I really like the sound of this player because it sounds good with all the formats it supports.
-mp3 sound good and the DSEE HX mode makes it a very enjoyable listening experience
-redbook 16 bit 44.1 flac/wav playback is flawless and this is when you appreciate a good pair of cans. Sony has a suite of tweaking tools clear audio+, clear bass, equaliser, clear phase to tailor the sound to individual preference which works rather well
- 24 bit/88.1/96/198 flac is where the magic happens, all audio enhancement were switched off, sounded crystal, I tried the F-887 with the HD650,HD 700 and the HD 800 and with each the difference quite apparent , the possibilities of extracting every little detail is immense with a good amp/headphone combination. the ue900 worked pretty well with it , I would say its quite versatile as a source, and as a complete package.
Tried the ROM Toolbox to get it to boot in recovery mode but the app reported an error, did not investigate further.