I have be professionally record for 15 year , and have own these since day 1 . I use these headphone both in the concert hall and in the studio . I recently buy a second pair , just so I have a spare for the day that my first pair die . I highly recommend these headphone for all you recoding and listen need . after 15 year of continual use , the only thing start to happen be that the cover over the foam be just now start to separate . but , I fully expect they to last another 15 year at least .