I tried the AK 120 II with my UERM IEMs and thought it sounded really great. It was a short audition, but to my ears the AK is clearly superior to the built-in amp in the iPhone 5 and maybe better than my Fostex HP-P1 (DAC/amp combo). I like the interface and the device is pretty small, but weighs more than an iPhone (perhaps double?). I got to briefly compare it to the AK 240. I heard no difference. I did not audition the AK 100 II.
9/1/14 at 5:07pm