Wireless speakers / Compare

Harman Kardon Onyx Studio 9 vs Marshall Middleton II

A

Product A: Harman Kardon

Onyx Studio 9

54 of 96 known

Change Harman Kardon Onyx Studio 9

Compare the Marshall Middleton II with

Search wireless speakers

B

Product B: Marshall

Middleton II

51 of 96 known

Change Marshall Middleton II

Compare the Harman Kardon Onyx Studio 9 with

Search wireless speakers

All 96 fields

Every value links to where we found it.

Only differences

AHarman Kardon Onyx Studio 9

BMarshall Middleton II

General

6 of 8 differ

Series

Onyx Studio1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Maker sheet is titled Onyx Studio 9. Series name from the Onyx Studio line.

Not available

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

HKOS9BLKEP, HKOS9GRYEP, HKOS9BLKAM8Retailer pagepood.datafox.ee/harman-kardon-onyx-studio-9-portable-speakerRead 16 October 2026Manufacturer code HKOS9GRYEP, the grey EU item.9Retailer pagepood.datafox.ee/harman-kardon-onyx-studio-9-speakerRead 16 October 2026Manufacturer code HKOS9BLKEP, the black EU item.10Retailer pageep-online.ch/catv/de/p/1475591/onyx-studio-9Read 16 October 2026HKOS9GRYEP.11Retailer pagepanacompu.com/panama/en/product-information/harman-kardon-onyx-studio-9-portable-wireless-speaker-bluetooth-blackRead 16 October 2026Listing gives model and part number HKOS9BLKAM, the Americas black item.

1007428, 1007429, 10096441Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026US store page. Product ids in the page data: 1007428 Black and Brass, 1007429 Cream and 1009644 Black and Brass sold on the US store. The EU stores sell 1007428.2Maker product pagemarshall.com/de/de/product/middleton-iiRead 11 October 2026German store sells 1007428 Black and Brass and 1007429 Cream.

GTIN / EAN

1200130014116, 12001300182378Retailer pagepood.datafox.ee/harman-kardon-onyx-studio-9-portable-speakerRead 16 October 2026Listing gives EAN 1200130018237 for HKOS9GRYEP. The ep-online listing gives the same code.9Retailer pagepood.datafox.ee/harman-kardon-onyx-studio-9-speakerRead 16 October 2026Listing gives EAN 1200130014116 for HKOS9BLKEP. The ep-online listing gives the same code.10Retailer pageep-online.ch/catv/de/p/1475591/onyx-studio-9Read 16 October 2026Swiss listing for HKOS9GRYEP gives EAN 1200130018237 and net weight 3.33 kg.

7340055404594, 7340055404617, 73400554203721Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026EAN values in the store page data: 1007428 is 7340055404594, 1007429 is 7340055404617, 1009644 is 7340055420372. Read from the German and US store pages.2Maker product pagemarshall.com/de/de/product/middleton-iiRead 11 October 2026EAN 7340055404594 for 1007428 and 7340055404617 for 1007429 in the store page data.

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

September 20244Press articlephileweb.com/sp/news/d-av/202410/31/61425.htmlRead 16 October 2026Japanese trade report dated 31 October 2024 says the speaker was first shown at a September 2024 event.

1 July 20255Press releasegroup.marshall.com/2025/07/01/marshall-reveals-their-latest-portable-powerhouse-middleton-iiRead 11 October 2026Press release dated 2025-07-01: Middleton II launches globally today on Marshall.com.

Status

Available5Reviewt3.com/tech/bluetooth-speakers/harman-kardon-onyx-studio-9-reviewRead 16 October 2026Review lists current retail offers.

Available1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Offered for sale on the maker store in October 2026.

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

Not available

Marshall Middleton10Reviewtomsguide.com/audio/bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026Tom's Guide calls the Middleton II the successor to the original Marshall Middleton.14Reviewengadget.com/audio/speakers/marshalls-new-middleton-ii-bluetooth-speaker-lasts-30-hours-between-charges-164354372.htmlRead 23 October 2026Engadget calls the Middleton II a direct replacement for the first-generation Middleton from 2023.

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

Not available

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

$299.955Reviewt3.com/tech/bluetooth-speakers/harman-kardon-onyx-studio-9-reviewRead 16 October 2026Review says the official US price is $299.95. 9to5Toys says the model originally launched at $300. Tax treatment is not stated.

