Saraguie
Headphoneus Supremus
A little late to the party. I found this and interestingly it list an impedance of 3. Which for IEMs of 16 is still a bit too much.
http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&eotf=1&u=http%3A%2F%2Fwww.edelight.de%2Fi%2Fastell-und-kern-ak120-64gb-gapless-dual-dac-high-end-player-von-ingo&act=url
http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&eotf=1&u=http%3A%2F%2Fwww.edelight.de%2Fi%2Fastell-und-kern-ak120-64gb-gapless-dual-dac-high-end-player-von-ingo&act=url