High-Performance Audiophile Open-Back Headphones for Consumers

Sennheiser's new HD 660 S is a meticulously crafted, open-back, dynamic headphone designed for the passionate audiophile. It builds upon the legacy of the legendary HD 650, surpassing the exceptional performance of its predecessor by incorporating a new and improved transducer that delivers lower harmonic distortion, producing a more natural and lifelike audio experience.

The HD 660 S is exceptionally accurate and transparent, with an expressiveness that immerses the listener in every emotion and nuance of the music. Employing a lower 150-ohm impedance and supplied with cables using balanced (4.4 mm Pentaconn) and 6.35 mm connectors, the headphone offers connectivity versatility, providing reference-class fidelity with both stationary and mobile audio players.

The transducers used in the HD 660 S are hand-selected for precise (1 dB) left/right matching tolerance, ensuring exceptional accuracy and presentation of stereo spatial characteristics. The 150-ohm nominal impedance allows direct connection to high-resolution audio devices, both at home and on the go.

The headphone's para-aramid reinforced, detachable cables employ high-conductive OFC copper to ensure signal integrity with very low handling noise. The HD 660 S is supplied with two connection cables: one with a 6.35 millimeter stereo plug and the other with a 4.4 millimeter Pentaconn balanced stereo plug. Additionally, a 6.35 millimeter to 3.5 millimeter adaptor is included.

The HD 660 S has a frequency response of 10 to 41,000 Hz (-10 dB) and an impedance of 150 ohms, making it a versatile choice for a wide range of audio devices. Users are advised to refer to the user manual provided as a PDF manual in the product description section for additional information and instructions.

In summary, the Sennheiser HD 660 S is a reference-class, open-back, dynamic headphone that delivers exceptional audio performance, accuracy, and connectivity. Its meticulously crafted design and advanced features make it a compelling choice for passionate audiophiles seeking a truly immersive listening experience.

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