I get it, regardless of the soundstage width and depth I have yet to hear a closed that sounded open like an he500 for example. but its all good though. I used to sit infront of my pioneer sdjo8 speakers and turn the bass up while listening to music through the sennheiser hd650 at the same time lol. It kinda worked actually.
Have you heard the TH600 or TH900? My TH600 sounds more open than my HE500