Compare 1MORE SonoFlow-Pro Headphones vs Marshall Monitor III A.N.C. Over-Ear Bluetooth Headphones

Analog input was useful, especially for wired listening and ANC while wired, but the nonstandard 2.5mm headphone-side jack hurt convenience.

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.

ANC was a major strength for the price, often effective for commutes and low-frequency noise, but several reviewers found it short of premium or inconsistent in harder environments.

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

Advanced software features were mixed, with spatial audio earning some praise but smart burn-in dismissed as not meaningfully changing sound.

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

The discreet profile was praised for clean, subtle looks that avoid drawing attention in public.

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

ANC background noise was usually low, with reviewers noting little hiss or only modest white noise.

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

ANC sound-signature impact was a concern because reviewers heard bass increase, audio blanking, or muddier sound depending on mode.

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

ANC's effect on audio was inconsistent: one reviewer heard no distortion, while others reported blanking or lost detail with ANC on.

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

Android compatibility was hurt by one reviewer’s inability to get LDAC working on tested Android phones.

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

The app divided reviewers: some found it useful and straightforward, while others reported unclear app choice, unreliability, lag, or hidden settings.

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

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

Audio-video sync was mostly strong, with reviewers reporting no significant delay or useful low-latency behavior, though one still preferred AirPods Pro latency.

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.

Auto-play or wear-detection absence was treated as a missed opportunity for a Pro model.

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

Auto on/off reliability was weak because one reviewer missed automatic power behavior and reported accidental battery drain.

Bass was usually praised as deep, warm, punchy, and controlled, though several reviewers felt it could color the mix or become less clean than the original.

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.

Battery life was the strongest consensus point, repeatedly described as exceptional, class-leading, anxiety-free, and among the best in the category.

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

Bluetooth performance was generally reliable and stable, with praise for range and connection quality across several reviews.

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

The newer Bluetooth version was praised as a meaningful upgrade for stronger, more efficient connectivity.

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

Build quality was mixed: some praised rigidity and solidity, while others found plastic, feeble, creaky, or only okay construction.

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

Wired/DAC and hi-res playback impressions were positive overall, especially when wired playback sounded better and the built-in DAC was praised.

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

Physical controls were generally usable and clicky, though some reviewers called them plasticky, awkwardly placed, or not customizable enough.

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

Cable quality and cable choice were common weak points because the included/nonstandard 2.5mm-to-3.5mm approach frustrated multiple reviewers.

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

Case quality was generally appreciated, especially for the price, but some reviewers disliked the simpler Pro case and missing cable pouch.

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

Charging feedback was positive, with fast-charge claims and measured charge times viewed as convenient and strong for travel use.

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

Clamp comfort was mostly acceptable to good, with light pressure helping comfort but some reviewers noting greater clamp or a slightly loose feel.

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

Codec support was viewed positively for LDAC/high-res capability, though the strongest codec comments focused on support rather than broad codec breadth.

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

Comfort was one of the strongest themes, with many reviewers reporting long sessions, all-day fit, light wear, and little fatigue.

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

Connectivity options were strong overall, especially wired use, headphone-jack fallback, and ANC while wired in some testing.

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.

Design reactions were mostly positive for clean, sleek, understated looks, but some wanted more flourish or a more premium Pro identity.

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

The detachable cable setup was considered less convenient because reviewers wanted a standard 3.5mm-to-3.5mm cable rather than the supplied nonstandard option.

Dolby/head-tracking-style audio was limited because one reviewer said the spatial effect was not true head tracking like AirPods Max.

Long-term durability remained uncertain, with one reviewer specifically questioning whether the plastic build would last.

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

Ear cup padding was usually praised as plush, breathable, or deeply cushioned, though one reviewer found the thicker pleather pads sweaty.

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

The swivel/folding ear-cup design helped the headphones pack smaller for commuting and travel.

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.

Ecosystem integration was limited compared with Apple-style multi-device behavior, according to one reviewer used to that ecosystem.

EQ customization was a clear plus, with multiple reviewers appreciating adjustable EQ and presets for shaping the sound.

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

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

Frequency-response comments were moderate, with cohesive, smooth output offset by limited high-end extension and resolution.

