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The Sennheiser HD 660S2 has become a popular choice among audiophiles and casual listeners alike in 2026. Its design emphasizes comfort and fit, making it suitable for extended listening sessions. In this review, we compare the HD 660S2 with similar models to help you determine which pair might be best for your needs.
Design and Build Quality
The HD 660S2 features a robust yet lightweight construction. Its open-back design allows for a natural soundstage, but also means it’s less suitable for noisy environments. The ear cups are padded with plush velour, providing comfort during long listening periods. The adjustable headband ensures a secure fit for different head sizes.
Comfort and Fit
Compared to models like the Beyerdynamic DT 990 Pro and the Audio-Technica AD700X, the HD 660S2 offers superior comfort due to its softer padding and balanced clamping force. Users report that the ear cups do not cause fatigue even after several hours of use. The lightweight design reduces pressure on the head and neck.
Sound Quality and Listening Experience
The HD 660S2 delivers a detailed and natural sound profile. Its open-back architecture provides a wide soundstage, ideal for critical listening and mixing. When compared to the Sennheiser HD 600 or the AKG K702, the HD 660S2 offers a more refined bass response while maintaining clarity across the mid and high frequencies.
Comparison with Similar Models
- Sennheiser HD 600: Slightly less modern design, similar comfort, and comparable sound quality but with a different tonal balance.
- Beyerdynamic DT 990 Pro: Offers a more pronounced bass and a more aggressive treble, but can be less comfortable for long sessions.
- Audio-Technica AD700X: Lighter and more affordable, with a similar open-back design but slightly less detailed sound.
Conclusion
The Sennheiser HD 660S2 stands out for its combination of comfort, fit, and high-quality sound. It is an excellent choice for audiophiles seeking a natural listening experience and extended comfort. While other models may excel in certain areas, the HD 660S2 strikes a balanced profile that appeals to a broad audience.