Sony WH-1000XM4 vs Sennheiser HD 660S2 - Headphones Comparison Guide | Let's Compare
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 56 points (87 vs 31 out of 100).
Sony WH-1000XM4 stands out on Comfort & Build Weight: 254 g.
Sony WH-1000XM4 leads overall
$349 at launch
Sony WH-1000XM4
87
Sennheiser HD 660S2
31
Why it stands out
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
Video — reviews used (3)
Video review by Marques Brownlee noting the model as an improved iteration over the XM3 with a complex product name.
Generated Jun 30, 2026
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)
Video — reviews used (3)
Compares the HD 660S2 to the original and details its sound improvements and comfort features
Generated Jun 28, 2026
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 HD 660S2 is 6 g (2%) heavier than Sony WH-1000XM4.
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Review Videos
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Detailed Specifications
The full spec sheet, side by side
Noise Cancelling
Feature
Sony WH-1000XM4
Sennheiser HD 660S2
Active Noise Cancelling
Yes
No
Transparency Mode
Yes
No
Wireless
Feature
Sony WH-1000XM4
Sennheiser HD 660S2
Wireless
Yes
No
Bluetooth Version
N/A
Supported Codecs
SBC, AAC, LDAC
N/A
Multipoint Connection
Yes
No
Battery
Feature
Sony WH-1000XM4
Sennheiser HD 660S2
Battery Life (ANC On)
30 h
N/A
Quick Charge
Yes
No
Comfort & Build
Feature
Sony WH-1000XM4
Sennheiser HD 660S2
Weight
254 g
260 g
Folding Design
Yes
No
Water Resistance
N/A
N/A
Dimensions
18.47 × 25.25 × 7.7 cm
N/A
Connectivity
Feature
Sony WH-1000XM4
Sennheiser HD 660S2
Wired Connection
3.5mm
6.35mm + 4.4mm balanced
Detachable Cable
Yes
Yes
Built-in Microphone
Yes
No
Specification Note
Specifications are compiled from official manufacturer data and other reliable internet sources. Some features may vary by region or model configuration.