Compare Marshall Monitor III A.N.C. Over-Ear Bluetooth Headphones vs Sennheiser MOMENTUM 4 Wireless Headphones

ANC is consistently described as solid to above average and improved versus the prior model, but most sources still place it behind top-tier Bose or Sony performance. You can adjust ANC strength in the app and set how the ANC button cycles modes; the common complaint is the lack of true adaptive ANC that auto-adjusts for you.

ANC effectiveness is mixed across sources: some call it very good and close to leaders, while others measure it as clearly behind top Bose and Sony options, especially for tougher noise scenarios. ANC adjustability is widely praised thanks to sliders, adaptive behavior, and app-driven profiles and zones that let you tune isolation versus awareness.

Android support is good for basics (pairing features, LE Audio readiness), but Android users who want aptX or LDAC will find those codecs missing.

The Marshall app is generally well-liked for being clean and functional, giving access to firmware, EQ, ANC levels, control customization, and battery-care features.

The Smart Control app is widely viewed as feature-rich with EQ and zone-based behavior, but some reviewers dislike setup friction, pop-ups, or account requirements for certain features.

Reviews that address aptX note it is not supported, which can be a downside for some Android users.

aptX support is a notable plus cited by several reviews, helping Android users with more consistent performance compared to AAC in many setups.

Some reviewers flag potential latency for gaming because low-latency Bluetooth codecs are missing; wired USB-C listening is the safer option when sync matters.

Audio-video sync is generally reported as strong for video watching, with latency management helped by codec selection in some advice-focused reviews.

Bass hits with satisfying punch and extension for most listeners, but it is not a true bass-cannon and some reviewers want a stronger bass-boost or tighter control.

Bass is commonly described as elevated and impactful without constant bleed, but several reviewers note it can be a bit much stock and may benefit from EQ to reduce boom or flab in some tracks.

Battery life is the headline feature: 70 hours with ANC on and up to 100 hours with ANC off is repeatedly highlighted and often backed up by real-world use. The battery is not generally described as user-replaceable; Marshall instead focuses on battery preservation settings to help extend lifespan.

Battery life is the most consistent standout: multiple sources cite roughly 50 to 60 hours or more with ANC depending on test methods and usage.

Bluetooth stability is generally reliable in daily use, with Bluetooth 5.3 and LE Audio readiness mentioned and few drop-out complaints.

Bluetooth stability is generally solid with modern connectivity, though real-world reliability can still depend on device ecosystem and nearby previously paired devices.

Build quality is generally rugged and travel-ready with an emphasis on durability and repairability, though a few sources mention minor creaks or quirks.

Build quality is typically seen as solid but more plastic-heavy and less premium-feeling than metal-rich rivals; durability is considered fine with reasonable care.

The multi-directional control knob and dedicated buttons are widely praised as intuitive, tactile, and easier to use than touch controls.

The single physical power and pairing control is sometimes criticized as finicky or confusing compared to simpler button-driven systems.

Cable quality and design are serviceable, with included cables for charging and wired use, but some miss the older coiled cable style or find adapters less convenient.

One review criticizes the included analog cable as thin and less confidence-inspiring for travel wear and tear.

The included hard case gets high marks for protection and premium feel (velvet interior, compact footprint), though a few find it thick or bulgy.

The carry case is usually praised as protective with storage for cables, but a few reviews call it larger than ideal for pack-light travel.

Charging is fast and convenient via USB-C, with common claims of about 12 hours of playback from a short charge and full recharge around a couple of hours.

Charging is generally strong, with quick-charge claims and reasonable full-charge times; experiences vary slightly by power source and usage.

Clamping force is generally light, with multiple reviewers reporting minimal pressure and little to no head squeeze.

Clamp force is often described as moderate and comfortable, but the lighter clamp can trade off with stability during movement-heavy activities.

Codec support is basic for the price: SBC and AAC are the norm, with some mentions of LE Audio/LC3, but there is no mainstream hi-res Bluetooth path.

Codec support is strong for mainstream and Android use, including multiple aptX options and AAC, but it is not positioned around newer lossless Bluetooth standards.

Long-session comfort is a standout: low weight, plush pads, and pressure-distributing headband design earn frequent praise, with only occasional complaints about heat buildup.

