Summary: I expected to go into these headphones and be really impressed but honestly I think they sound pretty dreadful considering the price. I've tried pairs that are half (or less!) the price that sound infinitely better than these headphones. They're incredibly fatiguing, literally hurting my ears after 15 minutes of use and in general the sound is just poor across the spectrum - tinny highs, buried mids and boomy lows. They just sound muddled and boomy, not at all detailed.
Summary: I have owned many, many different headphones, headsets and ear phones of all qualities. I love Sennheiser generally and own 2 pairs of HD650s as well as 2 sennheiser headsets for PC, along with others i've owned in the past. They are all top notch. However a couple of years ago i bought the IE80's, for 180 from amazon new.