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Marshall Emberton III vs Ultimate Ears BOOM 3

A

Product A: Marshall

Emberton III

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B

Product B: Ultimate Ears

BOOM 3

54 of 96 known

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Every value links to where we found it.

Only differences

AMarshall Emberton III

BUltimate Ears BOOM 3

General

5 of 8 differ

Series

Emberton1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

BOOM1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

10068841Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Exact currently sold US Black and Brass selection, pid and public Product JSON-LD SKU 1006884. Selected colour and InStock offer were read. Brown strap bundle, limited editions and other colour SKUs are excluded.12Retailer pagebhphotovideo.com/c/product/1840903-REG/marshall_1006884_emberton_iii_black_brass.htmlRead 8 October 2026

984-001348, 984-001350, 984-001351, 984-0013522Maker product pagelogitech.com/en-us/products/speakers/bluetooth-speakers/boom-3.htmlRead 23 October 2026This page lists part number 984-001350. The other colour part numbers come from the retailer pages in the sources.18Retailer pagegreentoe.com/product/Ultimate_Ears_BOOM_3_Portable_Wireless_Bluetooth_Speaker__Night_Black__984-001348Read 23 October 2026Night Black is part number 984-001348. Lagoon Blue is 984-001350 on the maker page.19Spec databasegearbrain.com/devices/3C308330C41B11EB91B0D0B61C6BC496.htmlRead 23 October 2026Ultraviolet Purple is part number 984-001351.20Spec databasegearbrain.com/devices/081361C5C3FC11EB91B0D0B61C6BC496.htmlRead 23 October 2026Sunset Red is part number 984-001352.

GTIN / EAN

734005540225512Retailer pagebhphotovideo.com/c/product/1840903-REG/marshall_1006884_emberton_iii_black_brass.htmlRead 8 October 2026Exact Black and Brass MFR 1006884 page explicitly lists EAN 7340055402255. This is the selected normal SKU, not Cream or Hendrix. Public web-rendered page was read. Its incorrect one-driver and 2 x 76 W technical cells are excluded, and no access challenge was bypassed.

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

19 August 20243Press releaselittleredrooster.co.uk/wp-content/uploads/2024/08/UK_Emberton-III-Willen-II-press-release.pdfRead 8 October 20264Press releasegroup.marshall.com/2024/08/19/marshall-unveils-new-portable-powerhouses-emberton-iii-and-willen-iiRead 8 October 2026

30 August 20188Press releasenews.logitech.com/press-releases/news-details/2018/Introducing-Ultimate-Ears-BOOM-3-and-MEGABOOM-3-Packed-With-New-Features/default.aspxRead 23 October 2026

Status

Available1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

Available1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026US store sells it at 149.99 USD with an Add to cart button (read 2026-10-23). RTINGS says the BOOM 4 replaced it, but the maker still sells it.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Marshall Emberton II13Reviewwhathifi.com/news/rock-on-marshalls-third-gen-portable-speakers-are-here-to-rock-your-world-wherever-you-goRead 23 October 2026What Hi-Fi calls the Emberton III a sequel to the second-generation Emberton and says it is slightly larger than its predecessor.14Press articlet3.com/tech/bluetooth-speakers/marshall-emberton-3-reviewRead 23 October 2026T3's review calls the Emberton III the replacement for the Emberton II.

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Ultimate Ears BOOM 411Reviewrtings.com/speaker/reviews/ultimate-ears/boom-3Read 23 October 2026Public notice: this speaker was replaced by the Ultimate Ears BOOM 4.21Reviewtrustedreviews.com/reviews/ultimate-ears-boom-4Read 23 October 2026Trusted Reviews says a successor to the UE Boom 3 finally arrived in the Boom 4.

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$1693Press releaselittleredrooster.co.uk/wp-content/uploads/2024/08/UK_Emberton-III-Willen-II-press-release.pdfRead 8 October 2026Page 3 Manufacturer Suggested Retail Price lists US 169 USD and EU 179 EUR. Stored literal whole-currency amounts preserve this primary launch document. Later current 179.99 USD price and differing review quotations are excluded. US tax treatment is not specified.

$149.998Press releasenews.logitech.com/press-releases/news-details/2018/Introducing-Ultimate-Ears-BOOM-3-and-MEGABOOM-3-Packed-With-New-Features/default.aspxRead 23 October 2026Suggested retail price for BOOM 3 is 149.99 USD. US price, tax treatment not stated.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

€1793Press releaselittleredrooster.co.uk/wp-content/uploads/2024/08/UK_Emberton-III-Willen-II-press-release.pdfRead 8 October 2026Page 3 original EU MSRP is 179 EUR. Exact normal launch model, not a limited edition or current sale price. VAT treatment is not expressly stated.

