Sennheiser HD 660S

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The HD 660 S Open-Back Dynamic Headphones from Sennheiser are headphones for the passionate audiophile and are crafted for the most demanding listener.

Built with a transducer design that delivers lower harmonic distortion, they provide a natural, lifelike audio experience and can be used to produce crisp bass, transparent mid-frequency response, and a natural treble when connected to high-res players or portable audio devices.
With an impedance of 150 Ohms and a frequency response of 10 Hz to 41 kHz, the HD 660 S headphones are equipped with a choice of cables that feature both balanced (4.4mm Pentaconn) and 1/4" connectors. A 1/4" to 1/8" adapter is also included. This allows you to enjoy reference-class, high-fidelity sound with stationary and mobile audio players alike.
  • Reference-Class, Dynamic Wired Headphones
  • For Stationary & Mobile High-Res Players
  • Very Low Harmonic Distortion
  • Tolerances for ±1 dB Accuracy
  • 10 Hz to 41 kHz Frequency Response
  • Detachable Para-Aramid Cables
  • Includes 1/4" to 1/8" Adapter Plug
  • 1/4" Stereo & 4.4mm Pentaconn Cables
  • Includes Storage Box

Product instruction

What's in the box?
  • Sennheiser HD 660S
  • Cable with 1/4" (6.35 mm) Plug
  • Cable with (4.4 mm) Pentaconn Plug, Balanced
  • 1/4" to 1/8" Adapter
  • Storage Box
Design Over-ear
Type Open
Frequency Range 9 - 45 000 Hz
Impedance 150 Ω
Headphones Foldable No
Weight 260 g