http://www.whathifi.com/awards/2013/dacs
http://www.stuff.tv/features/5-best-dacs-how-make-your-digital-music-sound-amazing/chord-chordette-qutehd-ps1000
http://www.apartmenttherapy.com/high-resolution-technologies-microstreamer-usb-headphone-dac-tech-test-lab-review-189313