€1509Press articlemobiflip.de/ue-boom-megaboom-3Read 23 October 2026German IFA 2018 launch report: UE Boom 3 costs 150 Euro. Igor'sLAB also gives a German EIA of 150 euros. Stored as the reported 150. No maker euro document was found. Tax treatment not stated.10Reviewigorslab.de/en/ultimate-ears-boom-3-in-test-bluetooth-party-cracker-or-windyRead 23 October 2026Review states an EIA (German list price) of 150 euros.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

US1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026US store page, reference market.

ColoursiThe maker's own colour names

Black and Brass1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

Night Black, Sunset Red, Lagoon Blue, Ultraviolet Purple8Press releasenews.logitech.com/press-releases/news-details/2018/Introducing-Ultimate-Ears-BOOM-3-and-MEGABOOM-3-Packed-With-New-Features/default.aspxRead 23 October 2026Four launch colours: Night (Black), Sunset (Red), Lagoon (Blue), Ultraviolet (Purple). Written as the retailer and archived maker pages write them.

Speaker typeiHome covers speakers made to stay in one place, including smart speakers. A speaker with Wi-Fi or a voice assistant can be of any type.

Portable1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

Portable1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Maker calls it a super-portable wireless Bluetooth speaker with a carry loop and battery.

Audio

9 of 18 differ

Audio channelsiSound channels reproduced by one speaker. Pairing two speakers for stereo is separate.

Stereo1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Maker Stereo/mono table explicitly states Stereo for one physical speaker. True Stereophonic is the built-in multidirectional stereo playback feature, not proof of wireless left/right pairing.

Stereo3Maker product pageweb.archive.org/web/20230314222408/https://www.ultimateears.com/en-us/wireless-speakers/boom-3.htmlRead 23 October 2026Maker text: stereophonic audio that radiates evenly in all directions. One physical speaker.14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Review calls it a stereo speaker with drivers firing in opposite directions.

Audio driversiPowered audio transducers in one speaker. Passive radiators are counted separately. Circular diameter and rectangular width and height have separate columns. Per-driver power must state continuous or RMS basis and battery or mains operation in the source note.

AMarshall Emberton III

Driver type	Count	Diameter (mm)
Dynamic full-range	2	50.8

Source5Retailer pagecrutchfield.com/p_972EMBT3BK/Marshall-Emberton-III-Black-and-Brass.htmlRead 8 October 2026Exact MFR 1006884 product highlights and narrative explicitly identify two 2-inch full-range powered drivers, each with its own Class D amplifier. Published nominal diameter 2 inches converts exactly to 50.8 mm. No continuous per-driver watts are established. Maker/PR amplifier figure two 38 W and 10 W driver labels have no continuous/RMS operating basis, so all rated/peak audio power fields remain unknown. B&H miscounts one powered driver and says 2 x 76 W, which are excluded.6Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-emberton-iii-bluetooth-speaker-reviewRead 8 October 2026Specs table explicitly lists two full-range drivers and two passive radiators. Its watt labels lack a continuous/RMS basis and are not stored as rated audio output.

BUltimate Ears BOOM 3

Driver type	Count	Diameter (mm)
Active driver	2	38

Source1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026AUDIO row: two 2 inch drivers and two 2 x 4 inch passive radiators. The 2 inch figure is a nominal class. The lab test measured 38 mm, which is stored. See the Fnac lab source.12Measurementleclaireur.fnac.com/test/27027-test-labo-de-lultimate-ears-boom-3-des-ameliorations-bienvenues-mais-surtout-ergonomiquesRead 23 October 2026Labo Fnac measured the two active drivers at 38 mm diameter and the passive radiators at 40 x 80 mm. The maker rounds to 2 inch.13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Two active drivers firing left and right and two passive radiators below them.14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Two 2 inch active drivers, each paired with a passive radiator.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

21Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Two passive radiators. These are unpowered and excluded from the powered-driver table.

21Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 202614Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Two passive radiators, one per side.

Rated audio poweriMaker-published total rated continuous audio output. Battery power is used for portable speakers when mains and battery ratings differ. Peak marketing power is separate.

Not available

Not available

Rated audio power on mainsiTotal rated continuous audio output with external power. Store a separate battery rating when the maker publishes both.

Not available

Not available

Audio output power (unspecified rating)iMaker- or reviewer-published audio output power whose continuous or peak rating basis is not stated. This is separate from rated continuous output and explicitly published peak output.

