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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want the more mature active noise cancellation and a lighter, all-day comfort fit from a brand that has spent years refining exactly this kind of headphone, choose Bose QuietComfort 45; if you need marathon battery life, a rugged foldable build, and a wider, more immersive soundstage, choose Marshall Monitor III A.N.C.
• Bose QuietComfort 45 — biggest strength: refined active noise cancellation with a dedicated Aware Mode, plus a plush, low-clamping over-ear fit built for long sessions.
• Bose QuietComfort 45 — biggest trade-off: roughly a full day of playback per charge, which is modest next to the Marshall's multi-day figure.
• Marshall Monitor III A.N.C — biggest strength: extraordinary battery life (up to 70 hours with ANC on, 100 hours with it off) and a foldable, rugged body that travels well.
• Marshall Monitor III A.N.C — biggest trade-off: button-based controls and a slightly heavier, more "gear-like" feel rather than Bose's minimalist touch approach.
• Who Bose is for: frequent flyers, commuters and open-office workers who prioritize quiet and comfort above everything else.
• Who Marshall is for: long-haul travelers, festival-goers and listeners who want big, spatial sound and don't want to think about charging for days.
The QuietComfort 45 is the classic "quiet first" headphone. Bose uses tiny microphones to measure outside noise and cancel it with opposite signals, and the result is the kind of steady, even noise floor that makes airplane cabins and train carriages feel noticeably calmer. There are two listening modes: Quiet Mode for full cancellation, and Aware Mode, which pipes the outside world back in so you can hear an announcement or a colleague without pulling the headphones off.
Comfort is clearly the other pillar here. These are over-ear headphones with plush synthetic leather cushions and impact-resistant nylon, and Bose specifically designs them with minimal clamping force. That matters more than spec sheets suggest — it's the difference between a headphone you tolerate for two hours and one you forget you're wearing on a transatlantic flight. The acoustic side leans on Bose's TriPort architecture for depth and fullness, with volume-optimized Active EQ that keeps bass consistent when you turn things down and keeps the music clear when you turn it up. Bluetooth 5.1, a 2.5 mm jack, touch-based noise control and app-based personalization round out a package aimed at adults who want one thing done very well.
Marshall Monitor III A.N.C: Who It's For
Marshall's Monitor III A.N.C takes a different angle: it's the headphone for people who want to disappear into music for days at a time. The headline number is battery life — up to 70 hours of wireless playtime with active noise cancellation switched on, and up to 100 hours with it off. In practice that means charging it roughly once a week, or packing it for a trip without the charger. A 2.5-hour charge time applies to both, but you'll be doing it far less often.
The noise cancellation has been upgraded over the previous generation, with new technology that continuously measures ambient noise and blocks unwanted sound. There are three levels of cancellation, so you can dial it in rather than accepting one fixed setting, and a Transparency mode lets the outside back in when you need it. On sound, Marshall leans into its signature tuning with Dynamic Loudness, which adjusts treble, mids and bass at every volume level, plus a Soundstage spatial audio feature that pushes music out of your head for a wider, more immersive presence. If you like your music to feel big rather than neutral, that's the pitch.
Physically, this is a rugged headphone. The build is meant to handle everyday wear and tear, the ear cushions are soft enough for all-day listening, and the foldable design packs into a premium hard case — a detail that matters if the headphone lives in a backpack. Bluetooth 5.3, a 3.5 mm jack, a USB-C to 3.5 mm detachable audio cord, and button-based controls with app support fill out the feature list. It weighs a touch less than the Bose on paper, but the metal-and-plastic shell feels more like gear and less like furniture.
Who should buy it: travelers, festival-goers, and anyone who values battery life and a tough, packable design. Who should skip it: if you want the most polished noise cancellation available or you strongly prefer touch controls, Bose is the safer call.
Side-by-Side: Which Should You Choose?
• Best for battery life → Marshall Monitor III A.N.C. Up to 70 hours with ANC on and 100 hours without — several times the Bose's roughly one-day figure.
• Best for all-day comfort → Bose QuietComfort 45. Plush synthetic leather, impact-resistant nylon and deliberately minimal clamping force.
• Best for travel durability → Marshall Monitor III A.N.C. Rugged build plus a foldable design that fits its premium hard case.
• Best for immersive, big sound → Marshall Monitor III A.N.C. Dynamic Loudness and the Soundstage spatial audio feature widen the presentation.
• Best for balanced, consistent audio at any volume → Bose QuietComfort 45. Volume-optimized Active EQ keeps bass and clarity steady as you change levels.
• Best for controls → Bose QuietComfort 45. Touch-based noise control versus the Marshall's button layout (a matter of taste).
• Best for connectivity longevity → Marshall Monitor III A.N.C. Bluetooth 5.3 versus Bluetooth 5.1, with a wider stated range.
If I had to pick one, I'd buy the Bose QuietComfort 45. In my opinion, noise cancellation and comfort are the two things you actually notice every single day with an over-ear headphone, and that's exactly where Bose puts its effort. The Marshall Monitor III A.N.C is genuinely impressive — that battery life is on another level, and the foldable hard-case design is smarter for travel. But if you fly, commute or work in a noisy space, the Bose's Aware/Quiet modes and low-clamping fit will do more for you hour to hour. Choose the Marshall if charging anxiety is your main enemy and you want your music to feel bigger.
FAQ
Yes, clearly. Marshall states up to 70 hours of wireless playtime with ANC on and up to 100 hours without it, while the Bose QuietComfort 45 is rated around a single day of playback. If you hate charging, Marshall wins.
Both use active noise cancellation, but they approach it differently. Bose pairs Quiet Mode with an Aware Mode for hearing your surroundings, while Marshall offers three adjustable cancellation levels plus Transparency mode. In my opinion Bose's system is the more refined of the two, though Marshall's is more flexible.
Yes. The Monitor III A.N.C has a foldable design and ships with a premium hard case, which makes it easier to pack than the Bose QuietComfort 45, whose build is more about comfort than collapsing down.
Both are premium over-ear headphones, and prices move around, so check the current price on Amazon before deciding. Weigh that against what you value most: Bose for quiet and comfort, Marshall for battery and a rugged, spatial-sound experience.
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See also: Marshall Monitor III A.N.C vs Skullcandy Crusher, Picun B8 vs Bose QuietComfort, Califone 2810-PA vs Bose QuietComfort 35