Sennheiser HD 660S2 vs Audio-Technica ATH-M50x

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

For most buyers the Sennheiser HD 660S2 is the better pick — it scores 27/100 to the Audio-Technica ATH-M50x's 24, leading on Comfort & Build. Choose the Audio-Technica ATH-M50x instead if you want to spend less.

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 HD 660S2 and Audio-Technica ATH-M50x are closely matched

Sennheiser HD 660S2

Audio-Technica ATH-M50x

Where Sennheiser HD 660S2 stands out

Comfort & Build Weight: 260 g (9% less)

Watch-outs

Compromises to know before you buy

Sennheiser HD 660S2

No microphone — you can't take calls.

Audio-Technica ATH-M50x

No microphone — you can't take calls.

Winner by category for Sennheiser HD 660S2 vs Audio-Technica ATH-M50x
Category	Sennheiser HD 660S2	Audio-Technica ATH-M50x	Winner
Noise Cancelling	0	0	Tie
Wireless	15	15	Tie
Battery	0	0	Tie
Comfort & Build	54	46	Sennheiser HD 660S2
Connectivity	15	15	Tie

In-depth analysisAI

AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 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)

Audio-Technica ATH-M50x

The Audio-Technica ATH-M50x is a pair of closed-back professional monitor headphones designed for audio tracking, mixing, and critical listening. Released as part of a remastered M-Series lineup, it serves as the direct successor to the widely popular ATH-M50, offering a refined design tailored for both studio environments and creators.

Best for Studio mixing and audio monitoringBest for Video editing and content creation

Pros

Detachable cable design that addresses a major limitation of the previous model
Collapsible, folding design that makes them easier to pack and transport
Reliable and accurate sound signature preferred for studio monitoring

Cons

Wired-only base configuration that lacks modern conveniences like active noise cancellation or wireless connectivity

Source

Audio-Technica - WikipediaConfirms Audio-Technica's history and the 2014 release of the remastered M-Series line including the ATH-M50x.

Video — reviews used (3)

Highlights the ATH-M50x as the successor to the original M50 and references the transition to a removable cable system.

Generated Jun 30, 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

Check Price on Amazon

Audio-Technica ATH-M50x

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Physical Comparison

Weigh them up, then compare real dimensions in 3D

Sennheiser HD 660S2Audio-Technica ATH-M50x

Audio-Technica ATH-M50x is 25 g (10%) heavier than Sennheiser HD 660S2.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Wireless

Feature	Sennheiser HD 660S2	Audio-Technica ATH-M50x
Wireless	No	No
Supported Codecs	N/A	N/A

Comfort & Build

Feature	Sennheiser HD 660S2	Audio-Technica ATH-M50x
Weight	260 g9% less	285 g
Folding Design	No	Yes
Water Resistance	N/A	N/A
Dimensions	15 × 20 × 10 cm	22.1 × 24.1 × 10.9 cm

Connectivity

Feature	Sennheiser HD 660S2	Audio-Technica ATH-M50x
Wired Connection	6.35mm + 4.4mm balanced	3.5mm
Detachable Cable	Yes	Yes
Built-in Microphone	No	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 HD 660S2 vs Audio-Technica ATH-M50x comparison

They are closely matched: Sennheiser HD 660S2 scores 24/100 and Audio-Technica ATH-M50x scores 23/100 in our overall comparison — within 1 point. Neither is a clear winner overall, so the decision comes down to the specific features and price that matter most to you.

Sennheiser HD 660S2 and Audio-Technica ATH-M50x 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 24/100 for Sennheiser HD 660S2 and 23/100 for Audio-Technica ATH-M50x.

At launch, Audio-Technica ATH-M50x was the more affordable option ($169) versus Sennheiser HD 660S2 ($599). Weigh that against the overall scores (24/100 vs 23/100) 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.

It's close — Sennheiser HD 660S2 (24/100) and Audio-Technica ATH-M50x (23/100) score almost the same. Pick based on price and the individual specs that matter most to you; the comparison above shows where each one pulls ahead.