Not available

Not available

Peak audio poweriExplicitly published peak audio output. Never substitute for rated continuous output.

Not available

Not available

Frequency response lower limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

65Hz1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Published 65 Hz to 20,000 Hz range. Tolerance and volume mode are not stated. The separate 90 dB SPL at 1 m maker claim is not a reviewer measurement and is not entered in measured_max_spl_db.

90Hz1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Published 90 Hz to 20 kHz. No tolerance stated.

Frequency response upper limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

20kHz1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

20kHz1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Published 90 Hz to 20 kHz. No tolerance stated.

Signal-to-noise ratio (claimed)

Not available

Not available

Adjustable equalizeriUser-adjustable frequency bands. Selecting fixed sound presets alone does not qualify.

No6Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-emberton-iii-bluetooth-speaker-reviewRead 8 October 2026Matching third-generation review states three fixed EQ presets and no EQ customization. Selecting fixed presets does not meet adjustable-band equalizer field meaning.7Reviewlesnumeriques.com/enceintes-portables/marshall-emberton-iii-p75413/test.htmlRead 8 October 20269Reviewtomsguide.com/audio/marshal-emberton-iii-reviewRead 8 October 2026Review states three fixed presets are the only sound personalization. Its approximately 31-hour mid-volume observation has looser conditions than the selected 80 dB / 1 m test and is not mixed into the stored runtime.

Yes1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Key features: 4 presets and a customized tuner.6Maker product pagesupport.logi.com/hc/en-us/articles/16007695217943-How-can-I-customize-the-EQRead 23 October 2026Support article: drag the nodes of any EQ mode in the UE | BOOM app. One custom EQ can be saved for BOOM 3.

Equalizer bandsiNumber of user-adjustable frequency bands. Do not count sound presets.

Not available

57Maker product pageultimateears.com/en-us/discover/c/appsRead 23 October 2026Maker app page describes a fully customizable 5-band equalizer in the BOOM app. Trusted Reviews also counts five bands for BOOM 3.14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026App has four presets and a custom setting with five EQ bands.

Automatic sound adjustmentiAdjusts audio to placement or playback conditions. Keep the named feature and conditions in the source note.

Yes1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Dynamic Loudness automatically adjusts tonal balance as the listening volume changes. This is not spatial room calibration.

Not available

Sound modesiNamed playback modes. Battery extension modes are also qualified in battery source notes.

Marshall, Push, Voice7Reviewlesnumeriques.com/enceintes-portables/marshall-emberton-iii-p75413/test.htmlRead 8 October 2026Application section explicitly names Marshall, Push and Voice fixed modes. Tested firmware 9.1.7 and Marshall Bluetooth app 3.2.1.1 (250123.176). No user-adjustable band equalizer.

The Standard, Cramped Spaces, Voices, Bass Jump15Reviewtechradar.com/reviews/ultimate-ears-boom-3Read 23 October 2026App presets: The Standard, Cramped Spaces, Voices and Bass Jump, plus a custom tuner. Maker says four presets.

Wireless stereo pairingiTwo compatible speakers can play separate left and right channels.

Not available

Yes15Reviewtechradar.com/reviews/ultimate-ears-boom-3Read 23 October 2026The app can link two UE Boom 3 speakers for stereo sound. What Hi-Fi and Expert Reviews say the same.16Reviewwhathifi.com/reviews/ultimate-ears-boom-3Read 23 October 2026The Boom app lets you link two Boom 3s for stereo sound. Its tech specs box lists the larger MEGABOOM 3 size and weight, so those values are not used.17Reviewexpertreviews.co.uk/ue/1407679/ultimate-ears-boom-3-review-boom-2-successorRead 23 October 2026Two Boom 3 speakers can run as a stereo pair.

Speaker link protocolsiNamed systems for linking compatible speakers, such as PartyBoost, Auracast or Party Connect. Linking support does not establish compatibility across all models.

Not available

PartyUp3Maker product pageweb.archive.org/web/20230314222408/https://www.ultimateears.com/en-us/wireless-speakers/boom-3.htmlRead 23 October 2026PartyUp in the BOOM app. Works with BOOM, MEGABOOM and HYPERBOOM speakers.

Max linked speakersiPublished maximum in a speaker group. A stereo pair is recorded separately. A figure such as 100+ is stored as 100.

Not available

1503Maker product pageweb.archive.org/web/20230314222408/https://www.ultimateears.com/en-us/wireless-speakers/boom-3.htmlRead 23 October 2026Archived page says over 150 speakers. The press release and the support article say up to 150, which is stored.5Maker product pagesupport.logi.com/hc/en-us/articles/19154583137175-How-To-Use-The-Ultimate-Ears-Boom-AppRead 23 October 2026PartyUp pairs up to 150 speakers. Any BOOM or MEGABOOM can join.

