Based on our overall comparison score, Marshall Monitor III ANC rates higher at 92/100 versus 35/100 for Sennheiser HD 660S2 — a 57-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 vs Sennheiser HD 660S2
Verdict
Our overall take, at a glance
Key takeaways
- Marshall Monitor III ANC leads Sennheiser HD 660S2 overall by 63 points (85 vs 22 out of 100).
- Marshall Monitor III ANC stands out on Comfort & Build Weight: 250 g.
Marshall Monitor III ANC leads overall
Marshall Monitor III ANC
85
Sennheiser HD 660S2
22
Why it stands out
- Comfort & Build Weight: 250 g
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
Sennheiser HD 660S2
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
Frequently Asked Questions
Common questions about Marshall Monitor III ANC vs Sennheiser HD 660S2 comparison
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 92/100 for Marshall Monitor III ANC and 35/100 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 (92/100 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, Marshall Monitor III ANC (92/100) 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.