I use these headphones for 3 weeks. I bought it to replace an old Sennheiser HD560 ovation 2, which is 14. I thoroughly test my headphones prampli "project" on my home stereo high-end, and on my computer. the sound of me terribly. The bass is invasive, it is more of a hum in the background, there is no extreme acute, the instruments are not spars each other, the dynamics is very s limit, the stamps are not instruments at all ... Fidler I did not find any quality in terms of sound reproduction, a point that I think those who have apprcient cost another headphone as mine. However, comfort is good trs. It does not isolate outside noise. I bought 49 including shipping on the net. I am very sorry about my purchase.