I don't have my DAVE yet, but I've auditioned one, twice, before purchasing. Have you auditioned one with your headphones plugged right into the DAVE?
I'm a solid state kind of guy, and I have my favorite headphone amp: the SPL Auditor. I've tried many, many HP amps, but I keep coming back to the Auditor. It is hands down the best solid state amp I have ever heard.
Then I auditioned the DAVE and plugged right into the headphone jack with my HD800s. I was amazed at how wide and deep the sound was, having my single-ended HD800s, sound as if I were running my cans with balanced 3-pin XLRs. The effect was simply stunning. I have read, somewhere in these 299 pgs, that the way the headphone section is implemented in the DAVE is very sophisticated, unlike any other headphone amp, which will actually optimize the DAVE to the fullest. No digital glare that I heard...in fact, quite the opposite.
Maybe somebody in here knows a bit more about what I was reading about DAVE's headphone output?
Anyway, when I wanted to see how the DAVE sounded with my Auditor, after listening to the DAVE alone, I found the sound coming through my Auditor to be very odd. Not quite "flat," but not near as lively and realistic as it was plugging right into the DAVE. Now, this is an HP amp that I have auditioned scores of DACs with, to great effect The Auditor usually brings out the best in a DAC, from a strict solid state standpoint. Not so with the DAVE, though. I wonder why that is? It's not a rhetorical question. No, I really wonder why that is.
I have not heard the headphone section on the Hugo TT, so I wouldn't know...but I thought the headphone section in the Hugo sounded a bit pinched, when it came to what I was used to with the Auditor.
Just my experience. Take it with a grain of salt.