Sennheiser Momentum 4 vs Sennheiser HD 660S2
Verdict
Our overall take, at a glance
Key takeaways
- Sennheiser Momentum 4 leads Sennheiser HD 660S2 overall by 53 points (89 vs 36 out of 100).
- Sennheiser Momentum 4 stands out on Audio Sensitivity: 106.
Sennheiser Momentum 4 leads overall
$379 at launch
Sennheiser Momentum 4
89
Sennheiser HD 660S2
36
Why it stands out
- Audio Sensitivity: 106
In-depth analysisAI
AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 2026.
Sennheiser Momentum 4
The Sennheiser Momentum 4 are over-ear wireless headphones designed for listeners who prioritize sound fidelity and long battery life. Despite being on the market for multiple years, they remain a prominent option in the active noise-canceling space. They offer a blend of high-quality audio reproduction, wireless connectivity, and active noise reduction.
Best for Long-haul travel requiring class-leading battery enduranceBest for Listeners seeking premium sound quality without paying the premium of the absolu
Pros
- Exceptional battery performance that minimizes the need for frequent charging
- High-fidelity audio quality that remains competitive with newer industry standards
- Capable active noise cancellation for daily commutes and travel
Cons
- Slightly outdated technology implementation compared to newer flagship rivals
- Minor software and usability rough edges in everyday operation
Sennheiser HD 660S2
The Sennheiser HD 660S2 is a reference headphone model known for its clear, detailed, and warm sound signature. The design includes rich black velour earpads, and the headphones are noted for being lightweight. It provides impressive vocal clarity in the midrange.
Best for vocal trackingBest for classical musicBest for rock
Pros
- Features a fuller and warmer bass response than the original HD 660S
- The sound is described as clear, crisp, and detailed without sounding overly analytical
- Provides excellent detail and separation, with vocals prominently featured
- Is noted for being comfortable for long listening sessions due to light weight and earpads
Cons
- Can have a rather tight clamping force out of the box
- May not be suitable for genres requiring extremely thunderous bass (e.g., EDM or rap)
Value for Money
Which is the better deal for the price
Pre-filled with launch prices where known — enter today's price for an up-to-date check. Use the same currency for both.
Sennheiser Momentum 4
Sennheiser HD 660S2
Physical Comparison
Weight, side by side
Sennheiser Momentum 4Sennheiser HD 660S2
Sennheiser Momentum 4 is 33 g (13%) heavier than Sennheiser HD 660S2.
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Review Videos
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Detailed Specifications
The full spec sheet, side by side