Sennheiser unveils HD 660S2 headphones

Sennheiser's updated HD 660S2 expands the capabilities of the 600-series family, the longstanding benchmark for high-performance audiophile headphones. Sennheiser responded to the hi-fi community's feedback, crafting a headphone that skillfully balances reference-level detail with engaging frequency response. The headphone features a more dramatic listen with greater intensity from enhanced sub-bass tuning, extracting dynamic impact and emotion from audio enthusiasts' favorite recordings. The updated acoustics offer a delightful new way to experience music all over again.

​Improving on a beloved classic while retaining its best traits was a challenging task, starting with the lowest end of the frequency plot. The HD 660S2's warm bass characteristics pair perfectly with its silky-smooth treble performance and trademark vocal presence, allowing the timbre and uniqueness of any instrument part to stand out.

​Designed in Germany and manufactured at Sennheiser's state-of-the-art Ireland production facility, the HD 660S2 continues the series' emphasis on quality, functional design using materials that contribute to the hi-fi experience. Plush earpads and cushy headband padding place the revised 300-ohm transducers at the optimal distance from the ear resulting in a spacious soundstage with an abundance of detail - even for extended musical exploration. The transducer surround drops the resonant frequency from 110 Hz (original HD 660S) down to 70 Hz for hefty kick drums that move with ease. Even the outer mesh grilles are crafted to manage airflow at the ideal impedance for exquisite open-back listening sessions.