HD 660S2
SennheiserReleased Feb 1, 2023 · Analysis updated Jun 24, 2026
Sennheiser HD 660S2 wired headphones deliver great sound quality, improved sub-bass, strong bass, and a comfortable, sturdy design. The Sennheiser HD 660S2 scores 78/100 based on 9 expert reviews in the headphones (wired) category. Coverage includes reviews from Theaudiostore, Headfonics, Moon-audio, and Bloomaudio.
Critic Score
What's this?based on 9 expert reviews
Pros
- Great sound quality(5)
- Improved sub-bass performance(5)
- Strong bass(3)
- Comfortable and well-built design(2)
- Sturdy build quality(2)
Cons
- More expensive than it should be(2)
- Subjective performance is mediocre(2)
9 Publication Reviews
AI summary of this review
The HD 660S2 combines the best traits of the HD 600 and HD 650 while rejecting their flaws, resulting in a tighter, more modern, and engaging sound.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 is a clear technical step up on the HD 660S, offering superior extension on both ends of the spectrum and improved weight and dynamics.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 offers a modern take on a classic headphone with deeper bass, smoother treble, and a warmer sound signature.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 offers subtle but clear improvements over its predecessor with deeper bass extension and maintains the excellent detail and clarity expected from the HD 600 series.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 offers a warm, engaging sound with excellent soundstage and comfortable design, making it a great choice for both professionals and casual listeners.
Score estimated from the review text
AI summary of this review
Sennheiser HD660S2 offers a natural evolution of the Sennheiser house sound with improved bass, clarity, and technical performance.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 improve upon their predecessors while facing the daunting task of replacing a cult classic.
Score estimated from the review text
AI summary of this review
The Sennheiser HD 660S2 is a $600 open-back headphone with improved sub-bass and 300 Ohm impedance, but faces criticism for its basic packaging and sound quality compared to the classic HD 650.
Score estimated from the review text
AI summary of this review
Sennheiser HD 660S2 is a uniquely boring headphone with almost nothing of note tonally or subjectively to make it better, or even distinct from its predecessors or competitors in the market.
Score estimated from the review text