Max Bluetooth group speakersiPublished maximum speakers in one Bluetooth playback group, including the first speaker. Source notes name the compatible models or families, linking system and firmware requirements. Wi-Fi groups and concurrent Bluetooth source devices are excluded. A stereo pair alone does not establish the maximum when other Bluetooth linking systems are supported. A figure such as 100+ is stored as 100.

Not available

Not available

Connectivity

4 of 16 differ

Bluetooth audio playbackiPlays audio streamed over Bluetooth from a phone or other source. Bluetooth used only for setup or app control does not count.

Yes5Retailer pagecrutchfield.com/p_972EMBT3BK/Marshall-Emberton-III-Black-and-Brass.htmlRead 8 October 20267Reviewlesnumeriques.com/enceintes-portables/marshall-emberton-iii-p75413/test.htmlRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Maker page and Compatibility row: plays audio from Bluetooth devices using A2DP.

Bluetooth versioniVersion of the Bluetooth radio. Some Wi-Fi speakers use Bluetooth only for setup. See Bluetooth audio playback.

5.31Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Maker explicitly publishes Bluetooth 5.3 LE. LE Audio-ready and future Auracast wording do not prove current activation. Current exact-model 9.2.6 firmware notes were checked and only identify security/Fast Pair changes, so LE Audio/Auracast activation and speaker-link limits remain unknown.

Not available

Bluetooth codecsiExplicitly supported receive codecs. Bluetooth version alone does not establish codecs.

SBC5Retailer pagecrutchfield.com/p_972EMBT3BK/Marshall-Emberton-III-Black-and-Brass.htmlRead 8 October 2026Current exact-model Specs panel opened in normal Chrome: SBC Yes, AAC No. SBC is independently supported by Les Numeriques and Android Central. Only confirmed SBC is stored. Codec inventory is incomplete: AAC is disputed by those two reviews, so AAC is neither stored as supported nor labelled unsupported. aptX/LDAC are not inferred from Bluetooth version.7Reviewlesnumeriques.com/enceintes-portables/marshall-emberton-iii-p75413/test.htmlRead 8 October 2026Public characteristics table lists SBC and AAC. SBC agrees with current exact Crutchfield table. AAC conflicts with that retailer No cell and is omitted pending direct maker evidence. LC3 is described as unavailable under this tested firmware and is not treated as current universally active support.

SBC17Reviewexpertreviews.co.uk/ue/1407679/ultimate-ears-boom-3-review-boom-2-successorRead 23 October 2026Review: connects through Bluetooth using the SBC codec, with no aptX. Only SBC is stored.

Bluetooth profiles

Not available

A2DP1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Compatibility row names the A2DP audio profile. Bluetooth version is not published.

Bluetooth LE AudioiExplicit LE Audio support. Bluetooth LE for app control alone does not qualify.

Not available

Not available

AuracastiExplicit Auracast support. Sending, receiving and speaker-group roles belong in source notes.

Not available

Not available

MultipointiConcurrent Bluetooth source connections. Pairing memory and speaker-to-speaker linking do not qualify.

Yes2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026

Yes3Maker product pageweb.archive.org/web/20230314222408/https://www.ultimateears.com/en-us/wireless-speakers/boom-3.htmlRead 23 October 2026Wireless capabilities: pair up to 8 Bluetooth source devices and connect up to two source devices at the same time.

Multipoint source devicesiMaximum concurrently connected Bluetooth source devices, not remembered pairings.

22Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 7 explicitly states connected with 2 devices at a time and remembers up to 8 previously paired devices. Stored 2 counts concurrent Bluetooth source devices, not pairing memory or linked speakers.

23Maker product pageweb.archive.org/web/20230314222408/https://www.ultimateears.com/en-us/wireless-speakers/boom-3.htmlRead 23 October 2026Connect up to two source devices at the same time. The current US page no longer repeats this line.

Bluetooth range (claimed)iMaker-claimed Bluetooth range to the source device. Test conditions belong in the source note.

100m1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Up to 100 m in free field. Published open-field claim, not a typical indoor operating distance or a measured range.

45m1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Mobile range of play up to 45 m.

Wi-FiiBuilt-in Wi-Fi, for audio streaming, setup or control.

No6Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-emberton-iii-bluetooth-speaker-reviewRead 8 October 2026Review describes Bluetooth as the only playback connection. No Wi-Fi or wired playback is offered.

