SUEX is reportedly buggy, but I had no problems in my case. A bug will take a restart or a fresh re-flash in worst case. Here you go with the authors comment: http://www.head-fi.org/t/679473/the-ibasso-dx50-thread-latest-firmware-1-9-2/15825#post_11149759
After flashing ALWAYS reset the system and rescan the library with ANY firmware.
It has a warm-up effect for several minutes in Dmitry's words so mind that before critical listening and enjoy! My personal findings are that SUEX is more dynamic yet analogue and undistorted than any other FW. It has less sibilant treble and by far the best mids - it makes vocals very special(this is where audiophile differs from neutral/flat for me) the bass is very detailed and textured yet it is really hard hitting when present in the recording - the heaviest of any SU or original FW but with no slowish or distorted feeling . The minuses are that it delivers an intimate sound stage so if someone wants a lot of stage width/depth, a lot of layering, more presence or very energetic treble he must look elsewhere.
But how could I answer if I didn't have the orthos and the DX50 at the same time? The DX50 is ok with the HE400i at high gain and max volume but far from loud. May sound strange but on the DX50 high gain delivers worse sonics compared to mid gain (especially the treble) so this is already a reason for me to skip using the DX50 with hard to drive phones.
I compared the DX50 to both a telephone with a Wolfson dac(like the DX50) which most people already have in their pocket and a British design with supreme engeneering and a TI BB dac as a low and a high reference points.
Dmitry told me that only re-flash will fix broken libraries and restart doesn`t help. That`s why I didn`t keep using it. I had crash 2 times and after crash changing bootup menu settings didn`t work. Only re-flash helped. And if I remember correctly then during re-flash I also saw first time somekind blue-screened menu, I was littlebit scared that I bricked my unit but luckily DX50 is basically impossible to brick. RKBatchTool will always help
Dmitry told me that only re-flash will fix broken libraries and restart doesn`t help. That`s why I didn`t keep using it. I had crash 2 times and after crash changing bootup menu settings didn`t work. Only re-flash helped.
Yanec,Coil listerning to SUEX FIRMWARE for the last 3 hours on different cans and iems no stabiliy problems yet.
DX50 will probably play up now ive stated that.
Really like the base on this version.Will listern all day tomorrow to get a good feel for it.
When ever i do a Firmware change i play Dark Side Of The Moon to give me first impressions and i like what im hearing so far.
Thanks again fir your advice.