thought i'd do an update after a few days of fullon cookin thru a clip+ at max level using edm. came home 1/2hr ago & plug it in for a listen & .........WOWWWW! its like the skies brightened up after a dark thunderstorm! while the initial impression was the px100II's a tad dark & not as opened up top, that's now changed. treble's detailed &sparkly while soundstage has opened up even more. to my ears, it is in no way dark or warm or syrupy.
a quick AB with the philips X2 still shows the X2 having the upper hand with a deeper tighter meatier bottom & an ever so slight extended refined upper treble but thats it! right now, the unimposing px100II is like the X2's little brother but no so little that its blown away.
anyone serious about portable sound should pick up a pair of these px100II. much as its older & much more expensive sibling the HD600 has been THE REFERENCE for open headphones, its my opinion that the humble px100II is THE REFERENCE for portable open headphones. at the price i paid (or even at its regular $60 or so) its not just a bargain but a gift.
the op's opinion of calling these a hd625 isnt not just not far out but closer to factual than i'd like to admit. & i did pick up another pair but i think i mite even pick up the last pair if its still there! dont mean to be a hoarder but these px100II's are that good!
ignore these px100II at your own peril. fwiw im not affilated to sennheiser the company in any way shape or form. if i was, i'd peddle their more expensive stuff