Compare Marshall Kilburn III Portable Bluetooth Speaker vs Bang & Olufsen Beosound A1 Speaker 3rd Gen

Review evidence says the A1 does not support AirPlay, so Apple users still rely on Bluetooth or wired USB-C rather than Wi-Fi/AirPlay streaming.

Multiple reviews cite the dual 30W Class D amplification or 60W total output, supporting unusually strong output for the compact chassis.

The Marshall app is generally viewed as useful for EQ, placement compensation, and battery features, but there are reports of occasional pairing/setup friction and some early-stage quirks around broadcast features.

The B&O app is repeatedly described as helpful, responsive, and one of the best of its kind, though one reviewer could not get built-in radio working.

Audio format support centers on SBC, AAC, aptX Adaptive, and USB-C wired audio rather than Wi-Fi-based formats.

Backwards compatibility is a strength for stereo pairing because the third-generation speaker can pair with a second-generation A1.

Battery life is consistently described as class-leading around 50 hours, with several reviewers noting it lasts days to over a week in normal use and dramatically outclasses many rivals in this size.

Battery life is consistently positive, with most third-generation reviews citing 24 hours and several testers finding that figure believable or conservative.

Codec support is repeatedly called basic, commonly described as SBC/AAC (and LC3 in some coverage), with reviewers noting the absence of higher-end options like LDAC or aptX Adaptive.

Bluetooth codec support is strong for the class thanks to AAC and aptX Adaptive alongside basic SBC support.

Bluetooth stability is largely reported as solid and reliable, with few dropouts mentioned during typical use, though broadcast-style features are not always seamless depending on devices.

Connection stability is generally praised, with reviewers reporting no dropouts or solid pairing, though one garden-range test eventually cut out at distance.

Reported range aligns with typical expectations for the class, with at least one review noting it can exceed the stated 10m in real home use.

Range evidence is moderate, with one review citing about 10 meters outdoors and another suggesting real-world limits near the end of a garden.

Construction is one of the most consistent strengths, with reviewers praising premium aluminum, polymer, finish quality, and overall craftsmanship.

Charging is often cited as around three hours with an appropriate USB-C PD charger and includes quick-charge style benefits, but several notes warn slower chargers can dramatically extend charge time.

Charging time is functional but not fast; several reviews cite roughly three hours and describe it as long or leisurely.

Overall presentation is consistently described as cohesive and engaging, with strong room-filling character and a tuning that works across many genres without falling apart at higher volumes.

The A1 is repeatedly described as cohesive, unified, controlled, and spacious rather than scattered or disjointed.

Button and control responsiveness is consistently described as satisfying and tactile, with several reviews calling out the premium feel of toggles, knobs, and playback controls.

Physical buttons are generally praised as responsive, tactile, clicky, and easier to use.

Nearly every review highlights the signature Marshall amp-inspired look, premium materials, and tactile hardware controls as a major reason to buy, often calling it a statement piece for the home.

Design and aesthetics are a standout consensus strength, with reviewers repeatedly emphasizing the premium, stylish, minimalist look.

Detail is widely considered strong for a portable speaker, with good separation and clarity across genres, though some commentary suggests top-end nuance and precision can trail the very best competitors in ideal listening positions.

Detail retrieval is strong across reviews, especially through the midrange, vocals, and small instrumental textures.

Reviews frequently praise how well it controls distortion at higher volumes, with dynamic loudness and tuning keeping the sound from getting harsh or breaking up when pushed.

Distortion control is mostly strong at higher volumes, though one review notes distortion or strain on demanding bass-heavy tracks.

Build is often described as tank-like and sturdy, with reviewers suggesting it should handle everyday knocks and occasional falls better than many plastic-bodied competitors.

Durability is mixed: IP protection and prior-generation bump resistance help, but several reviewers warn the aluminum can scuff or may not survive rough drops like rugged JBL rivals.

Dust resistance is tied to the IP54 rating and is framed as adequate for everyday outdoor use (patios, parks), but not a fully rugged, sand-and-submersion type rating.

Dust resistance is strongly supported by repeated IP67 references and explicit dustproof or dust-resistant descriptions.

Dynamic headroom is repeatedly credited for keeping the sound energetic and controlled as volume changes, helping preserve detail and balance at both moderate and loud listening levels.

Dynamic performance is capable for the size but not class-leading; some reviews praise dynamism while others say rivals offer larger dynamic swings.

One detailed review highlights major efficiency gains enabling very long playtime from only modest battery capacity growth, suggesting strong power management for the class.

EQ flexibility is frequently praised: users can tweak bass/treble with physical knobs and use app-based presets plus a multi-band EQ, with shortcuts like an M button for quick switching.

EQ customization is a clear app strength, with preset modes and a visual sound control repeatedly described as useful and approachable.

Everyday usability is strong because reviewers find the speaker simple to operate, portable, and easy to live with in travel, desk, shower, and small-room use.

Most coverage describes a lively, warm-leaning balance with strong bass and clear mids, though a few notes mention it can sound a bit bass-forward or have occasional mid/treble character that some listeners may want to EQ.

Frequency balance is generally warm, rich, and controlled rather than strictly neutral, with impressive bass for size and some caveats around bass depth or treble impact.

Google-related support appears through Google Fast Pair, making Android pairing easier alongside Microsoft Swift Pair and Apple-focused support.

The carry strap/handle is frequently praised for comfort and security, making the speaker easier to move around than some similarly heavy rivals.

The strap is usually praised as elegant or useful for carrying, though one review notes there is no carrying case and another notes leather may not suit every buyer.