No11Reviewrtings.com/speaker/reviews/ultimate-ears/boom-3Read 23 October 2026Public header says Wi-Fi: No. Bluetooth only.14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Bluetooth only, no Wi-Fi.

Wi-Fi standardsiOne 802.11 name per item, such as 802.11ax. A Wi-Fi generation is written as its standard, so Wi-Fi 5 is 802.11ac and Wi-Fi 6 is 802.11ax. Older standards are listed only when a source names them.

Not available

Not available

Network audio protocolsiNamed systems that stream audio to the speaker over the home network. AirPlay is written as AirPlay 2. Chromecast built-in is written as Google Cast. Other names follow the maker, such as Spotify Connect.

Not available

Not available

USB audio inputiPlayback from a connected computer or phone through USB. Charging, service ports and USB flash-drive playback do not qualify.

No6Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-emberton-iii-bluetooth-speaker-reviewRead 8 October 2026Bluetooth-only music playback. USB-C is charging, not computer/phone USB audio input.

No13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Review: the only way to input sound is Bluetooth. The microUSB port is for charging.

USB drive playbackiPlayback of audio files on a connected USB storage device.

No6Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-emberton-iii-bluetooth-speaker-reviewRead 8 October 2026The review identifies no source route besides Bluetooth. USB-C charging is not USB storage-file playback.

No13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Review: no input other than Bluetooth. No USB drive playback.

USB audio file formats

Not available

Not available

PortsiPhysical speaker connectors. Record charging, audio input, power output and service roles separately. A shared microphone and guitar jack is one port. A combo jack that takes XLR and 6.35 mm plugs is 6.35 mm audio, and the role names XLR. Optical is a TOSLINK digital audio socket.

AMarshall Emberton III

Connector	Count	Role
USB-C	1	Charging power input

Source2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 4 complete device layout identifies one USB-C power input. Printed page 5 charging instructions use the supplied USB-C lead and recommend a 5 V / 3 A USB source. Port data version and maximum device input watts are not stated.

BUltimate Ears BOOM 3

Connector	Count	Role
Micro USB	1	Charging input under the rear weather door
Other	1	Charging contacts on the base for the POWER UP dock (sold separately)

Source12Measurementleclaireur.fnac.com/test/27027-test-labo-de-lultimate-ears-boom-3-des-ameliorations-bienvenues-mais-surtout-ergonomiquesRead 23 October 2026Lab confirms a microUSB port behind the rear cover, no mini-jack, and a port on the base for the Power Up dock.13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Review: microUSB charging port behind a flap and a metal connector on the base for the Power Up dock. No aux input.

Controls and software

3 of 8 differ

SpeakerphoneiBuilt-in microphone and call support, through a connected phone or a voice assistant's calling. A microphone used only for voice commands does not count. Microphone inputs for karaoke are separate.

Yes2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed pages 4-5 explicitly describe the microphone for speakerphone calls. Bluetooth button routes a call between speaker and phone. Knob answers/ends and rejects calls.

No11Reviewrtings.com/speaker/reviews/ultimate-ears/boom-3Read 23 October 2026Public header says Speakerphone: No. Locked numeric cells were not read.

Voice assistantsiVoice assistants explicitly usable through the speaker, such as Amazon Alexa, Google Assistant, Siri or Sonos Voice Control. State whether a connected phone is required.

Not available

Not available

Controls

Power button, Bluetooth pairing and call-routing button, Multidirectional playback, volume and call-control knob2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 4 power and Bluetooth buttons plus the multidirectional knob. Page 5: press once play/pause or answer/end, press twice reject call, left/right skip, up/down volume. Ten-segment battery indication is status, not another control.

Power button, Bluetooth pairing button, Volume up and down buttons, Magic Button for play, pause and skip, Battery level check (volume up and down together)4Owner's manualsupport.logi.com/hc/en-us/articles/18601577361559-Getting-Started-BOOM-3Read 23 October 2026Power button, Bluetooth pairing button, volume plus and minus, Magic Button (short press play or pause, double press skip), plus and minus together for battery level.

Companion app

Marshall Bluetooth1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

UE | BOOM4Owner's manualsupport.logi.com/hc/en-us/articles/18601577361559-Getting-Started-BOOM-3Read 23 October 2026The guide points to the Ultimate Ears BOOM and MEGABOOM app. The support EQ article calls it UE | BOOM.

App platforms

iOS, Android1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

iOS, Android5Maker product pagesupport.logi.com/hc/en-us/articles/19154583137175-How-To-Use-The-Ultimate-Ears-Boom-AppRead 23 October 2026Download the BOOM app from the Google Play store or the App Store. The article lists BOOM 3 as supported.