$329.991Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026US store price $329.99, before US sales tax. TechRadar gives the same list price at launch in July 2025.9Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026List price $329.99 / 259.99 GBP / AU$499, released July 2025.

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.

Not available

€2992Maker product pagemarshall.com/de/de/product/middleton-iiRead 11 October 2026German store price 299 EUR including VAT. Kopfhoerer.de reports the same 299 EUR launch price on 2025-07-01.8Press articlekopfhoerer.de/news/marshall-middleton-iiRead 11 October 2026News of 2025-07-01: available from 1 July 2025 for 299 EUR on marshall.com, retail from 15 July.

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

US, EU11Retailer pagepanacompu.com/panama/en/product-information/harman-kardon-onyx-studio-9-portable-wireless-speaker-bluetooth-blackRead 16 October 2026The AM code is the US item code. Panama sells the same item.

US1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026US store page and US launch price.

ColoursiThe maker's own colour names

Classic Black, Stone Grey3Press releasenews.harmankardon.com/en-GB/245491-harman-kardon-onyx-studio-9-combines-timeless-design-with-innovative-new-featuresRead 16 October 2026Available in Classic Black and Stone Grey. UK press release dated 6 January 2025 with UK availability from February 2025 at 229.99 GBP.4Press articlephileweb.com/sp/news/d-av/202410/31/61425.htmlRead 16 October 2026Japan sells it in Classic Black and Light Grey.

Black and Brass, Cream1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Colourways: Black and Brass, Cream.

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 spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Maker title: portable stereo Bluetooth home speaker with a built-in battery and an integrated handle.

Portable1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Marshall lists it as a portable speaker.

Audio

10 of 18 differ

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

Stereo1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Maker title says stereo. Constant Sound Field mixes the music to a three-channel system with a dedicated center channel and two tweeters.

Stereo1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Stereo/mono: Stereo. Sound channels of one speaker, not a paired set.

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.

AHarman Kardon Onyx Studio 9

Driver type	Count	Diameter (mm)
Woofer	1	120
Tweeter	3	20

Source1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Woofer 1 x 120 mm and tweeter 3 x 20 mm. One tweeter is the center channel and two face the sides, per the Fnac lab. No per-driver power is published.

BMarshall Middleton II

Driver type	Count	Diameter (mm)
Woofer	2	76.2
Tweeter	2	15.24

Source1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Drivers: 2 x 3 inch woofer, 2 x 0.6 inch tweeter, 2 passive radiators. Sizes converted exactly to mm. The page lists amplifier ratings only, so no per-driver power is stored.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

Not available

21Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 20262 passive radiators.

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.

50W1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Rated output power 50 W RMS. No separate battery and mains rating is published.

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

80W12Press articlewhathifi.com/speakers/wireless-speakers/marshalls-second-gen-middleton-speaker-aims-for-a-sound-thats-fit-for-royaltyRead 11 October 2026Launch article: 60 watts of Class D amplification for the twin 7.6 cm woofers and 20 watts for the pair of 15 mm tweeters. The maker lists four amplifiers, 2 x 30 W and 2 x 10 W. The 80 W total is the sum of these amplifier ratings, and a spec database also lists 80 W. No continuous, RMS or peak basis is stated, so it goes in the unspecified-rating field.13Spec databasefrontum.co.uk/portable-speakers/marshall-middleton-iiRead 11 October 2026Spec database lists audio output power 80 W. It also lists a 45 Hz lowest frequency, which conflicts with the maker's 50 Hz and is not used.

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.

50Hz1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 202650 Hz to 20 kHz at -6 dB.

50Hz1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Frequency range 50Hz - 20kHz. Tolerance and mode are not stated. One database lists 45 Hz, which is not used.

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 spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 202650 Hz to 20 kHz at -6 dB.

20kHz1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Frequency range 50Hz - 20kHz. Tolerance and mode are not stated.

Signal-to-noise ratio (claimed)

80dB1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Published as greater than 80 dB. The stored number is the lower bound.

Not available

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

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026The Harman Kardon One app customizes the EQ.

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Page: bass and treble controls on the top panel and in the Marshall Bluetooth app. The Abt spec sheet states an equaliser in the app.7Maker spec sheet (PDF)content.abt.com/documents/174754/marshall-portable-bluetooth-speaker-1007428-spec-sheet-1.pdfRead 11 October 2026Maker spec sheet hosted by a retailer: equaliser yes, bass and treble on units and equaliser in app.

