copy/pasted from the post I made:
I'm no headphone expert, i'm still fairly new, but here are my impressions from my ZVM, 192 and 320kbps mp3s, no amp. I used m-flo's "miss you(R&Bish, borderline pop)," Yoshika's "Straight Ahead(R&B)," and Yui's "Merry Go Round(think Japanese Michelle Branch)." Sorry for the lack of english artists, my ZVM only has Japanese music at the moment.
Bass is amazing. Not boomy or uncontrolled, ALMOST but still not as bloated as the shures I tried(i think e4?). Vocals fell short IMO, especially compared to the ER-6i I was using at the time. There were still some good highs though, Yui's guitars were still pretty crisp, but it felt like her voice was too far from me. Same with Yoshika, and the song doesn't use as much production or processing, and heavily relies on her vocals. I bet the sound would have improved if they had an amp, or if I had brought my own. The design that they had for me to do demo, was different than the final product sketch he had shown me. The one I tried was kind of hard to fit in my ear. I think the price point he said was 380, with a possible 15-30 price drop for the um2 and um1. He also talked about the company possibly producing different IEMs similar to those two that are marketed at a consumer level for audiophiles instead of musicians(probably for DAPs), and said to keep any eye out for those since I showed interest in the other um2/1s.