User firmware updates

Yes10Maker product pagemarshall.com/nl/en/support/speakers/support-for-emberton-iii/latest-firmware-versionRead 8 October 2026Exact-model current maker firmware page gives user app update instructions and versions 9.2.6/9.2.1/9.1.7. It does not publish an LE Audio/Auracast activation change, so no activation or broadcast count is inferred.

Yes5Maker product pagesupport.logi.com/hc/en-us/articles/19154583137175-How-To-Use-The-Ultimate-Ears-Boom-AppRead 23 October 2026Speaker Updates: a tap in the app updates the speaker.13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Review: the app can update the speaker software.

Built-in lightingiDecorative or ambient lighting. Status, battery, connection and microphone indicator LEDs alone do not qualify.

Not available

Not available

Lighting modes

Not available

Not available

Smart home

None of 3 known

Matter controlleriCan add and control Matter devices. Being a Matter device alone does not count.

Not available

Not available

Thread border routeriConnects Thread smart home devices to the home network.

Not available

Not available

Zigbee hubiA built-in Zigbee radio that controls Zigbee smart home devices.

Not available

Not available

Battery and charging

5 of 17 differ

Built-in battery

Yes1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026

Playback time (claimed)iMaximum maker-claimed music playback on one charge in normal playback mode. Battery extension or reduced-bass boost modes belong in battery_life_boost_h. Record volume and lighting conditions in the source note.

32h1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Normal-playback maker claim is 32+ hours on one charge. Stored 32 preserves the stated numerical threshold with the plus qualifier here, not an exact maximum or guaranteed runtime at every volume. No volume, codec, EQ preset or battery-preservation setting is specified. No battery extension total is published.

15h1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Up to 15 hours on a single charge. Varies with use, settings and environment. No volume stated.

Playback with battery extension (claimed)iTotal claimed runtime with the named battery extension mode enabled. Store the total, not only the extra hours. Keep sound and lighting restrictions in the source note.

Not available

Not available

Battery energyiPublished battery pack energy. Do not calculate from an assumed voltage.

Not available

Not available

Battery capacityiPublished pack capacity at the voltage in battery_voltage_v. Do not substitute power-bank output capacity. A figure written per cell, such as 5000mAh*2, is not a pack capacity unless the maker states the pack figure.

Not available

Not available

Nominal battery voltage

Not available

Not available

Battery chemistry

Lithium-ion2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 6 identifies lithium-ion batteries. Capacity, energy and nominal voltage are not stated and are not inferred.

Lithium-ion1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Embedded spec table: Rechargeable Lithium-Ion Battery. Capacity and voltage are not published.

User-replaceable batteryiBattery that the maker documents as replaceable by the user. Service replacement does not qualify.

Not available

Not available

Full charge timeiTime from discharged to full under the maker conditions. Adapter rating and simultaneous use belong in source notes.

2h1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Maker says full charge in 2 hours. Manual recommends a 5 V / 3 A USB power source. Charging while playing and battery-preservation settings are not specified. A recommended adapter rating is not substituted for a separately published speaker input ceiling.

Not available

Quick charge duration

20min1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Maker claim: 20 minutes of charging gives 6 hours of playtime. Volume, EQ preset, codec and initial state of charge are not stated.

Not available

Playback after quick chargeiClaimed music playback after quick_charge_min of charging. Source conditions apply.

6h1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

Not available

Charging input ratingiPublished speaker input voltage and current. An adapter rating alone does not establish device input.

Not available

Not available

Max charging inputiPublished maximum charging input. USB audio power requirements and adapter output are separate.

Not available

Not available

USB Power Delivery charging

Not available

Not available

Charges other devices

No5Retailer pagecrutchfield.com/p_972EMBT3BK/Marshall-Emberton-III-Black-and-Brass.htmlRead 8 October 2026Exact-model Power and Battery Info table explicitly says Charges External Device Via USB No. This excludes charging another device, separately from charging the speaker itself.8Reviewcomputerbild.de/artikel/avf-Tests-Audio-Marshall-Emberton-3-im-Test-Anders-und-doch-gleich-39229485.htmlRead 8 October 2026Public test conclusion explicitly identifies absence of a power-bank function and any music source besides Bluetooth. This corroborates the exact retailer table.

Not available

Max power-bank outputiPublished power delivered by the speaker to another device. Output voltage and current belong in the source note.

Not available

Not available

Wireless chargingiThe speaker battery can be charged wirelessly. Wireless power output to another device is separate.

Not available

Not available

Durability

3 of 5 differ

Dust and water ratingiExact published IP rating. Keep separate ratings, such as IP68 and IP69, as separate entries.

