I will say that the Aegis TC amp that
@L0rdGwyn designed and built is quite mid centric, to the point that with the Atrium it got to be almost too forward sounding with the rest of my gear. On the Cayin the mids were not quite as forward sounding.
I did all of my ZMF A/B on the Aegis, whereas I used the Cayin IHA6 to A/B the Caldera va. Susvara. The Aegis can drive the Susvara but it gave the Susvara too big of a stage and too much air for my tastes. I didn't think that there was such a thing as too big of stage or too much air, or mids that were too forward, but I did find my personal limits on the Aegis.
The Aegis review will be coming soon, possibly next week, and I will post that in the ZMF amp thread.