The PX100's had a very open mid-range and tight bass, but in our previous review we criticised its lack of treble sparkle. Well, Sennheiser has gone back and tweaked the formula, but the reticent treble remains. If we're generous we'll say that the sound is "tighter" overall, with a solid bass response and reigned-in mids. If we were truthful we'd say that the company has pumped up the bass at the expense of mid-range detail.
Do not take this to mean that the PX 100-II sounds bad because it doesn't. In fact it now sounds very similar to thebut in an open design.
Rock sounds best, and the set's ability to reign in mid-range hash means that the early Hives track A.K.A.I.D.I.O.T. was the most cohesive we've ever heard it. Bass drums were propulsive and vocals tight while cymbals bordered on sweet.
Yes, the Sennheiser PX100s were better, but the good thing is that they're still available in the short term. We'd go for them if given a choice, but if you're looking for a very sexy pair of over-ear cans that fold easily into your bag then the mark IIs are a very good option.