Sennheiser has introduced the latest addition to its 600 series family of headphones, the HD 660S2, which are designed to balance reference-level detail with engaging frequency response.
Offering enhanced sub-bass tuning, warm bass and smooth treble performance, they feature
improved transducer airflow and a refined voice coil. By reducing the voice coil’s weight, says Sennheiser, impulse response improves, bringing “hyper-realistic textures to the forefront of any performance reproduction.” The overall experience is smoother and warmer than the original HD 660S, Sennheiser clais, thanks to a tuning that reduces the distances between select peaks and troughs. The overall impedance matches that of the HD 600 and HD 650, at an audiophile-friendly 300 ohms, for “punchy dynamics and impressively low distortion.”
“Our new Sennheiser HD 660S2 offers listeners what they requested most from the headphones’ predecessor,” says Jermo Koehnke, Sennheiser Audiophile Product Manager. “With precision and power like no other and new sensitivity across all frequencies, listeners will hear details they’ve never heard before, especially at the lower end of the spectrum.”
Designed in Germany and manufactured at Sennheiser’s production facility in Ireland, the HD 660S2 come with plush earpads and cushy headband padding, which places the revised 300-ohm transducers at the optimal distance from the ear. This, in turn, results in a spacious soundstage with plenty of detail. The transducer surround drops the resonant frequency from 110 Hz (original HD 660S) down to 70 Hz for hefty kick drums. The outer mesh grilles, meanwhile, are crafted to manage airflow at the ideal impedance for open-back listening sessions.
The HD 660S2 ships with two 1.8-meter, user-detachable cables that terminate to 6.3 mm (1/4-inch) single-ended stereo and 4.4 mm balanced stereo jack plugs, respectively. A 6.3 mm to 3.5 mm (1/8-inch) adapter is also included, for use with popular hi-fi gear from DAC-amps, DAPs, and dedicated amplifiers such as the Sennheiser HDV 820. Distinguishing bronze accents complement the elegant jet-black finish, all of which is protected by a storage pouch.
The Sennheiser HD 660S2 will be available for pre-order globally from February 8, 2023, and will go on sale February 21, 2023, with an MSRP of 599 euros. Stay tuned for Canadian availability details.