Astell and Kern AK100 Personal MQS & Ultimate Portable Hi-fi Music Player
Trevor Stephens, Advance MP3 players
7 November 2013
Summary: The AK100 is a beautiful little device with a superb sound quality when it is pqired with the right iem's. This is because the device is a 32 ohm device. There are other devices out there that are much less picky about what headphones they are driving.
I have westone 4r iem's they lose their bass performance on this unit.
I bought a set of Sennheiser ie800 iems specifically for the AK100 and the combination is very very good.