HD800 info at the Senn siteNew ring radiator design driver (sort of a coil with two speaker surrounds attached to it, one on either side as the air driving surface, looks sort of like a dome driver with a hole in the middle)
Diffuse field eq'd 300Ω dynamic drivers
Frequency response 6 – 51,000 Hz (- 10 dB)
Frequency response 14 – 44,100 Hz (- 3 dB)
Factory measured response data for each unit available by entering the serial number on-line.