IP671Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026IP67 dust and waterproof claim: immersion at 1 m for up to 30 minutes. Does not establish floating or a defined drop-test height.

IP671Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026IP67, can be submerged for up to 30 minutes.

Floats

Not available

Yes1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026

Drop resistanceiExplicit maker claim or defined drop test. Do not infer from rugged wording.

Not available

Yes1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Page says the speaker passed more than 25 durability tests including multiple drop tests. Archived maker page footnote lists BOOM 3 as drop proof. No drop height is stated.

Drop test heightiMaker-published tested height. Surface and conditions belong in source notes.

Not available

Not available

Carry featuresiPublished handles, straps, carabiners or wheels.

Strap anchor2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 4 strap anchor is a fastening point for an optional carry strap or charm. No strap is included with this Black and Brass SKU.

Fabric loop13Reviewm.gsmarena.com/ultimate_ears_boom_3_review-news-35813.phpRead 23 October 2026Fabric loop on the back.14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Small fabric loop on the back for a carabiner. No carabiner included.

Measured

3 of 6 differ

Playback time (measured)iReviewer-measured playback per charge. Volume, lighting, sound mode, firmware and connection belong in the source note.

25.5h8Reviewcomputerbild.de/artikel/avf-Tests-Audio-Marshall-Emberton-3-im-Test-Anders-und-doch-gleich-39229485.htmlRead 8 October 2026December 8, 2024 original Emberton III battery test reports approximately 25.5 hours at average 80 dB sound pressure measured from 1 m. Stored literal 25.5 retains the review approximation, not an exact guaranteed result. Connection was Bluetooth, the available playback route. Source device, codec, EQ preset, firmware version, battery-preservation state, audio programme and status-light state are not published. Higher test level than the unqualified maker 32+ claim can shorten runtime, but no maker test volume is invented.

15.45h12Measurementleclaireur.fnac.com/test/27027-test-labo-de-lultimate-ears-boom-3-des-ameliorations-bienvenues-mais-surtout-ergonomiquesRead 23 October 2026Labo Fnac average of 15 h 27 min (15.45 h). Volume and source are not published on the page.

Max sound pressure (measured)iReviewer-measured maximum SPL. Distance, test method and power source belong in source notes.

Not available

87dB12Measurementleclaireur.fnac.com/test/27027-test-labo-de-lultimate-ears-boom-3-des-ameliorations-bienvenues-mais-surtout-ergonomiquesRead 23 October 2026Microphone at 50 cm. Best level 87 dB at 10 percent distortion, measured at 60, 80 and 100 Hz. The 87 dB is the 100 Hz result. Battery power.

Low-frequency extension (measured)iReviewer-measured low-frequency limit. Threshold and test method belong in source notes.

Not available

Not available

High-frequency extension (measured)iReviewer-measured high-frequency limit. Threshold and test method belong in source notes.

Not available

Not available

Audio latency (measured)iReviewer-measured source-to-speaker latency. Source device, app, codec, firmware and connection belong in source notes. App compensation may affect results.

AMarshall Emberton III

Not available

BUltimate Ears BOOM 3

Connection	Latency (ms)
Bluetooth	141

Source12Measurementleclaireur.fnac.com/test/27027-test-labo-de-lultimate-ears-boom-3-des-ameliorations-bienvenues-mais-surtout-ergonomiquesRead 23 October 2026Bluetooth latency of 141 ms. Source device, codec and app are not stated.

Full charge time (measured)iReviewer-measured time from empty to full. Power adapter and method belong in the source note.

Not available

Not available

Dimensions and weight

3 of 3 differ

DimensionsiSpeaker body width, height and depth on explicitly identified axes. Unlabeled tuples do not establish axis meanings. Handle, strap and orientation conditions belong in the source note.

Width160Height68Depth76.9mm(6.3 × 2.7 × 3 in)1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Maker explicitly labels width 160 mm, height 68 mm and depth 76.9 mm. Bare speaker body in normal horizontal orientation, no optional strap. Millimetre cells take precedence over rounded inch figures.

Width73Height184Depth73mm(2.9 × 7.2 × 2.9 in)1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Embedded Specs and Compatibility: height 184 mm, width 73 mm. The archived maker page calls 73 mm the diameter, so width and depth are both 73 mm.

WeightiSpeaker mass including its battery. Excludes packaging, charger and removable carry accessories unless the source states otherwise.

670g(1.5 lb)1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Published speaker weight 0.67 kg converted exactly to 670 g. Built-in battery included, packaging, charger and optional strap excluded.

