Sennheiser HD 660 S

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.

What’s in the box
1 x Sennheiser HD 660 S Open-Back Dynamic Headphones
1 x Cable with 1/4″ (6.35 mm) Plug
1 x Cable with 0.17″ (4.4 mm) Pentaconn Plug, Balanced
1 x 1/4″ to 1/8″ Adapter
1 x Storage Box