@gyx11 thanks for your great & informative (almost close to a review) 2 posts above
The way you described the soundsignature matches how I remember it, from when I heard it last month.
Although I hardly listen to accoustic and classical, I also really enjoyed it with lots of other genres. Can't remember the
''struggle with the heavy and congested passages of a song where it loses bit of control, which becomes evident at higher volumes'' part though, but I don't think I have tested it at high volume (always listen at moderate volume to protect my hearing) either
Anyway, I was looking for an iem that would be a good addition to my Solar and hybrids and I'm still convinced that I've found it with the AR6.
Concerning the 1964 ADEL U10 comparison, I've read multiple very positive posts about that one (and U12), so when the AR6 can hold up to it, then it's already very impressive imo. I had the 1964 Ears V6-Stage (also 6x BA, sold it some months ago) and althought that one had more bass in the signature as well, I don't think it performed on the same high level as the AR6 concerning resolution, details, imaging, soundstage etc.
Btw, I listened mainly from my Cowon P1 and FiiO X5 / Headstage Arrow 5P stack, loved the AR6's sq and signature from both! The cable that I used was a 8 braid silver one (Rhapsodio Luna), which also delivers pretty good bass for a silver one.