Thats very disappointing i'd like to try it in stores with equally power hungry headphones i might go this week and see how they perform. if they dont perform well, i'll look elsewhere.In that case I don't think you'll be happy with their SE performance. It was about as powerful as the N5ii which does 150mw/32 ohms
Power outputs with no load are next to useless as they can look very high but are only quite weak under load.