Ah, it took a while!
I connected it to a Schiit Jotunheim, a fairly inexpensive but relatively clean headamp, via balanced. It was.. clean, unsparing. I didn't notice much stereotypical delta sigma harshness, but it certainly sounded somewhat surgical. That's exactly what I'd want it to sound like, honestly- I have a Gungir multibit for when I went things to sound a little more.. forgiving.
I essentially, it sounds clean and pleasant. I don't think the built-in headamp is stellar, not enough grunt to really have "grip" on the drivers, especially on sluggards like old HD650s, but it's fine for casual monitoring. Via the various line outs, however, it gives an impression of precision. Whether that's to your taste for recreational listening would be an ecumenical matter 😉
Have you seen that new smol Dreadbox thing? It looks like fun:
..if you like modulation craziness, their Erebus V3 is a delight, I have one of those, and can't bear to part with it, even though I probably have too many synths. It sounds stunning, classic fat subtractive sound for such a small desktop synth. Very underrated and has a very nicely-appointed patch bay for all your weird modulation needs too.
Also, if you like weirder, have you seen the Make Noise 0-Coast?
Sorry for the massive video spam, but if you're in the mood for a fun smallish mono, those are potentially dangerous to your free time.