Based on our overall comparison score, Sony WH-1000XM4 rates higher at 84/100 versus 35/100 for Sennheiser HD 660S2 — a 49-point lead. Sony WH-1000XM4 is the stronger overall pick, though the right choice still depends on which specs matter most to you; the full spec table above breaks down every difference.
Sony WH-1000XM4 vs Sennheiser HD 660S2
Verdict
Our overall take, at a glance
Key takeaways
- Sony WH-1000XM4 leads Sennheiser HD 660S2 overall by 69 points (88 vs 19 out of 100).
- Sony WH-1000XM4 stands out on Audio Driver Size: 40 mm, Comfort & Build Weight: 254 g.
Sony WH-1000XM4 leads overall
Sony WH-1000XM4
88
Sennheiser HD 660S2
19
Why it stands out
- Audio Driver Size: 40 mm
- Comfort & Build Weight: 254 g
In-depth analysisAI
AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 2026.
Sony WH-1000XM4
The Sony WH-1000XM4 is a pair of premium wireless over-ear headphones designed for consumers seeking top-tier noise cancellation and audio performance. Serving as a refined successor to the popular XM3, this model focuses on iterative performance and usability upgrades for daily commuters and travelers.
Best for Commuters and travelers prioritizing high-quality noise isolationBest for Users looking for a polished upgrade to the older XM3 model
Pros
- Refined performance and design updates over the predecessor
- Excellent reputation for active noise cancellation and sound isolation
Cons
- Confusing and highly convoluted product naming convention
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.
Sony WH-1000XM4
Sennheiser HD 660S2
Physical Comparison
Weigh them up, then compare real dimensions in 3D
Sony WH-1000XM4Sennheiser HD 660S2
Sennheiser HD 660S2 is 6 g (2%) heavier than Sony WH-1000XM4.
Review Videos
Hand-picked expert reviews for each product
Detailed Specifications
The full spec sheet, side by side
Frequently Asked Questions
Common questions about Sony WH-1000XM4 vs Sennheiser HD 660S2 comparison
Sony WH-1000XM4 and Sennheiser HD 660S2 are compared side by side above across every spec in the headphones category — including performance, features and design — each scored 0–100 so you can see exactly where one leads the other. Our overall scores are 84/100 for Sony WH-1000XM4 and 35/100 for Sennheiser HD 660S2.
At launch, Sony WH-1000XM4 was the more affordable option ($349) versus Sennheiser HD 660S2 ($599). Weigh that against the overall scores (84/100 vs 35/100) and the value-for-money meter above to judge whether the higher-rated model justifies its price for your needs. Current retail prices vary — check the retailer.
If you want the higher-rated headphones option overall, Sony WH-1000XM4 (84/100) edges out Sennheiser HD 660S2 (35/100). But if Sennheiser HD 660S2 is cheaper or stronger on the specific specs you care about, it can still be the better buy — use the spec table and strengths profile above to decide.