OK, lets cut to the chase ...
the Pass 250 is like .... the TOTL, top of the line ...
to say it is thin is not accurate, and If so, I would look to your other components, b/c the Pass is not to blame.
I just heard the Pass 250 in 2-3 rooms at CAS last month, and it sounded like the cleanest, most accurate, most musical and intimate sound even with the Dynaudio Contour 60s. I say this b/c the Contours dont produce the type of distortion that lends to a gravity or "fullness" of the music like a tube amp does. And therefore, even without hamonic distortions, the Pass 250 sounded real, present, natural and effortless.