I have had this (along with the hd565, hd545, hd535, hd525, hd580, and hd600). These sound very different probably due to the closed design. They were easier to driver, had very nice bass but nice range extending into the treble. Actually one of the best closed back headphones I have owned, and easily the best Sennheiser closed headphone i have heard. I regret selling mine and still hope to find another at a good price!