The Sennheiser HD 650 has long held a revered position in the audiophile community, its design a timeless classic and its sound signature a benchmark for open-back headphones. However, Sennheiser didn't rest on its laurels. The HD 660 S arrived, not as a replacement, but as an evolution, building upon the strengths of its predecessor while addressing some perceived weaknesses and introducing notable improvements. This in-depth review delves into the Sennheiser HD 660 S, exploring its design, sound quality, comfort, and overall value proposition to determine whether it truly deserves its place as a flagship headphone.
Design and Build Quality:
The HD 660 S maintains the familiar aesthetic of the HD 650 lineage, showcasing a refined and understated elegance. The earcups, crafted from a robust yet lightweight plastic, are larger and more comfortable than their predecessor. The headband, while still employing a similar design, feels more substantial and durable. The overall build quality is exceptional, reflecting Sennheiser's commitment to longevity and premium materials. The matte black finish is less prone to fingerprints than some glossy alternatives, adding to its practical appeal. The detachable cable, a welcome addition, allows for easier replacement and customization, enhancing both convenience and longevity. The cable itself is well-constructed and features a gold-plated 6.3mm connector, ensuring a secure and reliable connection. A 3.5mm adapter is also included in the package.
The earpads are plush and generously sized, providing ample space for the ears without feeling overly constricting. This results in exceptional comfort, even during extended listening sessions. The breathable material helps to keep the ears cool, mitigating the potential for discomfort associated with prolonged use. The clamping force is moderate, offering a secure fit without feeling overly tight or causing pressure points. The overall design prioritizes comfort and ergonomics, making the HD 660 S suitable for both casual and critical listening.
Sound Quality: A Detailed Analysis
The Sennheiser HD 660 S boasts a meticulously tuned sound signature that distinguishes itself from its predecessor while retaining the essence of the HD 650's appeal. The most significant improvement lies in the bass response. While the HD 650 was known for its slightly lean bass, the HD 660 S delivers a more substantial and controlled low-end. The bass is not overly emphasized, but rather provides a solid foundation that supports the midrange and treble without overpowering them. The improved bass response adds depth and richness to the overall sound, enhancing the listening experience across various genres.
The midrange is where the HD 660 S truly shines. It's remarkably detailed and transparent, allowing for subtle nuances in vocals and instruments to be easily discerned. The presentation is natural and uncolored, conveying the emotion and intention of the artist without any artificial coloration. The clarity and precision in the midrange are exceptional, making the HD 660 S a joy for listening to acoustic music, jazz, and classical compositions.
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