I used it for years. The medium is superb and well ahead and promote the monitoring of voice, "sound objects" and moods. Useful for music to put our heads in the medium and analyze its decision or its mix, but not for mastering. Today is the DT 48 E. The first version dates from 1937. The headphone is "pro" sound engineer for radio and film, none. Very closed, very tight head and ends up being very tiring, but nothing escapes the medium.