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

75Reviewt3.com/tech/bluetooth-speakers/harman-kardon-onyx-studio-9-reviewRead 16 October 2026The Customize preset opens a seven-band EQ with plus or minus 12 dB from below 120 Hz to above 8 kHz.

59Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026The Marshall Bluetooth app has a five-band equalizer and a small set of presets. Tom's Guide and HeadphoneCheck also state five bands.10Reviewtomsguide.com/audio/bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026The app can update firmware, check battery life and adjust the 5-band EQ.

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

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Self-Tuning: when you power on, the speaker automatically calibrates to its environment.

Not available

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

Signature Sound, Vocal, Energetic, Chill5Reviewt3.com/tech/bluetooth-speakers/harman-kardon-onyx-studio-9-reviewRead 16 October 2026App listening presets: Signature Sound, Vocal, Energetic, Chill and Customize. Customize is the manual EQ and is not stored as a mode.12Reviewcellphones.com.vn/sforum/danh-gia-harman-kardon-onyx-studio-9Read 16 October 2026Review lists the same app presets: Signature Sound, Vocal, Energetic, Chill.

Not available

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

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Two Onyx Studio 9 speakers can be paired wirelessly for a wider stereo soundstage.2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Stereo boost pairing section: pair for left and right channels, with swap and unpair steps.

No9Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026Review says it would have liked multi-speaker pairing, which is available on some other Marshall models. The page and manual list no pairing feature. Review also says there is no placement compensation.

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

Auracast1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Multi-speaker connection by Auracast with two or more Harman Kardon speakers or compatible speakers from other brands. The sheet says as many speakers as you want, with no number.3Press releasenews.harmankardon.com/en-GB/245491-harman-kardon-onyx-studio-9-combines-timeless-design-with-innovative-new-featuresRead 16 October 2026Auracast connects to another Onyx Studio 9 or any other Auracast-enabled Harman Kardon speaker.

Not available

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

Not available

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

6 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.

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026

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

5.31Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Bluetooth 5.3.

5.31Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Wireless connectivity: Bluetooth 5.3.

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

Not available

SBC, AAC, LC31Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Codecs: SBC, AAC-mpeg 2 and LC3. Receive codecs.

Bluetooth profiles

A2DP 1.4, AVRCP 1.61Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026A2DP 1.4 and AVRCP 1.6.

Not available

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

Not available

Yes5Press releasegroup.marshall.com/2025/07/01/marshall-reveals-their-latest-portable-powerhouse-middleton-iiRead 11 October 2026Product manager quote: with support for LE Audio, listeners can enjoy a more efficient and enhanced listening experience.8Press articlekopfhoerer.de/news/marshall-middleton-iiRead 11 October 2026Article states the Bluetooth speaker supports LE Audio.

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

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Auracast button on the speaker or in the app. Sending and receiving roles are not stated.

Yes9Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026Features: Auracast connectivity. The app can tune into a live broadcast via Auracast. Receiving role.11Reviewheadphonecheck.com/test/marshall-middleton-iiRead 11 October 2026Review says the speaker is Auracast-enabled and the app can search for Auracast broadcasts.

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

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Pairs with up to two mobile devices simultaneously.

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Bluetooth Multipoint Connectivity: Yes.

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

22Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Multi-point connection section: maximum 2 devices.

23Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Pairing a new device: can be connected with 2 devices at a time and remembers up to 8 previously paired devices.

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

Not available

60m1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Bluetooth range 60 m, 200 ft.

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

No6Measurementleclaireur.fnac.com/test/589784-test-labo-harman-kardon-onyx-studio-9Read 16 October 2026Lab review says there is no Wi-Fi, so no AirPlay 2 or Chromecast.7Retailer pageldlc.pro/fr-be/fiche/PB00671696.htmlRead 16 October 2026Retailer spec table lists Wi-Fi: no.

Not available

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.

Not available

Not available

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

Not available

Not available

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.

AHarman Kardon Onyx Studio 9

Connector	Count	Role
AC power	1	Mains power input and battery charging
3.5 mm audio	1	AUX audio input. The cable is not included
USB-C	1	Charge output for mobile devices, rated 5 V / 2.1 A max. Service port outside the US. On the US version it also plays MP3 files

Source2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Guide shows a power cord, a section on playing music through an audio cable (cable not included) and a USB-C powerbank section. Tech spec: USB audio playback is for the US version only. Other versions use USB for service only. Supported file format mp3.6Measurementleclaireur.fnac.com/test/589784-test-labo-harman-kardon-onyx-studio-9Read 16 October 2026Back panel: mains cable, auxiliary input and a USB-C port that only charges another device.

