Compare Marshall Monitor III A.N.C. Over-Ear Bluetooth Headphones vs Focal Bathys MG Wireless Headphones

The lack of a built-in 3.5mm analog jack was a repeated drawback, even though USB-C-to-3.5mm wired listening is possible.

The 3.5mm analog input is valued as a rare, useful wired option in a premium wireless headphone.

ANC was usually judged good, solid, or decent for daily use, but several reviewers said it still trails Bose, Sony, or the top tier.

ANC is judged useful and improved, but not class-leading; reviewers say it reduces buses, traffic and office noise while still letting some voices or mids through.

Advanced software features were considered solid and modern, but reviewers did not see them as uniquely class-leading.

Advanced software features are a limitation because the app and EQ are simpler than richer rival ecosystems.

Aesthetics were distinctive and often praised, but some reviewers noted the retro Marshall look will not suit everyone.

The profile is not very discreet for everyone; one review explicitly says the styling may be too flashy.

ANC background noise performance was decent: one review measured strong overall noise reduction, and another said white noise was not bad.

ANC background noise is a positive in the scored review because revised microphones are said to reduce unwanted hiss.

ANC-off listening measured slightly better in one review, suggesting ANC can subtly affect the sound signature.

ANC mode changes are praised for preserving the sound signature, with multiple reviewers saying the sound remains stable across Silent, Soft and Transparency.

ANC slightly affects audio performance, with one review noting higher sound-quality scores when ANC is disabled.

ANC has little to no negative effect on audio in several reviews, which praise the stable tuning and absence of sonic changes between modes.

Android compatibility was positive in one review that found the headphones sounded good on Android.

The app was viewed positively for customization, controls, battery options, and a generally intuitive experience.

The app receives mixed marks: some reviewers find it solid or useful, while others describe it as limited, brief, glitchy or dependent on personalization.

aptX support was criticized as absent, especially for Android or lossless-codec users.

aptX support is treated positively in one review because it works well alongside multipoint, but it does not erase broader codec complaints.

Audio-video sync was a concern for gaming because one reviewer tied the lack of low-latency codecs to more noticeable latency.

Auracast support was treated as a positive future-facing feature, especially for Android and LE Audio readiness.

Auracast support is a weakness because one review explicitly notes that the Bathys MG goes without it despite cheaper rivals adopting newer wireless features.

Auto-play and wear detection worked but was slow to react in one test.

Bass was usually described as punchy or well-balanced, though several reviewers said it could use more impact, cleaner control, or stronger low-end weight.

Bass is broadly praised for depth, control, impact and texture, though several reviewers note that default tuning can sound boomy, swollen or resonant before EQ or depending on music.

Battery life had the strongest agreement: reviewers repeatedly described it as class-leading, incredible, extraordinary, or far ahead of competitors.

Battery life is polarizing: many reviewers find 30-plus hours practical or impressive, but others call it disappointing for the premium price.

Bluetooth performance was praised in one review as stable and high-performance.

Bluetooth performance is generally solid with fast pairing and good aptX Adaptive performance, but reviewers criticize the version and feature set for not being cutting-edge.

Bluetooth version support was tied to a stable, high-performance wireless connection in one review.

Bluetooth version is a weakness at this price, with reviewers noting that 5.2 is improved but not the latest standard.

Build quality was generally strong and rugged, with praise for durability and materials, offset by one report of creaking.

Build quality is consistently praised, with reviewers calling the construction premium, flawless, sturdy and made from high-quality materials.

Hi-res playback support was a weakness because reviewers repeatedly noted no hi-res Bluetooth audio support.

The built-in DAC and hi-res playback mode are among the most praised features, repeatedly described as excellent, useful and a major reason to consider the headphones.

Button controls were a standout strength, with reviewers preferring the tactile joystick and physical buttons over touch controls.

Physical controls are preferred over touch by one reviewer, but another notes the small buttons can be difficult to locate by feel.

Cable quality received praise in one review for the black cable with brass tips and premium-feeling presentation.

Cable quality is mixed: some reviewers call the included cables acceptable or durable, while another says they are basic and lack premium extras.

The carry case was usually praised as sturdy, compact, premium, or travel-friendly, though a few reviewers found it bulky or unnecessary.

The carrying case is mostly praised as protective, slim and practical, though one reviewer finds it less premium than some competitors’ cases.

Charging was praised for fast top-ups, with reviewers citing up to 12 hours of playback from a short charge.

Charging is well received because quick charging reliably adds several hours of playback in about 15 minutes and one reviewer calls charging very fast.

Clamping comfort was rated very highly, with reviewers reporting little to virtually zero pressure.

Clamping force is generally comfortable and improved versus the original Bathys, with reviewers describing less pressure and a secure but not punishing fit.

Codec support was a clear weakness because reviewers noted no hi-res, lossless, or low-latency codec support.

Codec support is viewed as adequate rather than premium; aptX Adaptive helps, but reviewers repeatedly criticize the lack of broader high-end codec support.

Comfort was one of the strongest consensus wins, with reviewers repeatedly praising all-day wear, soft fit, and low fatigue.