Comfort is frequently described as excellent, including long sessions and glasses-friendly padding, though a few users report headband pressure or fit quirks during extreme-length wear.

Design is classic Marshall amp-inspired with textured finishes and brass/gold accents; it feels premium to fans but can be polarizing for those who prefer modern styling.

Design is commonly described as minimalist and understated; some like the clean look while others miss the more distinctive style of earlier Momentum models.

Earcup padding is repeatedly described as very plush and supportive, improving seal and comfort, though it can feel warm over extended wear.

Earpads are commonly described as soft and comfortable, contributing to long-wear comfort; the softer seal may slightly reduce isolation for some.

Multiple reviews mention wide swivel/rotation and folding behavior that helps the headphones sit flat, pack smaller, and fit securely into the compact case.

Earcup rotation is praised in at least one review as smooth and helpful for fit, with cups lying flat for storage and neck rest.

The 5-band EQ is responsive and helpful for tailoring the signature sound, though it is not as granular as more advanced EQ systems.

EQ customization is a meaningful strength across reviews, commonly used to tame bass, refine mids, or personalize the overall signature without major distortion issues.

Find My style tracking is described as lacking compared to Apple ecosystem features in at least one review.

Measurements and listening impressions generally align on a well-tuned response for broad appeal, with small deviations (notably bass lift) that can be refined via EQ.

Adjustment and fit mechanisms are practical, with discrete steps and a comfort strap/headband design that helps distribute pressure and maintain a stable seal.

Fit and adjustability are generally straightforward, though users are advised not to over-tighten because pressure points can develop.

Hinges and structure are often described as bendy and durable, but at least one review notes odd twisting behavior when you turn your head.

Included accessories are typically strong for the category: a hard case plus cables for charging and USB-C-to-3.5mm wired listening are commonly noted.

Accessories are generally generous, commonly including a case, charging cable, analog cable, and an airplane adapter, though one review notes a missing adapter compared to the prior generation.

Instrument separation is typically above average with clear placement, but layering can compress or get congested as mixes get busier.

Instrument separation and imaging are commonly rated as strong for the category, with clear placement and good stereo definition, though not always a large leap over prior models.

Reviews that address LDAC note it is not supported, reinforcing that these prioritize battery life and simplicity over hi-res wireless codecs.

LDAC is not supported and is repeatedly mentioned as the key wireless hi-res omission for enthusiasts.

At higher volumes, many report clean playback with little obvious distortion, though a few note dynamic compression or a ceiling that flattens crescendos.

Even when pushed loud, multiple reviews note the sound stays clean, but the practical ceiling can feel lower than expected compared to peers.

Noise handling on calls is a relative strength, with several tests showing good wind and background-noise suppression, though a few note it can still struggle in very noisy offices.

Noise rejection for calls is a frequent criticism, with several reviews noting background sounds can intrude; wind reduction features can help in some cases.

Call quality ranges from clear in quiet environments to merely decent in louder settings; it is generally usable for everyday calls but not always meeting-grade.

Call quality trends average-to-good in quiet rooms, but multiple tests report reduced clarity and competitiveness when background noise is present.

Midrange is generally strong for guitars and vocals, though some note either a slight mid dip (snare/vocals) or occasional mid-forward congestion on busy tracks.

Midrange is generally clear, but some reviews call it less rich than Momentum 3 or slightly recessed depending on tuning, with vocals still remaining clean and present for most listeners.

Multipoint is widely reported to work well for two devices, though some wish for a device-management list and note occasional confusion when mixing wired and Bluetooth sources.

Multipoint is supported and often convenient, but at least one lab test reports occasional glitches when other known devices are nearby, even though switching can be quick once connected.

Passive isolation is strong thanks to a very good seal from the pads, helping block higher-frequency noise even before ANC is enabled.

Passive isolation is a recurring weak point in several lab-style reviews, sometimes attributed to a softer seal; others find it adequate in real travel use.

Portability is excellent: the cups swivel/fold and the headphones collapse into a very compact shape that fits a small travel case.

Portability is good but not best-in-class: cups lie flat and cases can be compact versus some rivals, yet the design does not fully fold into the headband in some reports.

