The humble personal music player has seen many iterations over the last few decades. That doesn't mean that people aren't still giving the area some love, and HiFiMAN is definitely flying the flag with its HM-901 Reference Music Player. The unit incorporates dual Saber ES9018 32-bit DAC chips, with upsampling 20 24-bit / 96kHz. It claims to be able to play most lossless audio formats, including Apple lossless. Of course, it'll still play your regular MP3s too, should you so desire. One neat trick is a removable amplifier card which means -- at a future date -- you could be able to swap them out for other amp cards that bestow a different sound, much like different guitar amps etc. Other forthcoming features include gapless playback, and the ability to use it as a WiFi music server. If you want some hard numbers, then HiFiMAN states that the distortion is less than 0.003 percent, with a signal to noise ratio of 107dB. Want to know the stereo cross talk? That'd be 86 db (line) and 76 db (headphone). Head past the break for our impressions.