I own many high quality headphone (Stax Lambda circa 1985, Stax SR303, AKG K1000, Sennheiser HD580, plus many other middle level phones) but I wanted a quality  headphone for my office that was close to the stax.  I needed something that was sealed so it would not disturb my colleagues.  I also really enjoy the Audio Technica sound (similar to stax "voicing" in many ways).  These fit my goal perfectly.     The sound quality is extremely good, but not up to the level of the Stax or K1000s.  But for the office and a 20,000円 pair of headphones I am...