Compare Marshall Monitor III A.N.C. Over-Ear Bluetooth Headphones vs Beyerdynamic Aventho 300 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 performance ranges from decent to underwhelming for the price; it tends to handle low-frequency rumble better than mid and high-frequency noise, and trails class leaders. ANC settings are flexible, with multiple strength levels (and an adaptive mode) available via the app and on-headphone controls.

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

Android use is generally smooth, with modern codecs and stable pairing frequently mentioned as benefits for Android users.

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 companion app is typically seen as clean and easy to navigate, though not feature-rich compared with the very best ecosystems.

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

aptX support (including Lossless/Adaptive) is repeatedly cited as a key advantage, especially for Android and Snapdragon Sound users.

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.

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 a defining trait: commonly thick and boosted with good extension, but several reviewers call it boomy or overdone until EQ is applied.

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 a headline strength: many cite around 50 hours with ANC on, and some tests report substantially higher real-world endurance.

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 a strong point in most reviews, with few dropouts reported and Bluetooth 5.4 frequently highlighted.

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 consistently highlighted, with metal components and a sturdy, low-creak feel that compares favorably to many all-plastic competitors.

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

Physical buttons get mixed feedback: some find them small, mushy, or hard to distinguish by feel, while others report they work fine once learned.

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.

Accessories include both USB-C and 3.5mm cables (plus an adapter in several reviews) and are generally viewed as solid and practical.

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 frequently praised as premium and protective, and several reviewers like that a soft pouch or dust bag is also included.

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 over USB-C is straightforward, with fast-charge claims around 10 minutes for roughly 5 hours and full-charge times around two hours.

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

Clamping force often skews tight, which helps stability and seal but can become fatiguing for larger heads.

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 a standout, commonly noted for including AAC plus higher-end options like aptX Lossless, aptX Adaptive, and LE Audio.

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.

Long-session comfort is divisive: some find the fit pleasant, while others report discomfort after an hour or two due to clamp, heat, or ear clearance.

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 generally seen as sleek and premium-looking, leaning understated rather than flashy; finish impressions vary from fingerprint-resistant to smudge-prone.

Detachable wired options add flexibility for travel, low-latency use, and compatibility with sources that cannot use Bluetooth.

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

Pads are described as plush by some and stiff or shallow by others; deeper cups help, but heat build-up and ear contact show up in multiple accounts.

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

Cup swivel and articulation are well regarded, allowing the headphones to lay flatter and fit a range of head shapes; a few note minor rocking from pad shape.

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 options center on a 5-band equalizer and presets; many appreciate the control, but measurement-focused reviewers argue it is not granular enough to correct all issues.

Frequency balance is polarizing: some call it even-handed, while measurement-driven reviews point to large deviations (bass and treble boosts and a vocal region dip).

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

Adjustment mechanisms are generally praised for feeling secure and premium, including ratcheting steps that hold position well.

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

Hinges and joints are widely described as robust, with metal hardware that inspires confidence in long-term durability.

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.

Included accessories are strong for the price, often including a hard case, soft pouch or bag, USB-C cable, USB-A adapter, and a 3.5mm cable.

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

Imaging and separation are consistently strong, helping instruments stay distinct even when the overall frequency balance is debated.

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

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

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 reduction for the mic is serviceable but not elite; wind and traffic can still be audible unless you speak up.

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 mic quality is usually fine in quiet conditions, but clarity drops in noisier streets or windy situations compared with the best phone-call headphones.

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 quality is mixed: some hear warm, impressive mids, while others report recessed vocals or slightly unnatural timbre depending on tracks and tuning.

Multi-device compatibility is a plus, spanning phones and computers and supported by both multipoint Bluetooth and wired inputs.

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 generally works reliably, but usability varies: some note the app does not show connected devices or make switching as effortless as certain rivals.

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 benefits from a solid seal, but it does not fully replace top-tier ANC in louder environments.

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

Most reviews describe foldability that fits the headphones into a protective case, though at least one comparison notes limited folding for ultra-compact packing.

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 profiles like Neutral or Smooth can be genuinely useful for dialing back bass or treble, though some report changes in perceived loudness when toggling EQ.

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

Replaceable earpads (and sometimes the headband) are called out as a longevity-friendly design choice.

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-detection sensors support auto pause and resume; behavior can be a little too eager for some, but the feature set is generally appreciated.

Sidetone is available and adjustable, which can help calls for some users even if others prefer it turned off.

Smudge resistance depends on finish and handling: some report minimal fingerprints, while others notice visible marks with regular contact.

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 is typically painless, with straightforward pairing and a simple app layout; firmware updates are reported as quick and uncomplicated.

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.

Reviews disagree on the overall sound: many praise a warm, detailed, spacious presentation, while others criticize the stock tuning as overly colored and not reference-like. Wired listening via 3.5mm and USB-C is a valued feature; some reviewers prefer the USB-C wired mode for extra clarity and dynamics.

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 frequently described as wide and immersive, with an enveloping presentation; some report even better clarity and space when listening wired over USB-C.

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.

Dolby Atmos and head tracking are a major feature: some find the effect subtle and well executed, while others dislike the tonal shift or report jumpy tracking behavior.

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

Touch controls are usually accurate and easy to learn, with occasional accidental triggers or misfires while moving or when handling the headphones.

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 mode is adjustable and generally useful, though some find the highest setting overly sharp or bright in the upper frequencies.

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

Treble is generally clear and energetic, but can bring sibilance or harshness for sensitive listeners; a few note slight top-end roll-off or prefer EQ to smooth it.

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 used for charging and, in several reviews, for wired audio playback, adding versatility beyond standard Bluetooth 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 headroom is ample, with multiple reviewers noting the headphones get very loud without obvious strain at typical listening levels.

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

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

At roughly 319g, weight is noticeable for some listeners and is part of the comfort complaints, though others still consider it manageable.