Sennheiser Momentum 4 vs Sennheiser HD 660S2

Updated Jun 2026 · Scored by the Let’s Compare Data Engine · How we score

For most buyers the Sennheiser Momentum 4 is the better pick — it scores 88/100 to the Sennheiser HD 660S2's 20, leading on Noise Cancelling and Wireless. Choose the Sennheiser HD 660S2 instead if comfort & build matters most to you, where it comes out ahead.

Sound quality isn't scored yet (we have no measured audio data), so the score covers features, battery, noise cancelling and build.

Verdict

Our overall take, at a glance

Sennheiser Momentum 4 leads overall

Sennheiser Momentum 4

Sennheiser HD 660S2

Watch-outs

Compromises to know before you buy

Sennheiser Momentum 4

No notable compromises found.

Sennheiser HD 660S2

No microphone — you can't take calls.

Winner by category for Sennheiser Momentum 4 vs Sennheiser HD 660S2
Category	Sennheiser Momentum 4	Sennheiser HD 660S2	Winner
Noise Cancelling	96	0	Sennheiser Momentum 4
Wireless	94	4	Sennheiser Momentum 4
Battery	98	0	Sennheiser Momentum 4
Comfort & Build	45	55	Sennheiser HD 660S2
Connectivity	96	4	Sennheiser Momentum 4

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…

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Slightly outdated technology implementation compared to newer flagship rivals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

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Sennheiser HD 660S2

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Physical Comparison

Weigh them up, then compare real dimensions in 3D

Sennheiser Momentum 4Sennheiser HD 660S2

Sennheiser Momentum 4 is 33 g (13%) heavier than Sennheiser HD 660S2.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Noise Cancelling

Feature	Sennheiser Momentum 4	Sennheiser HD 660S2
Active Noise Cancelling	Yes	No
Transparency Mode	Yes	No

Wireless

Feature	Sennheiser Momentum 4	Sennheiser HD 660S2
Wireless	Yes	No
Bluetooth Version		N/A
Supported Codecs	SBC, AAC, aptX, aptX Adaptive	N/A
Multipoint Connection	Yes	No

Battery

Feature	Sennheiser Momentum 4	Sennheiser HD 660S2
Battery Life (ANC On)	60 h	N/A
Quick Charge	Yes	No

Comfort & Build

Feature	Sennheiser Momentum 4	Sennheiser HD 660S2
Weight	293 g	260 g11% less
Folding Design	No	No
Water Resistance	N/A	N/A
Dimensions	18.0 × 19.5 × 4.63 cm	15 × 20 × 10 cm

Connectivity

Feature	Sennheiser Momentum 4	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.

Frequently Asked Questions

Common questions about Sennheiser Momentum 4 vs Sennheiser HD 660S2 comparison

Based on our overall comparison score, Sennheiser Momentum 4 rates higher at 82/100 versus 24/100 for Sennheiser HD 660S2 — a 58-point lead. Sennheiser Momentum 4 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.

Sennheiser Momentum 4 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 82/100 for Sennheiser Momentum 4 and 24/100 for Sennheiser HD 660S2.

At launch, Sennheiser Momentum 4 was the more affordable option ($379) versus Sennheiser HD 660S2 ($599). Weigh that against the overall scores (82/100 vs 24/100) 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, Sennheiser Momentum 4 (82/100) edges out Sennheiser HD 660S2 (24/100). 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.