Compare Marshall Kilburn III Portable Bluetooth Speaker vs JBL Bar 500 MK2 Soundbar

Reviewers repeatedly praise calibration as quick and useful, with automatic room tuning or one-button calibration called out as an easy way to improve the sound.

AirPlay support is consistently present, with reviewers grouping it among the major streaming and casting options.

Power references point to a strong 50W Class D amplifier setup, repeatedly tied to the speaker's loud, forceful output.

One reviewer highlights 750 W total system power, supporting the impression that the bar-sub package has substantial output for home theater use.

App impressions are mixed: one reviewer could not finalize the app connection, while others found the app clean, useful, and easy for EQ and settings.

App feedback is mixed: one review says the JBL One app connected and updated easily, while others mention limited in-app streaming and EQ settings that do not save.

Audio format support is adequate but limited, with reviewers noting SBC, AAC, and LC3 while calling out the lack of higher-resolution codecs.

Format support is good but not unanimous: reviewers cite Dolby Atmos and DTS Virtual X on the MK2, while one transcript says there is no DTS support.

Battery life is one of the clearest strengths, with reviewers repeatedly citing about 50 hours or real-world multi-day use.

Bluetooth codec support covers standard lossy codecs, but reviewers consistently noted the absence of hi-res options such as LDAC or aptX Adaptive.

Bluetooth connection stability tested well in direct use, with one reviewer reporting easy pairing, a solid connection, and no signal weirdness.

Bluetooth streaming is mentioned positively in owner use, but there is limited direct evidence about long-range or stress-test stability.

Bluetooth range is viewed positively, with reviewers citing a 10-meter range and one test exceeding that distance around the house.

Build and cabinet quality are praised as solid, premium, and durable-feeling, with sturdy materials and a serviceable battery access door.

Charging is generally strong with USB-C PD and quick-charge claims, though reviewers warn that weaker chargers or playback while charging can slow things down.

Chromecast and Google Cast support are repeatedly listed as built-in streaming options across reviews.

The speaker presents a cohesive Marshall package, combining warm sound, loud output, physical controls, and retro styling into a unified experience.

System cohesion is mixed: the bar-sub package can elevate the experience, but one reviewer hears a gap between the subwoofer and soundbar.

Physical control feel is a major strength, with reviewers praising tactile switches, knobs, and playback controls.

Design is one of the most widely praised traits, with reviewers repeatedly calling out the amp-inspired retro look, premium finishes, and statement-piece character.

Design impressions are broadly positive, emphasizing a low-profile, discreet bar with minimal branding and, in one review, a new white finish.

Build quality is acceptable rather than premium: reviewers mention the compact low bar and plastic/aluminum-style construction that still feels solid.

Detail retrieval is generally strong, especially in vocals, cymbals, bass texture, and layered tracks, though one reviewer heard some upper-mid detail loss.

Detail retrieval gets positive remarks, especially for movie effects and small audio nuances that stand out clearly.

Dialogue clarity is one of the strongest themes, with several reviewers saying voices are clear, easy to understand, or helped by PureVoice.

High-volume distortion control is excellent across reviews, with repeated reports of loud playback without cracking, hissing, peaking, muddiness, or obvious distortion.

Dolby Atmos performance is generally effective for a bar, though reviewers note the height effect is virtual and less dramatic without up-firing drivers.

Dust resistance improved over the prior model, with reviewers consistently citing IP54 protection as useful but not fully rugged.

Dynamic behavior is a strength, with reviewers crediting dynamic loudness and placement compensation for preserving balance and detail as volume changes.

Dynamic ability is strong for room-filling impact, but bass speed can lag on fast rhythms according to one review.

Energy efficiency is supported by the unusually long runtime from only a modest battery-capacity increase, which one reviewer attributes to major efficiency gains.

EQ customization is broad for a Bluetooth speaker, with physical bass and treble knobs plus app presets, custom EQ, placement compensation, and M-button shortcuts.

EQ customization is available through the app or controls, but one reviewer criticizes the lack of saved presets and unsaved EQ behavior.

Everyday usability is strong thanks to straightforward controls, easy living-room use, and the ability to move the speaker around without losing useful sound coverage.

Frequency balance is broadly praised for tight bass, clear mids, and crisp highs, though a few reviewers heard extra bass or mids in some contexts.

The tonal balance is warm and bass-rich; reviewers like the fullness, though some note slower or less seamless bass integration.

Gaming passthrough is useful for basic console hookup but limited, with reviewers warning that 4K passthrough is capped and not HDMI 2.1.

Google support is limited to Fast Pair, which reviewers describe as a useful setup convenience rather than a full smart ecosystem feature.

Google compatibility is present through Google Cast/Home mentions, with one review noting external voice-control dependence.

The carry strap is praised for comfort, style, and usefulness, especially its velvet lining and secure feel despite the speaker's weight.

HDMI 2.1 gaming support is a weakness because reviews state the HDMI input is not HDMI 2.1 or is limited to 4K/60.

HDMI ARC/eARC is consistently useful, with reviewers saying it is included and simple for TV hookup.

Home theater integration is limited today, but one reviewer notes future Auracast surround use with Marshall soundbars as a possible path.

Home theater integration is a strength, helped by HDMI connectivity, TV remote control behavior, passthrough, and console/disc-player flexibility.

Inter-speaker connectivity is a weakness: reviewers repeatedly note no native stereo pairing or multi-speaker system, and one Auracast attempt was glitchy.

