Sennheiser - HD 660S2 Wired Over-the-Ear Headphones - Black
Customers are saying
Customers are delighted by the jaw-dropping sound quality and the high-quality, upgraded bass provided by these headphones. Users also frequently highlight the exceptional comfort of the design, making them pleasant for extended listening sessions. Additionally, many appreciate the open-back construction, noting that it is a worthwhile feature despite any initial hesitation.
Features
Natural, relaxed, high-fidelity sound with extra sub bass
Optimized surround and diaphragm with voice coil with 300-ohm impedance
Exceptional comfort and build quality
The open-back design offers exceptional breathability for long listening sessions
38mm high-performance transducers built in Ireland
Steel mesh damping follows the driver’s geometry to control air displacement, while the magnetic yoke includes milled air vents for optimal ventilation, which minimizes distortion
Frequency response
8 Hz - 41,500 Hz
Detachable cables
6.3mm & 4.4mm, + 3.5mm adapter. 1.8m cable length for comfortable desktop use
Specifications
- Sound ModeStereoConnection TypeWiredCarrying CaseNoHeadphone FitOver-the-EarAdjustable HeadbandNo
Reviews
Rating 4.7 out of 5 stars with 47 reviews
- Sound Quality (36)
- Comfort (9)
- Bass (8)
- Open Back (3)
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
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Despite the HD 660S’s standing as one of the world’s popular audiophile headphones, some customers nevertheless wanted one very specific enhancement: even deeper bass. Because whether it’s a thunderous crescendo of timpani or the pulsating beat of electronic dance music, there is nothing like accurate, powerful sub bass to infuse your listening with drama. Audiophiles—and anyone looking for comfortable, non-fatiguing, high-end headphones—can now get even more impact and emotion from the HD 660S2. The headphone’s warm, relaxed tone is reflected by their timeless styling with elegant bronze accents. With its open-back design and outstanding comfort, the HD 660S2 is also destined to be a favorite for long listening sessions. This version builds on all the strengths of its formidable predecessor. The same world-class precision and resolution still let you pick out individual instruments like with no other headphone. Or experience the joy of discovering sonic details in recordings you’ve known for years—now underscored with more and deeper low end. Indeed, the standard-setter for extended listening has now become the standard-setter for extended bass as well. Enhancing this heralded audio design without detracting from its many strengths was, however, a daunting task. So, our engineers set out to systematically identify and exploit every opportunity in their quest to improve on the acclaimed HD 660S design. We adjusted the compliance of the surround, for instance, dropping the resonance frequency to 70 Hz. Considerable effort went into optimizing the airflow around the transducer. The coil in the HD 660S2 has also been revised to match the legendary HD 600 & 650, resulting in an impedance of 300 ohms. The coil offers a high magnetic force and electrical damping for a clean impulse response. It also increases sensitivity over the entire frequency spectrum by using the magnet’s air gap more efficiently. Taken together, these efforts and more have paid off in spades. Sound pressure at the lowest octaves has doubled. Now, you can feel the music more than ever before—with all the depth and weight that ultra-low frequencies invoke. The lowest A on the piano (27.5 Hz) or the pounding root note of a bass drum (45-60 Hz) are just as big, expansive, and imposing as if they were live. The unique combination of impactful bass combined with the warm tuning and smooth treble will be a revelation for audiophile listeners. It’s an even better way to lose yourself in comfortable, non-fatiguing, high-end sound—while feeling its full low-end power.
Meet the HD 550, your gateway to audiophile sound at an accessible price. Ultra-light yet built to last, these headphones deliver all-day comfort and Sennheiser-grade durability with a new headband and metal mesh earcup covers. The sound is expansive and detailed, with a frequency range from 6 Hz to 39.5 kHz. Thanks to angled drivers and an open-back design, you’ll feel like you’re right in the action—whether it’s your favorite band or an adrenaline-pumping video game. For anyone craving more immersion, the HD 550 brings clarity and depth you've been missing. Goosebumps included.
Detailed, spacious and transparent sound. Wide range of applications on all devices thanks to STELLAR.45 driver with an impedance of 48 ohms
The HD 560S indulges the audiophile evaluating their music’s entire journey through the audio path. With linear acoustics and exceptional low-frequency performance the HD 560S was crafted for the analytical audio enthusiast. This open-back headphone is tuned to reveal every detail in your music without sacrificing the gratifying bass response. When combined with its ultralight chassis and luxurious comfort, it’s a breakthrough value in reference monitoring.
| Pros for Sennheiser - HD 660S2 Wired Over-the-Ear Headphones - Black | |||
|---|---|---|---|
| Sound Quality, Comfort, Bass, Open Back | Sound Quality, Comfort, Weight, Soundstage, Heat Dissipation | There were no pros for this product— | Sound Quality, Comfort, Bass, Weight, Fit |
| Cons for Sennheiser - HD 660S2 Wired Over-the-Ear Headphones - Black | |||
| There were no cons for this product— | There were no cons for this product— | There were no cons for this product— | Cable Length, Clamping Force |
Specs
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