this be my first new pair of headphone in quite a few year . they be a replacement for a 25 year old pair of akg k-240 , my last pair of Sennheiser headphone be a pair of hd-414 which still work great after 30 year of use . I have always find they product in general to be very high quality . the sound quality with these be excellent listen to any type of music , excellent flat frequency response , good clean bass and very crisp high , and very comfortable .