Some more impressions...I have clocked quite a few hours now, sleep deprived but happy
M9 really has superb layering, it's richer articulate layers of nuances than any DAP I have heard.
This adds something special to imaging which is pretty great to begin with, it's like you have more spatial cues and more precise and minute.
It makes things more holographic in my opinion and richly textured too.
Also it makes listening to complex stuff much easier and less fatiguing.
This is part of the effortless nature of M9.
Another thing, micro dynamics and low level details are really special, this was something I loved about WM1Z when I owned it... I remember saying M8 was the spirit child of WM1Z on bass but M9 has this special quality of 1Z even further and with a more balanced midrange (and of course so much more amp power...).
This one is a keeper and strong contender among the top dogs for sure...
Ah and this DAP has a soul like no other... it's really stunning that way there is something highly engaging to M9