Comfort is a strong point, with reviewers repeatedly reporting long-session wearability, softer pads and better weight distribution despite the headphone’s size.

Connectivity options were mixed: wired and wireless playback were useful, but the lack of a built-in 3.5mm jack and coiled cable hurt convenience.

Connectivity options are a major strength, with reviewers praising the combination of Bluetooth, USB-DAC and wired listening flexibility.

Design and aesthetics were mostly praised for the distinctive Marshall look, premium detailing, and rugged styling, though taste varied.

Design earns strong praise for its chestnut/bronze luxury look, premium styling and distinctive Focal identity, though one review says the look may be too flashy.

Durability over time was viewed positively because reviewers described more durable, repairable construction and long-term toughness.

Durability impressions are positive, with reviewers citing sturdy construction, durable materials and design choices that feel built to last.

Ear cup padding was widely praised as extremely soft, plush, pillow-like, and important to comfort and sealing.

Earpad quality is praised for softness, compliance and plushness, though the more compliant pads may let some larger ears brush the inner baffle.

Ear cup rotation and swivel helped portability, though one reviewer found the twisting mechanism odd on the head.

Earpad/body-borne noise was a notable negative for one reviewer, who heard footsteps and heartbeat-like sounds.

Earpad or cup movement noise is a drawback in one review, which reports a soft thumping sound while running.

EQ customization was broadly useful and responsive, though one reviewer wanted more precision than the five-band setup provides.

EQ customization is helpful but limited; reviewers like the usable bands and bass adjustment, while several wish for deeper or parametric control.

Features at launch were adequate but not standout, with one reviewer saying the standard feature set lacked a truly distinctive tool.

The default frequency response was judged broadly listener-friendly, especially for casual listeners.

Frequency response is praised for smoothness and coherence, especially in Dynamic mode, though default tuning can add coloration in the lower mids and treble.

Headband adjustability earned a small positive note for visible adjustment numbering.

Headband comfort was praised for reducing top-of-head pressure through light weight and support-strap design.

Headband padding is viewed positively in the one scored review, which links the revised foam to better comfort.

Hinge durability was praised for being able to twist without showing signs of breaking.

Immersive audio quality was mixed, with some reviewers enjoying the added atmosphere and others finding the effect limited or not truly immersive.

Immersive audio quality is praised in the scored review, which describes an expansive, three-dimensional presentation.

Included accessories received praise for the attractive red-velvet case and included cables.

Included accessories are basic: one reviewer notes the lack of flight adapters, mic cable or special extras.

Instrument separation was a consistent strength when mentioned, with reviewers noting solid layering, instrument placement, and separation across bass, mids, and highs.

Reviewers praise instrument separation, imaging and placement, often saying the Bathys MG reveals layers, positions instruments clearly and keeps complex mixes organized.

Integrated microphone feedback was mixed, with clear/crisp quiet-room results but criticism of vocal clarity or noisy-environment performance.

The integrated microphones are considered effective enough for calls in the scored review, though call quality is not treated as a headline feature.

LDAC was only discussed as an absent higher-quality codec, making it a codec-support weakness.

LDAC is a repeated missing feature, with reviewers saying it should have been included at this price even if not everyone thinks it would transform sound quality.

LE Audio readiness was treated as a positive future-proofing feature by multiple reviewers.

LE Audio readiness is weak because reviewers specifically call out the absence of Bluetooth LE, LC3 or related newer wireless standards.

Maximum-volume clarity was strong in the reviews that addressed it, with no audible or max-volume distortion reported.

One reviewer warns that very loud playback or sharp recordings can expose the treble response, limiting clarity at big volumes.

Microphone noise reduction was praised for handling simulated or real wind well, despite some vocal-clarity caveats elsewhere.

Microphone noise reduction is serviceable and sometimes praised for reducing disruption or hiss, but wind and high-pitched noise still leak through in one review.

Call microphone quality received strong praise from one reviewer, especially for windy phone calls.

Call quality is considered good to very good, with voices remaining clear in typical environments, though not always as noise-free as top call-focused rivals.

Midrange impressions were mixed: some praised vocals and instruments, while others heard under-emphasized mids, prominent high mids, or occasional clutter.

The midrange is a major strength in most reviews, with vocals, guitars, piano and instruments described as clearer, more powerful and more nuanced than on the original model; one reviewer found vocals somewhat suppressed.

Multi-platform compatibility was positive where tested on both iOS and Android.

Multi-platform compatibility is a strength in the scored review because the headphones are described as working across virtually every listening situation.

Multipoint reliability was strong where tested, with seamless switching or extremely reliable two-device use.

Multipoint is appreciated when it works, but reviewer experience is mixed: some describe seamless switching while others report quirks when moving back to a phone.

Passive isolation was praised for the soft cushions and seal, which helped block noise even before ANC was considered.

Overall recommendations were positive but caveated: reviewers liked the package, especially for travel and rock-focused listening, while noting ANC, codecs, and wired tradeoffs.

