Also interested in comparison (HRT Headstreamer especially). Anyone has compared them?

I guess I will return device. It is impossible to enjoy listening music with all that noise. Maybe HRT headstreamer? I have exchange the unit with another one. It is A LOT better, however HifiMan should inform people that this device ix EXTREMELY sensitive to GSM/RF noise. :(

Any news on noise on HM-101 ? I have send Hifiman question if there is something they can do with it.  Mine HM-101 is noisy when not playing music/movies on Beyerdynamic D880 Pro and Koss Porta Pro from Macbook Pro source (I use iTunes with BitPerfect addon and Audirvana Free both set up to...