The wireless subwoofer connection is treated as a practical benefit because placement is flexible without running speaker cable.

LED lighting is present as functional knob illumination and level indication, not as decorative party lighting.

Lighting is limited to useful LED indicators on the controls rather than immersive or decorative effects.

Maximum volume is a major strength, with reviewers describing serious, room-filling, or even unbelievable loudness for a single portable speaker.

Maximum loudness is a strength, with reviewers citing 750 W output, room-filling sound, and more volume than they needed.

Low-volume performance is specifically praised for retaining richness, separation, and bass rather than thinning out in background listening.

Low-volume listening benefits from PureVoice, especially for nighttime or apartment use where dialogue still needs to stand out.

The microphone category is a clear weakness because multiple reviewers state there is no built-in mic.

Microphones are discussed mainly for calibration, not calls or voice capture, but reviews confirm built-in/top microphones for room analysis.

Multi-speaker pairing reliability is weak because reviewers say the speaker lacks true wireless stereo or native multi-speaker pairing, with one failed Auracast attempt.

Multi-speaker pairing is supported through JBL grouping or Oriccast-style linking, though reliability is not deeply stress-tested.

Multipoint connectivity is supported and described as letting two devices pair at the same time.

Omnidirectional sound is a standout feature, with reviewers repeatedly praising the 360-degree, wide, room-filling presentation and minimal dead spots.

On-device controls are a major strength, with reviewers repeatedly praising the knobs, switches, playback control, and simple no-learning-curve operation.

On-device controls are basic and accessible, with volume/source controls mentioned, though one reviewer dislikes the input button behavior.

Optical input is consistently listed as a supported wired option alongside HDMI connections.

The power-bank function is repeatedly confirmed, letting the speaker charge phones or other devices through USB-C.

Price and value are mixed-to-positive: reviewers call it pricey, but most say the sound, design, battery, and upgrades justify the cost.

Remote usability is positive overall, described as simple or useful, with phone remote control also available through the app.

Setup is simple, helped by Bluetooth pairing and Google Fast Pair, with one reviewer calling the pairing process real simple.

Setup is repeatedly described as simple, from easier app connection to basic power/HDMI hookup and one-button calibration.

Smart assistant integration is effectively absent, with reviewers repeatedly noting no voice assistant or voice control.

Smart assistant integration exists through Alexa/Google compatibility, but one reviewer notes assistants are not built into the soundbar itself.

Smart features are intentionally minimal, with no Wi-Fi, voice assistant, or smart-speaker behavior despite a useful app and EQ tools.

Smart features are broad, including streaming services, app control, casting, room calibration, and multi-room playback options.

Height presentation is the main Atmos compromise: it creates some height, but several reviews stress there are no dedicated up-firing drivers.

Speakerphone capability is absent because reviewers state there is no built-in microphone and that it cannot be used as a speakerphone.

Spotify Connect is strongly supported where tested, including a review that says it works seamlessly.

Status indicators are useful, with reviewers highlighting the 10-bar battery gauge and illuminated control-level LEDs.

Status feedback is a strong usability point, with reviewers appreciating clear built-in displays or plain-English indicators.

Stereo imaging is wide and impressive, but not truly precise stereo separation; reviewers praise spaciousness while noting symmetry and separation limits.

Stereo imaging is praised in one review for centered vocal effects and a stable image.

Low-end hardware gets positive attention, with reviewers citing the built-in subwoofer or woofer as a source of strong bass.

The subwoofer is one of the product's clearest strengths, repeatedly described as powerful, deep, physical, and central to the experience.

Surround-like presentation is wide and immersive, but reviewers caution that it is not true full surround sound.

Surround simulation is widely praised for spreading sound around the room, though it remains simulated rather than rear-speaker surround.

Sustainability is supported by the replaceable battery design and battery-preservation features that may extend useful life.

USB-C charging is a clear upgrade and strength, supporting charging the speaker and external devices with modern USB-C hardware.

Overall value for money is mostly positive, with reviewers seeing worthwhile upgrades, strong sound, premium design, and long battery life despite the price.

Value is a major positive theme, especially in reviews calling it affordable, best-in-test, or a strong buy around $500 or less.

Video passthrough is useful, with HDR10+/Dolby Vision or 4K Dolby Vision mentioned, but gaming bandwidth limits remain a caveat.

Voice clarity is strong for music playback, with reviewers repeatedly reporting clear, forward, or crisp vocals.

Voice clarity is generally strong, with reviewers saying voices are emphasized clearly and stand out without strain.

Water resistance is useful but moderate: reviewers consistently cite IP54 splash protection while warning it is not full waterproofing or beach-rugged IP67.

Weight convenience is mixed: reviewers find it carryable with the strap, but repeatedly describe it as heavy, large, or better for home and gatherings than backpacking.

Weight and size convenience are mixed: the bar is compact, while the subwoofer is heavy enough to place once and leave alone.

Wi-Fi streaming is a weakness because reviewers repeatedly note there is no Wi-Fi support, even at this price.

Wireless streaming is generally positive through Wi-Fi and casting, although one reviewer notes the lack of Ethernet could matter in weak Wi-Fi rooms.

Wired input is a useful fallback, with reviewers highlighting the 3.5mm AUX port for non-Bluetooth or higher-quality listening paths.

Wired inputs are flexible, with reviewers citing HDMI/eARC, optical, USB, and even Ethernet or flash-drive playback depending on the transcript.