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Sennheiser HD 660 S Audiophile Headphones

Sennheiser’s new HD 660 S is the ideal open, dynamic headphone for the passionate audiophile. Meticulously crafted for most demanding listener, the HD 660 S builds on the legacy of the legendary HD 650, surpassing the exceptional performance of its predecessor with a new and improved transducer design that delivers lower harmonic distortion for an even more natural, lifelike audio experience. It is exceptionally accurate
and transparent, yet has an expressiveness that immerses you in every emotion and nuance of music. With a lower impedance of 150 ohms, and a wider choice of cables that includes both balanced (4.4 mm Pentaconn) and 6.35 mm connectors, the HD 660 S offers the versatility to enjoy reference class high fidelity sound with stationary and mobile players alike.

Reference class open dynamic wired headphones
New improved transducer design for very low harmonic distortion
Hand-selected headphone drivers with precise left and right matching tolerances (± 1 dB) for accuracy
150 ohms nominal impedance to allow direct connection to both stationary and mobile HiRes Players
Detachable cables made from highly conductive OFC copper, with very low handling noise and para-aramid reinforced
Includes a choice of connection cables with either 6.35 mm stereo plug or a 4.4 mm Pentaconn balanced stereo plug. A 6.35 mm to 3.5 mm adapter is also included
Frequency Response: 10 Hz – 41.000 Hz
Sound Pressure Level at 1 kHz, 1 Vrms: 104 dB
THD at 1 kHz, 100 dB: ? 0,04 %
Supplied with storage box
2-year warranty

Specifications

Transducer principle: Dynamic open
Frequency response: 10 – 41,000 Hz (-10 dB)
Frequency response: Diffuse-field equalized
Sound pressure level (SPL): 104 dB at 1V 1kHz
Impedance: 150 ?
THD+N: < 0,04% (1 kHz, 100 dB)
Ear coupling: Over-ear (circumaural)
Connector: Stereo jack plug, gold-plated
6.35 mm: unbalanced, 3-pin
4.4 mm: balanced, 5-pin
Adapter: 6.35 mm to 3.5 mm
Weight: Approx. 9.17 oz. (260 g) without cable

Sennheiser HD 660 S Audiophile Headphones (Free Strauss & Wagner SW-SPW301)