What a bummer! Such a great potential got lost by this restriction. I certainly would consider buying it if possible to use HiRes BT from a supporting laptop without extra or proprietary soft-/hardware and also from any other Android or iOS device, e.g., with Neutron Music Player. Up to date...

Ever tried to use your Shiits? If not getting loud enough or not satisfying for another reason, try(!) an Audio-GD NFB-29H or if you want/need it also balanced, NFB-28 (the current versions). They provide enough power. You could also have a look at the less expensive, pure headphone amplifiers...

Thank you for your reply!   Audio-GD seems to build some really interesting products. I hope I get the chance to listen to some of their DAC/Amps soon.   :)

hi there,   i will buy Philips Fidelio X1 headphones but i am not sure yet how to power them. i am looking for a (preferably warm sounding) USB-DAC incl. headphone amplifier and the possibility to attach (active) studio monitors (e.g., ELAC AM 180).   software will be windows 8.1 (x64) +...

hi there,   THX for the nice review and many good comments!   i will buy a X1 but i am not sure yet how to power it. i am looking for a (preferably warm sounding) USB-DAC incl. headphone amplifier and the possibility to attach (active) studio monitors (e.g., ELAC AM 180).   software will...