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

Headband adjustability was praised for accommodating larger heads comfortably.

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

Headband padding was a comfort highlight, with reviewers praising the generous padding across the top of the headband.

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

Hinge impressions were mixed but leaned positive: one review praised the solid lock, another heard creak, and another found the Pro significantly improved.

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

Immersive audio was praised in one review for making music feel like it came from speakers in front of the listener.

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

Included accessories were considered adequate to strong, especially the hard carry case and bundled cables.

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

Instrument separation was acceptable to good for the price, but reviewers still noted limited air, spacing, and occasional muddiness from bass.

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

The integrated microphone was serviceable, with acceptable voice pickup and better-than-expected clarity, but not a standout.

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

LDAC was polarizing: one reviewer praised the added detail, while another could not get LDAC working on tested Android phones.

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

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

Maximum-volume clarity was mostly solid, but not unanimous; some found clean playback at higher levels, while one heard the headset lose composure around higher gain.

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

Microphone noise reduction was useful in moderate conditions, but reviewers still heard background sound, wind effects, or less-than-clean processing.

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

Call microphone quality landed around serviceable to good, with clear enough speech but occasional sibilance, underwater tone, wind weakness, or budget-headset limits.

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

Midrange comments were mixed: some heard clear vocals and big mids, while others found the range recessed, less present, or merely acceptable.

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

Multi-platform compatibility was good in one review, with laptop-and-phone use working without settings-menu friction.

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

Multipoint was useful when it worked, but setup and reliability were mixed, with hidden menus, experimental status, and occasional mediocre switching.

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

Passive isolation was considered good, helped by the over-ear cushions and fit, adding useful natural noise blocking before ANC.

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

Overall recommendation was strongly positive for budget buyers, with reviewers repeatedly calling the headphones a respectable, high-value, or best-in-class cheap option.

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

Foldability and portability were strong, with reviewers appreciating the compact folding design and travel-friendly form.

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

Premium feel was a weakness, with reviewers noting cheaper plastic/case impressions and an unimpressive feel out of the box.

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

Preset EQ quality was not universally loved; one reviewer found the branded presets skippable despite liking custom EQ.

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

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

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

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

Smart listening extras were present and somewhat useful, though the strongest praise was for the app-level convenience rather than transformative performance.

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

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

Software/setup simplicity was criticized when app LDAC switching and command delays caused major slowdowns.

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

Sound leakage was excellent, with reviewers reporting minimal leakage.

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

Reviewers broadly liked the sound for the price, calling it clear, fun, or surprisingly close to pricier rivals, while noting it remains short of truly premium detail.

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

Soundstage split reviewers, with one hearing a wide stage while others described it as narrow, shallow, or less spacious than pricier headphones.

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

Spatial audio was mixed: some found it airy or impressively speaker-like, while another recommended turning it off due to quality tradeoffs.

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

Fit stability was praised in one review, where head shaking did not move the headphones much.

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

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

Sustainability and repairability drew criticism, centered on the need for better sustainable packaging design.

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

Sustainability materials were criticized because the packaging still included plastic wrapping.

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

Transparency mode was usable and sometimes very good, but not consistently natural; reviewers also noted hiss, muffling, or only okay voice pickup.

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

Travel friendliness was a strong fit because reviewers liked the lightweight, folding build and included case for trips.

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

Treble was generally clean enough, with praise for non-tinny highs and crisp solos, but some reviewers wanted more energy, sparkle, or extension.

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

USB-C was a mixed point because charging was available, but one reviewer wanted USB-C audio mode and scored that missing use case as a drawback.

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

Value for money was one of the strongest areas, with reviewers repeatedly highlighting sub-$100 pricing, strong features, and performance beyond the price.

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

Voice prompts and feedback were criticized as unclear or awkward, especially when mode sounds did not clearly communicate status.

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

Volume output was context-dependent: one reviewer had serious plane-volume issues, while another found plenty of level without distortion.

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

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 treated as missing value that could have improved the Pro model.

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.

The light weight helped comfort and travel use, with reviewers calling the headset comfortable and carry-on friendly.

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

Wind handling was usable but imperfect, with reviewers hearing some wind while still finding speech generally intelligible.

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