BMarshall Middleton II

Connector	Count	Role
3.5 mm audio	1	Audio input
USB-C	1	Charging input and power-bank output

Source1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Wired connectivity AUX 3.5mm. Power input USB-C. The USB-C power output role is the charging bank feature.

Controls and software

4 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.

No7Retailer pageldlc.pro/fr-be/fiche/PB00671696.htmlRead 16 October 2026Retailer spec table lists built-in microphone: no and no voice assistant.

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Microphone system: Yes. Built-in microphone for hands-free calls.

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, Bluetooth pairing, Volume up and down, Play/pause, next and previous track (one, two or three presses), Auracast multi-speaker connection2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Bluetooth pairing, music streaming (one press, two presses, three presses), Auracast multi-speaker connection and a reboot by holding for more than 10 seconds.5Reviewt3.com/tech/bluetooth-speakers/harman-kardon-onyx-studio-9-reviewRead 16 October 2026Top controls handle on/off, separate volume up and down, play/pause, Bluetooth connection and a separate Auracast button.

Multidirectional control knob for play/pause, track skip, volume and calls, Power button, Bluetooth pairing button, Bass control, Treble control, 10-segment battery indicator3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Device layout: power button, Bluetooth button, 10 segment battery indicator, control knob, microphone, bass and treble control. Knob: push for play/pause and calls, left/right to skip, up/down for volume.

Companion app

Harman Kardon One1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Harman Kardon One app.

Marshall Bluetooth1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Compatible apps: Marshall Bluetooth app.

App platforms

Android, iOS12Reviewcellphones.com.vn/sforum/danh-gia-harman-kardon-onyx-studio-9Read 16 October 2026Review says the Harman Kardon One app works on Android and iOS.

iOS, Android3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Page 9 offers the Marshall Bluetooth app and the closing page names Google Play and the App Store.10Reviewtomsguide.com/audio/bluetooth-speakers/marshall-middleton-ii-reviewRead 11 October 2026Spec table compatibility: iOS, Android, Bluetooth and 3.5 mm wired devices.

User firmware updates

Yes2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Use the Harman Kardon One app for speaker configuration and software upgrade.

Yes3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Troubleshooting: connect to the Marshall Bluetooth app and follow the in-app instructions to get the latest firmware.

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

11 of 17 differ

Built-in battery

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Built-in rechargeable battery.

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Rechargeable Li-ion battery. The page says replaceable, but no user replacement procedure is published, so replaceable_battery is not stored.

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.

8h1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Up to 8 hours, depending on volume level and audio content. No test volume is stated.

30h1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Play time 30+ hours, stored as 30. The legal notice states play time is calculated with a random selection of music at medium volume.

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.

17.15Wh1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Sheet says Li-ion 17.15 Wh. The Fnac lab and an Amazon-based retailer listing give 17.14 Wh. 3.63 V times 4722 mAh is 17.14 Wh.

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.

4,722mAh1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Published as equivalent to 3.63 V / 4722 mAh.

Not available

Nominal battery voltage

3.63V1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Published as equivalent to 3.63 V / 4722 mAh.

Not available

Battery chemistry

Lithium-ion1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Li-ion.

Lithium-ion1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Battery type: Rechargeable, replaceable, Li-ion battery.

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

Yes3Press releasenews.harmankardon.com/en-GB/245491-harman-kardon-onyx-studio-9-combines-timeless-design-with-innovative-new-featuresRead 16 October 2026Press release lists a consumer replaceable battery. The replacement method is not described.

Not available

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

4h1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 20264 hours. The speaker charges from its AC power cable.

3h1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 20263 hours to full recharge. Charger rating is not stated for this figure.

Quick charge duration

Not available

20min1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Quick charging: 20 minutes gives 5 hours of playtime.

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

Not available

5h1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 202620 minutes gives 5 hours of playtime.

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

100-240 V AC, 50/60 Hz1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Power supply 100-240 V AC, 50/60 Hz. No input current is published.

