Sennheiser Consumer Audio HD 660 S – HiRes Audiophile Open Back Headphone

Amazon.com Price: $499.95 (as of 07/11/2023 18:31 PST- Details)

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