and was it was indeed the small speaker. Another one like this was the Atohm GT speaker. Even smaller than this but had amazing bass and scale of a floor stander. I agree with your friend on the Legacy Studio HD.
Have not heard the specific ATC you mention and hence cannot comment.
Have not heard the specific ATC you mention and hence cannot comment.