Hifiman edition s open or closed back on ear headphones hifiman a leading designermanufacturer of high performance headphones and portable audio products announced their first on ear headphone edition s for music lovers on the go the new affordably priced dynamic on ear model features a removable logo cap on the ear cup instantly transforming edition s into your choice of open or closed back headphone experts have long recognized the sonic benefits of an open back design while closed back h