Sennheiser HD 660 S Headphones
The Sennheiser HD 660 S High-Resolution Audiophile Headphones surpasses the exceptional performance of its predecessor and you can get a pair for $299.95 shipped, today only, originally $499.95. Featuring a new and improved transducer design that delivers lower harmonic distortion for an even more natural, lifelike audio experience. Product page.

SENNHEISER HD 660 S - HiRes Audiophile Open Back Headphone
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SENNHEISER HD 660 S - HiRes Audiophile Open Back Headphone
  • 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...
  • 150 ohm nominal impedance allows direct connection to home and mobile Hires audio devices. Contact pressure: 6.0 N - 1 N

Plus, it performs well with a wide range of audio sources and thanks to the headphones’ lower impedance of 150 ohms, you’ll be able to use them with both HiRes mobile players or when directly connected to stationary HiFi components. To achieve their full acoustic potential, you’ll want to connect the HD 660 S to the balanced outputs of a dedicated headphone amplifier. Or, you could just pick up a pair of solar-powered headphones.

What you hear each and every time is the result of an open-back earcup mated to a new transducer tuned for the modern audiophile. Its speedy response is perfectly suited for reproducing those frequency-stretching recordings with confidence. Thanks to an aluminum voice coil, the 38mm diaphragm remains nimble for ultra-quick impulse fidelity across the board,” said the company.


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