Sennheiser hd 660 s $360.2 @ Amazon

About this item

Reference class open back, dynamic headphone employing new and improved transducers delivering low harmonic distortion
Transducers are hand selected for precise (1 dB) left / right matching tolerance insure exceptional accuracy and presentation of stereo spatial characteristics
150 ohm nominal impedance allows direct connection to home and mobile Hires audio devices. Contact pressure: 6.0 N - 1 N
Para aramid reinforced, detachable cables employ high conductive OFC copper to insure signal integrity with very low handling noise
Supplied with two connection cables: One with a 6.35 millimeter stereo plug, the other a 4.4 millimeter Pentaconn balanced stereo plug. Also included is a 6.35 millimeter to 3.5 millimeter adaptor. Connectivity Technology: Wired 6.35 millimeter / 4.4 millimeter Pentaconn
Frequency response 10 to 41,000 Hz ( 10 dB), Impedance 150 ohm

$360