This sounded really good at first but ended bad.

Imaging, bass separation and articulation become superbly phenomenal at loud listening volumes.

That's odd, I don't think it should charge off the Nokia.  The 6 has a separate charging switch.  I didn't have the Nokia when I had the 4.

Maybe he prefers low level volume listening? Though IME the UERM tends to open up a little bit at higher volumes as well.

Sounds like the Glacier is good, but wish the asking price were lower.

Update!

Thanks to my half-brother/father/BSDM partner Analixus

 Apex Glacier vs UHA6S mk2 (OPA209)

First, if you commute and wish to listen to music as you do so, then buy the glacier. the UHA is not usuable unless you love randomly hitting its giant volume knob. Even on a  desk or sitting beside me on a couch, I managed to hit the volume knob, it's a shitty design for a supposedly portable amp.

Also, the Glacier is twice as slim and doesn't scratch if you look at it. The UHA scratches by being placed in an atmosphere at sea level pressure. I avoided adding scratches to Analmort's UHA by swathing it a blanket of pure love for him (no safe word, that would scratch it).

Second, it seems Analmort used the Glacier at its lowest gain and the UHA at high gain. I have to say, I found the channel imbalance the UHA has with its analogue volume pot really annoying at any volume less than deafening. With iems, at least, it's a real problem even at low gain. The glacier has 3 gain levels and it's a lot better for iems use with its digital volume you can actually listen to it at whatever volume you like with both ears. Then again, I'm definitely going for moderate listening levels, mid-high 80s dB.

Okay, sound: Yes, the UHA is clearer in the mids. The Glacier is clear, but Pete Millett intentionally added a very little analogue/tube sound. It's actually a nice effect for me but not for everyone as it adds a small amount of warmth and smooths out the overall sound at the expense of that last full measure of devotion to detail.

Meanwhile, the UHA loses clarity in the bass with added bloom and the treble has a sharper, fatiguing quality to it compared to the glacier. I mostly can confirm what Analixus hears, just that he had the glacier on low gain, probably.

I haven't had a chance to really listen to the dacs, I think consumer-fi has some comparisons.

Overall, I can see people liking the UHA if it stays in one place (don't touch it!), but the glacier is actually very usable for commuting and has a nice sound. Not sure the price difference is worth it unless you commute.