Inter-speaker connectivity is strong because multiple reviews confirm stereo pairing, including pairing across second- and third-generation A1 units.

The Kilburn III is repeatedly described as very loud for its class and capable of powering outdoor hangs or parties, with enough headroom to feel big in larger rooms.

Maximum volume is good for the size and small spaces but not ideal for big outdoor parties or competing with larger JBL-style speakers.

Low-volume listening is reported to stay rich and satisfying, helped by dynamic loudness behavior that avoids losing bass and body when playing quietly.

Microphone support is well covered, with reviews describing built-in mics, mute controls, FarField technology, and speakerphone use.

A frequent downside is the lack of native stereo pairing or a built-in multi-speaker ecosystem; Auracast is discussed as a workaround, but it depends on compatible sources and is not universally smooth yet.

Multi-speaker pairing is a strength in the included reviews, especially because the app supports stereo setup and cross-generation pairing works.

Multipoint capability is referenced as available in some coverage, supporting quick switching or pairing to two devices, though it is not the primary focus of most reviews.

Multipoint connectivity is consistently supported, with multiple reviews describing two-device pairing and one YouTube reviewer calling it flawless.

Multiple reviewers confirm the 360-style presentation works well, maintaining a full sound as you move around the speaker, though a few describe it as not perfectly wraparound like some cylindrical rivals.

Omnidirectional sound is mixed: some reviews call it 360-degree or all-directional, while others say it is not truly 360-degree and depends on positioning.

On-device controls are repeatedly praised as a major strength: tactile knobs, dedicated playback control, and shortcut buttons reduce reliance on the app and are easy for anyone to use.

On-device controls are well implemented, with power, pairing, volume, playback, and mic controls placed around the speaker body.

Power bank use is a highlighted perk, letting you charge a phone from the speaker, with at least one review noting you should pay attention to charge direction behavior depending on speaker power state.

Price/value is the most repeated caveat: reviewers like the product but frequently call it expensive or weaker value than JBL alternatives.

Privacy evidence is limited but positive in one review because the removal of built-in Alexa means the speaker is not always listening for Amazon voice commands.

Setup is typically described as straightforward with fast pairing behavior, and most reviewers report stable day-to-day use once connected.

Setup is generally simple, helped by Fast Pair, Swift Pair, quick Bluetooth discovery, and straightforward operation.

Smart assistant integration is weak for the third generation because several reviews say Alexa has been dropped or is not built in.

Smart features are intentionally limited: reviews repeatedly note no Wi-Fi streaming and no voice assistant, with the app focused on sound shaping, placement compensation, and battery management.

Smart features are mixed: the app adds streaming, radio, EQ, and settings, but reviewers note no Auracast, no Wi-Fi, and no Alexa on the third-generation model.

Several reviews explicitly note the lack of a built-in microphone, meaning it is not a good choice if you want speakerphone or hands-free calling features.

Speakerphone quality is a useful strength, with several reviews saying calls are clear or successful and one caller rating it highly.

Status feedback is frequently described as strong, including battery indication and LED/indicator behavior around physical knobs that makes quick adjustments easy without looking at a phone.

Status indicators are functional but mixed, with LEDs present for status and charging while one review wished the indicator were larger.

Reviews commonly note it is stereo only in a technical sense; the footprint feels wide, but true left-right separation and pinpoint imaging are limited compared to dedicated stereo pairs.

Stereo imaging and separation are generally good for a compact Bluetooth speaker, with reviewers praising organized soundstage and instrument separation, though scale is limited.

No summary yet.

Replaceable battery access and longevity features are repeatedly framed as a sustainability win, helping extend the usable life of the speaker compared to sealed-battery designs.

Sustainability is a standout feature because reviews repeatedly cite Cradle to Cradle certification, modularity, repairability, and replaceable battery support.

USB-C charging is broadly praised as convenient and modern, with some reviews noting the lack of an included high-wattage adapter as a small annoyance.

USB-C charging is well supported and also doubles as a wired audio/data path in several reviews.

Value is generally considered good for buyers prioritizing design, battery, and big sound, but some reviewers still flag the price as premium given the lack of Wi-Fi, voice features, and stereo pairing.

Value for money is mixed: some reviewers say the premium is justified by build and sound, while others say cheaper JBL or other rivals are better buys.

Voice assistant responsiveness is only supported in the older included A1 review, where Alexa setup is described as working equally well once configured.

Voice clarity is a recurring strength, with reviewers praising vocal intelligibility, natural vocals, and clear speech reproduction.

IP54 protection is generally seen as a welcome upgrade that handles splashes and light rain, but many reviewers still call it less rugged than IP67-style competitors for serious outdoor abuse.

Water resistance is strongly supported by repeated IP67 descriptions and sink, beach, pool, shower, and shallow-submersion references.

Multiple reviews call it heavy for true travel or backpack use, though the strap helps and most position it as portable around home, yard, or short trips rather than hiking gear.

Weight convenience is good but not perfect; reviewers find it easy to bag or carry, while noting it is not the lightest option at its size.

Wi-Fi streaming reliability scores low because reviews repeatedly say there is no Wi-Fi on board, so Wi-Fi streaming is not available to evaluate.

Reviews commonly note the presence of a 3.5mm AUX input as a useful fallback for wired listening and for sources that can benefit from a cable connection. Wired AUX use is generally described as a good alternative path for quality listening, with at least one review noting the signal still goes through internal processing rather than staying purely analog end-to-end.

Wired input is a strength on the third-generation model because USB-C can handle wired audio as well as charging.