LOL. There's nothing "closed in" about the sound of the DAS-R1 (using the 1541s you describe), either!
With respect, Neal, I'm not really interested in what can be 'measured', simply because measurement apparatus is often not compatible with what's considered as natural (or 'accurate') when processed through the auditory complexities of the human ear (and the brain's interpretation of it).
Basically, things aren't that simple because we (as 'complicated' humans) don't always hear music in the way an oscilloscope measures sound, which makes one question how relevant some scientific measurements actually are in hi-fi applications.
With hi-fi systems, too, the sum of its constituent parts is always greater and of more relevance than the individual effect of each component. However, that aside, I stand by my comments earlier in reference to your "slightly rolled off/closed in" remarks regarding the 1541A:
That's what my ears and experience tell me, not an oscilloscope
Marco.