OMG! Just listened to this DAC, and it is AMAZING! I'm listening to it on Hifiman HE-400's (modified) and comparing the M8 to a Cambridge Audio Azur 840C reference player/DAC, MSB 24/96 Link III DAC, and Emotiva XDR-2 DAC, and the ifi nano DSD. (I also own other headphones, like the Sennheiser HD600s, but mainly use the modified Hifiman for critical listening.) I'm using the ifi iCAN as a headphone amp, but also the Little Dot III tube amp...