I sold my UE900, unfortunately they didn't live up to sound quality level I find satisfactory, I was struggling to enjoy them and think they're decent with certain genres, namely ambient albums, they fair well with electronic music providing you lift the volume quite high but throwing something like Diana Krall - "Frim Fram Sauce" and ahcieving imo quite underwhelming detail and performance was the decider on them leaving my house a few nights ago. By all means this isn't trying to stir anyone up, simply log the end of my UE900 journey.
I will stick with Fidue A83 or Altone200 (plus others for now)
As a contribution to my UE900 ownership I will leave you all this song.
https://www.youtube.com/watch?v=mZwecCPkUOM&list=RDmZwecCPkUOM#t=21