Preset EQ profiles are useful and easy to swap, with bass-boost and other tonal shifts helping different genres, though a few reviewers find boosts could go further.

Preset modes and guided personalization features are generally useful and can improve tonality for specific tastes, though some presets may limit manual slider control.

Replaceable earpads are a strong point, with twist-off pads that are easy to remove and swap, supporting long-term maintenance.

Wear detection is available for auto play/pause, but experiences vary from fine to slightly slow or occasionally over-sensitive; it can usually be disabled.

Wear sensors and auto pause features are frequently mentioned as useful quality-of-life additions, though auto power behaviors can be inconsistent for some users.

Sidetone is praised in at least one review for making calls feel more natural by letting you hear your own voice more clearly.

Surface smudging is mentioned as manageable: oils can show with regular handling but a quick wipe restores a clean look.

Setup is straightforward and the app layout is easy to navigate, but some reviewers note missing premium conveniences like adaptive ANC behavior or deeper device management.

Setup and daily control are generally easy once configured, but a few reviewers report initial friction in the app experience or connection steps.

Across reviews, sound is lively and engaging with a clear lean toward rock-focused tuning, but it stays enjoyable for many genres once EQ is applied. Wired listening works via USB-C using the included cable and is often described as clean and low-latency, but convenience varies because there is no built-in 3.5mm jack and some report you may need power for wired use.

Sound quality is a consistent highlight: most reviews describe an engaging, detailed presentation that competes strongly at the price, often with a fun, slightly bass-forward tilt and strong clarity after light EQ if desired. Wired audio can sound tighter and more stable than Bluetooth in some reports, but at least one review warns wired listening can degrade significantly if the headphones are not powered on.

Soundstage is decent for a closed-back ANC headphone but not the widest; some tracks can feel narrow or cluttered unless you use the Soundstage processing.

Soundstage is usually described as wide enough for an immersive feel, but depth can be limited and some tests describe the stage as more inside-the-cups than truly expansive.

Soundstage/spatial processing is a fun extra with adjustable room feel, but most agree it is not true immersive spatial audio and can sound synthetic on some tracks.

Spatial audio support is not a core strength in these reviews, with some calling it limited or weaker than ecosystem-driven alternatives.

Fit stability can be a weakness during vigorous movement due to moderate clamping, with at least one test noting issues beyond walking.

Several reviews highlight recycled or sustainability-minded materials, positioning these as more eco-considerate than many direct rivals.

Sustainability gets a small nod through minimalist, paper-forward packaging in at least one review, though it is not a dominant theme.

Touch controls are often described as intuitive and capable, but several reviews mention sensitivity, accidental triggers, or occasional glitches requiring app toggles.

Transparency mode is usable and adjustable, but opinions vary: some find it natural and clear, while others notice hiss and weaker reproduction of deeper voices.

Transparency is adjustable and generally usable, but opinions vary: some like the control and naturalness, while others find it less crisp or overly amplified in busy spaces.

Treble is crisp and energetic, yet several reviews mention brightness, sibilance, or fatigue on higher notes unless you tame it with EQ.

Treble is frequently praised for detail and shimmer, though a few reviewers mention occasional brightness, fatigue, or a sharper peak that may bother treble-sensitive listeners.

USB-C is the single physical port for charging and wired audio, which keeps things simple but also means no dedicated 3.5mm jack.

USB-C is a key advantage: reviews highlight charging convenience and USB-C audio as a rare, practical feature for wired listening.

Voice assistant access is supported through the customizable button and app settings, making it easy to trigger assistants or shortcuts without touching your phone.

The headphones get loud without needing extreme volume, with multiple reviewers noting comfortable listening well below 100% volume.

Volume output is sometimes reported as lower than competing flagships, leading some users to run near the top of the volume range.

There is no stated water or sweat resistance rating in the reviews, so these are best kept away from rain and workouts.

Water resistance is effectively absent in practice: at least one review notes no IP rating and recommends avoiding rain.

Weight is consistently called light for the class (around the mid-200g range), contributing strongly to comfort and portability.

Weight is typically reported around the 290g range and perceived as manageable, though not the lightest in class and still a factor for ultra-long sessions for some users.