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• Nov 30, 2023
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The Sennheiser HD 660 S is a high-end, open-back headphone model known for its audiophile-grade sound quality.

Pros:

1. Audiophile-Grade Sound Quality:
   • The HD 660 S upholds Sennheiser’s reputation for exceptional sound quality. With a balanced sound signature, clear mids, detailed highs, and controlled bass, these headphones are a delight for audiophiles seeking an accurate and immersive listening experience.
2. Open-Back Design for Spacious Soundstage:
   • The open-back design contributes to a natural and expansive soundstage. This design choice is favored by many enthusiasts for its ability to create a more immersive and realistic audio experience.
3. Improved Transducers:
   • The HD 660 S features upgraded transducers compared to its predecessor, the HD 650, resulting in improved overall performance and fidelity.
4. Low Harmonic Distortion:
   • Sennheiser’s emphasis on low harmonic distortion ensures that the audio reproduction is clean and free from unwanted artifacts, preserving the integrity of the original recording.
5. Comfortable for Extended Use:
   • Designed with comfort in mind, the HD 660 S features plush ear cushions and an adjustable headband, allowing users to enjoy extended listening sessions without discomfort.
6. Detachable Cable for Versatility:
   • The inclusion of a detachable cable adds versatility, enabling users to replace or upgrade the cable based on their preferences or needs.
7. High Impedance for Audiophile Systems:
   • With an impedance of 150 ohms, the HD 660 S is designed to work optimally with dedicated headphone amplifiers, providing users with the opportunity to experience the headphones at their full potential.
8. Premium Build Materials:
   • Sennheiser’s commitment to quality is evident in the use of premium materials in the construction of the HD 660 S, ensuring durability and a luxurious feel.

Cons:

1. Open-Back Design Limits Isolation:
   • The open-back design, while providing a spacious soundstage, allows sound to leak in and out. This makes the HD 660 S less suitable for use in noisy environments and may disturb those around you.
2. High Impedance Requires Amplification:
   • The high impedance of 150 ohms necessitates the use of a dedicated headphone amplifier for optimal performance. While this enhances the audiophile experience, it may not be ideal for users without such equipment.
3. Not Suitable for Portable Use:
   • The open-back design and high impedance make the HD 660 S less practical for on-the-go use. They are best suited for a dedicated listening environment.

In Conclusion:

The Sennheiser HD 660 S is a standout choice for audiophiles seeking a high-fidelity listening experience. With its refined sound quality, comfortable design, and premium build, these headphones cater to those who appreciate accuracy and detail in their music. However, the open-back nature and high impedance make them more suitable for dedicated listening environments with proper amplification.