608g(1.3 lb)1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Embedded Specs and Compatibility: 608 g (21.45 oz).

Body materials

Silicone sleeve, Metal grilles2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Printed page 6 identifies a removable silicone sleeve. Metal grille material is separately supported by the matching hands-on review. The internal enclosure resin and recycled-content percentages are not guessed.9Reviewtomsguide.com/audio/marshal-emberton-iii-reviewRead 8 October 2026Matching Black and Brass third-generation hands-on review explicitly describes metal grilles and rubberized exterior. Maker manual specifically identifies the external sleeve as silicone. No internal chassis alloy is inferred.

Two-tone performance fabric, Rubberised plastic14Reviewtrustedreviews.com/reviews/ultimate-ears-boom-3Read 23 October 2026Top and bottom are rubberised plastic and the main body is a woven fabric.

Certifications

1 of 1 differ

FCC IDs

Not available

Not available

Other certifications

EU Declaration of Conformity (2014/53/EU RED), RoHS (2011/65/EU)11Maker spec sheet (PDF)assets.ctfassets.net/javen7msabdh/2SE8n9eDLitcnYFpyLp9pZ/3c162fcc01bf55d44a326f985152fe5f/Declaration_Of_Conformity_-_EMBERTON_III.pdfRead 8 October 2026Maker exact EMBERTON III EU declaration, English printed page 3, signed January 29, 2024: RED 2014/53/EU and RoHS 2011/65/EU. Model-level EU conformity claim only. No US FCC identifier, battery certificate number or test-score equivalence is inferred.

Not available

In the box

1 of 1 differ

In the box

Emberton III speaker, USB-C charging cable, User manual and legal and safety information1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026Complete selected Black and Brass box list: speaker, USB-C charging cable, user manual/legal/safety information. A strap is supplied only with Brown, which is not this reference. No USB power adapter is listed.

BOOM 3 speaker, Micro-USB cable, Quick Start Guide1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026Package contents: BOOM 3 Speaker, Micro-USB Cable, Quick Start Guide.

Links

Not compared

Product page

www.marshall.com/us/en/product/emberton-iii1Maker product pagemarshall.com/us/en/product/emberton-iiiRead 8 October 2026

www.ultimateears.com/en-us/shop/p/boom-3.984-0013501Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026

Spec sheet

littleredrooster.co.uk/wp-content/uploads/2024/08/UK_Emberton-III-Willen-II-press-release.pdf3Press releaselittleredrooster.co.uk/wp-content/uploads/2024/08/UK_Emberton-III-Willen-II-press-release.pdfRead 8 October 2026Original Marshall-branded four-page August 19, 2024 launch/technical information PDF hosted by its PR agency. This is maker-issued material, not an independently designed retailer datasheet.

www.logitech.com/en-us/products/speakers/bluetooth-speakers/boom-3.html2Maker product pagelogitech.com/en-us/products/speakers/bluetooth-speakers/boom-3.htmlRead 23 October 2026Maker Specs and Details tab: part number, dimensions, weight and the technical specification text.

Manual

assets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdf2Owner's manualassets.ctfassets.net/javen7msabdh/6vPR2v4hd20NkzrsUHx3wX/03f42d56f70763024d6d65a4f36f3bcb/Marshall_Emberton-III_OLM_R1_1_en.pdfRead 8 October 2026Maker English Full Online Manual R1.1, 10 PDF pages, linked from the exact product page. Printed pages 3-7 cover complete layout, charging, controls, battery chemistry and concurrent source connections.

support.logi.com/hc/en-us/articles/18601577361559-Getting-Started-BOOM-34Owner's manualsupport.logi.com/hc/en-us/articles/18601577361559-Getting-Started-BOOM-3Read 23 October 2026Maker Getting Started guide for BOOM 3. No PDF manual was found.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

1 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year5Retailer pagecrutchfield.com/p_972EMBT3BK/Marshall-Emberton-III-Black-and-Brass.htmlRead 8 October 2026Exact currently sold US MFR 1006884 product highlights list warranty 1 year. US source-market warranty only, not a universal regional claim. B&H exact SKU independently corroborates the one-year manufacturer warranty.12Retailer pagebhphotovideo.com/c/product/1840903-REG/marshall_1006884_emberton_iii_black_brass.htmlRead 8 October 2026Exact US Black and Brass SKU items include Limited 1-Year Manufacturer Warranty. Scoped to the US source offer, not every regional statutory right.

2years1Maker product pageultimateears.com/en-us/shop/p/boom-3.984-001350Read 23 October 2026

Both are also in the API. Back to all wireless speakers.