Meanwhile Pono Reveals PonoRevealer
https://www.ponomusic.com/ccrz__CCPage?oId=a201500000BtIph&pageKey=product&type=Update
Meanwhile testing reveals, all is not what it would seem
Fig.3 Pono PonoPlayer, frequency response at –12dBFS into 100k ohms with data sampled at: 44.1kHz (left channel cyan, right magenta), 96kHz (left green, right gray), 192kHz (left blue, right red) (0.5dB/vertical div.).
http://www.stereophile.com/content/pono-ponoplayer-portable-music-player-measurements