Overall recommendations are strongly positive for buyers prioritizing sound, comfort and luxury, while reviewers still caution about price and feature gaps.

Portability and foldability were major strengths thanks to the compact folding design and small travel footprint.

Portability is limited by the fold-flat-only design, even though some reviewers find the case slimmer or easier to pack than expected.

Premium feel was praised through richer materials, superior build impressions, and a luxurious presentation.

Premium feel is a major strength, with reviewers describing the product as looking and feeling premium, luxurious and more refined.

The preset EQ experience was praised in one review, especially the bass boost setting for adding dynamic sound without excess bass.

Preset EQ profiles, especially Dynamic mode, are a notable strength for reviewers seeking a more balanced or Harman-like sound signature.

Replaceable earpads were praised as easy to remove or replace and useful for longevity.

Replaceable earpads get a mixed mark because removability is welcome, but one review criticizes the lack of included replacement pads.

Replaceable pads and headband parts were a repairability plus where described.

Lighting customization is present but not universally valued; one review calls the logo light show unnecessary on expensive headphones.

Sensor performance was a concern because one reviewer reported random wear-sensor triggers.

Smart listening features were mixed: adaptive volume, Spotify Tap, and battery preservation drew praise, while missing convenience features held the score down.

Smart listening features are valued mainly through Mimi personalization, which reviewers say can improve or tailor sound effectively.

Smart Pause performance was criticized for random triggering in one longer test.

Setup simplicity received praise from one reviewer who called pairing/setup easy.

Setup simplicity is positive in one review, which says the app made it easy to set the headphones up as desired.

Sound leakage was viewed positively in one review because the plush ear cups helped minimize leak.

Reviewers generally liked the sound, describing it as pleasing, energetic, balanced, or excellent, with the strongest praise for rock and instrument-driven listening.

Reviewers consistently describe the Bathys MG as one of the best-sounding wireless ANC headphones, with especially strong praise for its richer, more energetic presentation versus the original Bathys.

Soundstage width drew mixed reactions, from solid or opened-up presentation to narrow, cluttered, or not true-spatial enough.

Soundstage is repeatedly described as spacious for a closed-back wireless headphone, with good depth and immersion, though a few reviewers note it remains somewhat intimate rather than speaker-like.

Spatial audio was divisive: some liked the extra space, but others found it unnatural, underwhelming, or below true Atmos-style experiences.

Connection stability was praised as stable and high-performance in one review.

Stability is mixed for mobile use because one reviewer reports annoying ANC inconsistency when walking outdoors.

Streaming service integration was praised strongly for Spotify Tap, especially for starting playback without pulling out a phone.

Sustainability and repairability were praised for replaceable parts and repair-minded design, with a caveat that batteries are not user-replaceable.

Sustainability materials received a modest positive note for recycled plastic use.

Sustainability materials receive a positive note for the FSC-certified bamboo pulp packaging material.

Transparency mode was considered usable and sometimes natural, but reviewers also noted hiss, limited realism, or weaker performance than the best rivals.

Transparency mode is generally considered effective, making conversations and surroundings audible without removing the headphones.

Travel friendliness was a major strength due to battery life, compact folding, wired flexibility, and protective case design.

Travel friendliness is mixed: the slimmer case, DAC convenience and long battery help, but the fold-flat form and case size still limit portability.

Treble feedback was split between clear, impressive highs and complaints about sibilance, fatigue, or sharpness on some tracks.

Treble earns mostly positive marks for clarity, shimmer and smoothness, but some reviewers hear occasional sharpness, edge or fatigue with bright recordings or high volumes.

USB-C was useful for charging and wired listening, but reviewers criticized the one-port limitation and need for power in wired use.

Value was generally fair to good, especially on sale, but reviewers noted strong cheaper or better-performing rivals.

Value is debated: reviewers admire the performance and luxury, but the high price, smaller upgrade over the original and missing features make value context-dependent.

Voice assistant integration is present and broadly supported through major assistants, with no major quality complaints in the scored review.

Voice prompts and feedback added personality through Marshall-style guitar sounds during power and pairing.

Voice prompts and feedback are mixed: one reviewer wants clearer ANC mode announcements, while another likes the refined connection sounds.

One reviewer found the headphones plenty loud, with comfortable listening volume well below maximum.

The smaller 3dB volume increments are viewed as a meaningful usability upgrade that helps listeners hit a more precise level.

Water and sweat resistance was a weakness because reviewers noted the headphones are not waterproof and should avoid rain or gym use.

Wear detection auto-pause was only moderately successful, working but reacting slowly.

Wear detection performance was a weakness in one longer test because the sensor randomly triggered.

Weight comfort was a major strength, with reviewers repeatedly calling the headphones light for the class and easy to wear.

Weight comfort is the one weaker comfort note: the headphones are manageable on-head, but one review says their heft is noticeable in-hand.

Wind handling was mixed: one reviewer found wind susceptibility in ANC/transparency, while another found moderate wind manageable.

Wind noise handling is only average, with one review noting that wind and high-pitched noise pass through more easily than on Sony’s class leader.