The Sennheiser HD 660 S Headphones: An Audiophile's Dream Come True

As an audiophile, finding the perfect pair of headphones can feel like an endless quest filled with peril. You journey far and wide, enduring blistered ears and depleted wallets, searching desperately for that mythical sonic holy grail. Just when all hope seems lost, a beam of light pierces the darkness - the Sennheiser HD 660 S. Could these open-backed German engineered beauties be the long-awaited answer to an audiophile’s prayers? Let’s discuss.

Overview

The Sennheiser HD 660 S Headphone are open-back dynamic hi-fi headphones first released in 2017. Building upon the legendary HD 600 and HD 650 models, the Sennheiser HD 660 S Headphone utilize new specially designed transducers to deliver breathtakingly natural and accurate sound reproduction. With an accessible 150 ohm impedance, ergonomic design and versatile connectivity options, could the Sennheiser HD 660 S Headphone be the ultimate all-purpose audiophile headphone?

Key Features:

• Sublimely realistic sound with abundant detail and spacious imaging that immerses you in the music.

• Open-backed design provides an exceptionally natural and open soundstage, allowing audio to breathe freely.

• Custom transducers engineered for minimal harmonic distortion result in remarkably pure and accurate audio reproduction.

• Plush lightweight construction offers cloud-like comfort for endless listening satisfaction without pinched ears or headaches.

Design

Sporting Sennheiser’s iconic open-back look, the Sennheiser HD 660 S Headphone are as stylish as they are comfortable. The lightweight construction and plush padding allow for fatigue-free listening over extended sessions. No more sore ears or aching headbands! An open-back design does mean sound leakage, so keep that in mind. The included cables are long enough to provide plenty of slack, letting you rock out without accidentally yanking your device off the desk.

Sound Quality

Turn on your favorite sonic delicacy and prepare to be amazed. The Sennheiser HD 660 S Headphone produce astonishingly clear and detailed sound across the frequency spectrum. Crisp highs dance with delight, while punchy lows boom with joy. The midrange is lush and lifelike, making vocals dazzle and instruments sing. Closed-back models boast big bass but sacrifice soundstage - not so with the Sennheiser HD 660 S Headphone’s spacious open-back design. The imaging is holographic, allowing you to pinpoint sounds in a three-dimensional space. From jazz soloists to heavy metal shredders, nothing gets lost in the mix.

Features

The specially engineered transducers deliver startlingly low harmonic distortion for a crystal clear listening experience. Channel matching is within 1 dB for stellar stereo imaging. The 150 ohm impedance makes the headphones easy to drive from a variety of devices. Swappable cables utilize a standard 6.35mm plug or balanced 4.4mm Pentaconn connector for versatile connectivity.

Compatibility

The 150 ohm impedance and choice of cables allow the Sennheiser HD 660 S Headphone to pair well with desktop amps, AV receivers, mobile devices, and high-res digital audio players. The headphones are easy to drive but scale up nicely when paired with a headphone amp. Just be sure your sources are of suitably high quality to take advantage of everything these headphones have to offer. Garbage in, garbage out, as they say!

Connectivity:

• Wired analog connection via included 6.35mm or 4.4mm Pentaconn cable
• Easily driven from desktop amps, mobile devices, AV receivers, gaming consoles

Controls:

• No onboard controls, playback is controlled solely on the connected audio source device

Pros and Cons

Pros:

• Breathtakingly natural and accurate sound
• Spacious open-back design with 3D imaging
• Extremely comfortable for long listening sessions
• Easy to drive from a variety of sources
• Quality construction and accessories

Cons:

• Open-back allows sound leakage
• Bass lighter than some closed-back models
• Bright treble may be fatiguing for some
• Higher price tag

Use Cases:

Let the Sennheiser HD 660 S Headphone whisk you away to sonic paradise whether you’re:
- Blissfully reclining in your favorite armchair after a long day to relax with hi-res Mozart or Coltrane.
- Reveling in the immersive worlds of your favorite fantasy or sci-fi cinematic soundtracks.
- Mixing your magnum opus audiophile-quality music album or podcast with analytical precision.
- Competing in epic all-night multiplayer gaming battles where pinpoint audio localization gives you the winning edge.

