Marshall Monitor III ANC vs Sennheiser HD 660S2

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

For most buyers the Marshall Monitor III ANC is the better pick — it scores 90/100 to the Sennheiser HD 660S2's 17, leading on Noise Cancelling and Wireless. Choose the Sennheiser HD 660S2 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

Marshall Monitor III ANC leads overall

Marshall Monitor III ANC

Sennheiser HD 660S2

Watch-outs

Compromises to know before you buy

Marshall Monitor III ANC

No notable compromises found.

Sennheiser HD 660S2

No microphone — you can't take calls.

Winner by category for Marshall Monitor III ANC vs Sennheiser HD 660S2
Category	Marshall Monitor III ANC	Sennheiser HD 660S2	Winner
Noise Cancelling	96	0	Marshall Monitor III ANC
Wireless	95	4	Marshall Monitor III ANC
Battery	98	0	Marshall Monitor III ANC
Comfort & Build	52	48	Marshall Monitor III ANC
Connectivity	96	4	Marshall Monitor III ANC

In-depth analysisAI

AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jul 2026.

Marshall Monitor III ANC

The Marshall Monitor III ANC is a pair of premium over-ear wireless headphones designed for music enthusiasts who value classic styling alongside modern noise-canceling technology. It features active noise cancellation, a highly collapsible design for portability, and a signature rugged aesthetic. This model aims to compete with major flagship headphones by balancing tactile physical controls with extended battery performance.

Best for Travelers needing maximum battery longevity between chargesBest for Listeners who prefer physical, tactile controls over touch-sensitive panels

Pros

Exceptionally long battery life ideal for multi-day use
Highly collapsible design makes them easy to pack and transport
Tactile multi-directional control knob offers intuitive playback adjustments
Durable, classic design inspired by iconic amplifier styling

Cons

Active noise cancellation performance may not entirely match the industry-leading isolation of key competitors

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.

Marshall Monitor III ANC

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Sennheiser HD 660S2

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Physical Comparison

Weigh them up, then compare real dimensions in 3D

Marshall Monitor III ANCSennheiser HD 660S2

Sennheiser HD 660S2 is 10 g (4%) heavier than Marshall Monitor III ANC.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Noise Cancelling

Feature	Marshall Monitor III ANC	Sennheiser HD 660S2
Active Noise Cancelling	Yes	No
Transparency Mode	Yes	No

Wireless

Feature	Marshall Monitor III ANC	Sennheiser HD 660S2
Wireless	Yes	No
Bluetooth Version		N/A
Supported Codecs	SBC, MPEG-2 AAC	N/A
Multipoint Connection	Yes	No

Battery

Feature	Marshall Monitor III ANC	Sennheiser HD 660S2
Battery Life (ANC On)	70 h	N/A
Quick Charge	Yes	No

Comfort & Build

Feature	Marshall Monitor III ANC	Sennheiser HD 660S2
Weight	250 g4% less	260 g
Folding Design	Yes	No
Water Resistance	N/A	N/A
Dimensions	15.5 × 22 × 7 cm	15 × 20 × 10 cm

Connectivity

Feature	Marshall Monitor III ANC	Sennheiser HD 660S2
Wired Connection	USB-C to 3.5mm	6.35mm + 4.4mm balanced
Detachable Cable	No	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 Marshall Monitor III ANC vs Sennheiser HD 660S2 comparison

Based on our overall comparison score, Marshall Monitor III ANC rates higher at 84/100 versus 24/100 for Sennheiser HD 660S2 — a 60-point lead. Marshall Monitor III ANC 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.

Marshall Monitor III ANC 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 Marshall Monitor III ANC and 24/100 for Sennheiser HD 660S2.

At launch, Marshall Monitor III ANC was the more affordable option ($350) versus Sennheiser HD 660S2 ($599). Weigh that against the overall scores (84/100 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, Marshall Monitor III ANC (84/100) 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.