Sennheiser HD 660S2 Wired Audiophile Stereo Headphone

Sennheiser HD 660S2

The Sennheiser HD 660S2 is a refined masterpiece in the world of audiophile-grade headphones. Designed for critical listening, this model builds on the legacy of the original HD 660S by introducing a deeper sub-bass response, enhanced airflow management, and optimized transducer design, all within an open-back stereo configuration that ensures immersive, natural sound reproduction.

Whether you’re reading a Sennheiser HD 660S2 review, comparing Sennheiser HD 660 S headphones vs HD 660S2 specs, or exploring what sets this model apart in the market, you’ll quickly understand why the Sennheiser HD 660S2 wired audiophile stereo headphones are a must-have for serious listeners.

High-Fidelity Sound with Sub-Bass Enhancement

Unlike its predecessor, the Sennheiser HD 660S2 introduces a significant low-frequency performance upgrade. Thanks to a newly optimized voice coil and enhanced driver system, this model delivers double the sound pressure in the lowest frequency ranges, giving you visceral impact and presence.

Feel the resonance of a piano’s low A (27.5 Hz) or the punch of a kick drum at 50 Hz with full-bodied weight—something often lacking in traditional open-back headphones. This makes the HD 660S2 an ideal solution for audiophiles who want analytical detail without sacrificing warmth and depth.

42mm High-Performance Transducers with Airflow Optimization

At the core of the Sennheiser HD 660S2 headphones is a set of airflow-optimized 42mm transducers. These high-performance dynamic drivers feature a vented magnet system that reduces unwanted distortion by improving internal airflow. The result is cleaner signal handling, smoother transitions between frequencies, and precise imaging.

Additionally, steel mesh damping controls air displacement within the earcup, helping maintain a neutral frequency response with minimal coloration. This is ideal for mastering, mixing, or simply enjoying lossless audio in its purest form.

UltraAluminum Voice Coil with 300-Ohm Impedance

The 300-ohm impedance is a hallmark of serious audiophile headphones, and the HD 660S2 continues this tradition. Designed for use with dedicated headphone amplifiers and high-resolution DACs, this high impedance allows for excellent impulse response, superior dynamic range, and significantly reduced distortion.

The ultra-light aluminum voice coil contributes to the headphone’s ability to reproduce complex transients—capturing every nuance of a track, from the snap of a snare drum to the delicate decay of a reverb tail.

Open-Back Design for Natural Surround

The Sennheiser HD 660S2 wired audiophile stereo headphones feature an open-back architecture that allows air and sound to move freely through the ear cups. This design not only enhances comfort by allowing heat to dissipate but also contributes to a wider, more spatial listening experience.

With its optimized surround and angled driver configuration, the HD 660S2 delivers sound as though it’s coming from all around you—not just inside your head. The realism is jaw-dropping, making orchestral, acoustic, and binaural recordings feel incredibly lifelike.

Long Listening Sessions

Comfort is paramount in extended listening, and Sennheiser gets it right with the HD 660S2. The plush, breathable ear cushions are soft on the skin and allow for long sessions without discomfort. The headband is both lightweight and durable, with even pressure distribution across the top of the head.

Whether you’re in a professional studio, relaxing at home, or critically analyzing mixes, these headphones offer the kind of comfort that makes time disappear.

🇩🇪 German Design, Irish Craftsmanship – Built to Last

Designed in Germany and manufactured in Ireland, the HD 660S2 embodies Sennheiser’s legendary commitment to precision engineering. The build quality is exceptional, with premium materials used throughout. Even in its renewed condition, each unit is fully tested and certified for like-new performance, backed by Sennheiser’s quality standards.

The detachable long cables are ideal for desktop and studio setups, offering flexibility and convenience without sacrificing quality.

Top 5 Frequently Asked Questions (FAQs)

What’s the difference between the Sennheiser HD 660 S and HD 660S2?

The main improvements in the Sennheiser HD 660S2 include enhanced sub-bass performance, a vented magnet system, and better airflow control. Compared to the original HD 660 S, the HD 660S2 offers richer low-end frequencies and improved comfort while retaining the same audiophile-grade clarity and precision.

Do the Sennheiser HD 660S2 headphones require a headphone amplifier?

Yes. With an impedance of 300 ohms, the HD 660S2 is best used with a dedicated headphone amplifier or high-quality DAC. This ensures you’ll get the full dynamic range and clarity that the headphones are capable of producing.

 Are the Sennheiser HD 660S2 headphones suitable for gaming or casual use?

While primarily designed for audiophiles and studio use, the HD 660S2’s open-back design and wide soundstage make it great for immersive single-player gaming, sound design, and cinematic experiences. However, they are not ideal for noisy environments or competitive gaming due to their open-back nature.

Is the renewed version as good as new?

Yes. The renewed Sennheiser HD 660S2 units are inspected, tested, and certified to perform like-new. They meet Sennheiser’s strict performance criteria and often come at a more affordable price point, making them an excellent value for audiophiles on a budget.

 What kind of music benefits most from the Sennheiser HD 660S2?

Genres such as classical, jazz, acoustic, instrumental, and high-resolution recordings benefit the most from the HD 660S2’s detailed response and open soundstage. However, the improved bass response now also makes them suitable for electronic, ambient, and cinematic genres that demand deep low-end accuracy.