User Feedback Analysis:

Audiophiles around the world have sung glorious praises for the Sennheiser HD 660 S Headphone, with many describing them as their end-game headphone that completes their quest for sonic perfection.

The immaculate sound reproduction has been hailed as breathtakingly beautiful, painting soundscapes with utmost realism that makes listeners feel transported into the studio or concert hall. The expansive soundstage and holographic imaging thoroughly envelops the listener, provoking spine-tingling emotional responses. Vocals are sublimely natural with keenly precise detail that elicits tears of joy. Instruments are vibrantly rendered across the entire frequency range.

While some lament the polite bass that lacks the seismic rumbling and guttural growling possible on certain closed-back models, most agree the tighter controlled bass is optimally balanced for mastering neutrality. Mids and highs sparkle with crystal clarity like sunlight glistening on a pristine alpine lake. The open-back spatiality and imaging is considered a divine revelation compared to most closed-back offerings.

Comfort is extolled enthusiastically by reviewers, with lavish velour earpads hugging ears like a fluffy cloud on a spring breeze. The feather-lightweight construction liberates listeners from neck strain over long listening marathons. New converts confess to becoming hopelessly addicted to the euphoric comfort.

Build quality earns resounding applause, with smart industrial design delivering robust reliability worthy of a lifelong partner. Thoughtfully included accessories display meticulous attention to detail. The out-of-box experience feels special, yet understated in stereotypical German fashion.

In summary, Sennheiser has unleashed an exquisite masterpiece destined to be remembered as an all-time great, eliciting obsession among audiophiles seeking paradisiacal musical immersion. For many reviewers, the Sennheiser HD 660 S Headphone is the cherished companion that fulfills a lifelong yearning for sonic nirvana.

Pros:

• Heavenly sound quality
• Featherweight comfort
• Easy to drive from most sources
• Quality accessories included
• 2-year warranty

Cons:

• Open-back allows sound leakage
• Bass lighter than some closed-back models
• Bright treble fatiguing for small minority
• Pricey for budget-minded buyers

Value:

While expensive for mainstream buyers, the Sennheiser HD 660 S HeadphoneS deliver a peerless audiophile experience that makes them a stellar value for serious listeners wanting exquisite German-engineered sound.

Conclusion

The Sennheiser HD 660 S Headphone deliver a world-class listening experience that makes your music shine. With stunning sound, great comfort and versatile connectivity, they are a top-tier open-back audiophile headphone. As long as you feed them proper quality sources, the Sennheiser HD 660 S Headphone will take your listening pleasure to heavenly heights. While not cheap, serious listeners will cherish the sublime musical magic these headphones conjure. The quest is over my audiophile brethren - in the Sennheiser HD 660 S Headphone, we have found audio nirvana.

Specifications:

• Style: Open-back dynamic headphones
• Transducer: Newly designed by Sennheiser
• Frequency response: 10 - 41,000 Hz
• Sound pressure level: Unknown
• Total harmonic distortion: Extremely low
• Impedance: 150 Ohms
• Connectors: 6.35mm AND 4.4mm Pentaconn balanced
• Weight: 9.3 oz
• 2 year warranty

Box Contains:

• 1x Sennheiser HD 660 S headphones
• 6.35mm stereo cable
• 4.4mm Pentaconn balanced cable
• 6.35mm to 3.5mm adapter
• Manual

How to Use:

1. Unbox your shiny new HD 660 S headphones and accessories.
2. Choose the appropriate included audio cable for your playback device.
3. Connect the cable to the headphones on one end, and your headphone jack on the other.
4. Place the supremely comfortable headphones over your ears.
5. Queue up your highest quality music tracks.
6. Sit back, relax, and let your HD 660 S transport you to audio paradise.