USB-C, 5 V / 9 V / 12 V / 20 V at 3 A1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Power input: USB-C 5V/9V/12V/20V-3A.

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

Not available

31.6W4Maker spec sheet (PDF)assets.ctfassets.net/javen7msabdh/2ed2WkyZQKGwrdTnX9IQsq/a34297273e818f93e2e047fd6a03e43e/Middleton_II_-_Legal_and_safety_-_2025-12-08_R1.2_CN.pdfRead 11 October 2026Charger power must be between a minimum of 12.8 W required by the radio equipment and a maximum of 31.6 W to achieve the maximum charging speed. Stored as the maximum charging input.

USB Power Delivery charging

Not available

Yes4Maker spec sheet (PDF)assets.ctfassets.net/javen7msabdh/2ed2WkyZQKGwrdTnX9IQsq/a34297273e818f93e2e047fd6a03e43e/Middleton_II_-_Legal_and_safety_-_2025-12-08_R1.2_CN.pdfRead 11 October 2026This product supports USB PD fast charging. Multi-language legal notice, English text.

Charges other devices

Yes1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026The USB charging port recharges a mobile device. Rating 5 V / 2.1 A (max). No watt figure is stored.2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Powerbank section. The charging cable is not included.

Yes1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Features: charging bank, use the speaker to charge your phone on the go. The manual requires more than 20% battery charge.

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

2 of 5 differ

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

Not available

IP671Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026IP67: protected against dust and sand, tested to work after 30 minutes in 1 m of water.

Floats

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Carry featuresiPublished handles, straps, carabiners or wheels.

Integrated handle1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Integrated handle, made with 90% recycled aluminum.

Carry strap3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Carrying strap hinge and an included carrying strap.

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.

11.65h6Measurementleclaireur.fnac.com/test/589784-test-labo-harman-kardon-onyx-studio-9Read 16 October 2026Labo Fnac measured 11 h 39 min on average over two measurements at 70 dB at 50 cm from the speaker. This is far above the 8 hour claim because the test volume is low. Review published 18 April 2025.

Not available

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

Not available

Not available

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

63Hz6Measurementleclaireur.fnac.com/test/589784-test-labo-harman-kardon-onyx-studio-9Read 16 October 2026Lab says the bandwidth covers 63 Hz to 20 kHz. Anechoic chamber, Bluetooth source, no audio profiles or settings active. The level threshold is not stated.

Not available

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

20kHz6Measurementleclaireur.fnac.com/test/589784-test-labo-harman-kardon-onyx-studio-9Read 16 October 2026Lab says the bandwidth covers 63 Hz to 20 kHz. The level threshold is not stated.

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.

Not available

Not available

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.

Width289.2Height287.5Depth130mm(11.4 × 11.3 × 5.1 in)1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Product dimensions are listed as width x height x depth: 289.2 x 287.5 x 130 mm. Package is 312 x 322 x 172 mm.

Width230Height110Depth98mm(9.1 × 4.3 × 3.9 in)1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Physical unit: width 230 mm, height 110 mm, depth 98 mm. The page spec box prints L230*W98*H110 mm and also labels width, height and depth separately with the same values.

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

3,360g(7.4 lb)1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Net weight 3.36 kg and gross weight 4.2 kg. Swiss and French retailers list the speaker at 3.33 kg and the Fnac lab says 3.3 kg. Package weight is 4.2 kg.

1,800g(4 lb)1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Weight 1.8 kg / 3.9 lbs.

Body materials

Aluminum frame, Fabric, Silicone buttons1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Integrated aluminum frame, fabric and silicone buttons on top. The handle is made with 90% recycled aluminum.

Silicone sleeve, Tolex covering3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Cleaning section: the silicone sleeve can be removed and cleaned separately.11Reviewheadphonecheck.com/test/marshall-middleton-iiRead 11 October 2026Review describes Marshall's signature snakeskin-style Tolex covering. TechRadar calls it faux leather.

Certifications

None of 1 known

FCC IDs

Not available

Not available

Other certifications

Not available

Not available

In the box

1 of 1 differ

In the box

Harman Kardon Onyx Studio 9, Power cable, Quick start guide, Safety sheet, Warranty card1Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026Box list: speaker, power cable, quick start guide, safety sheet and warranty card. The audio cable is not included.

Middleton II speaker, Carry strap, USB-C charging cable, Quick start guide, Legal and safety information1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Box contents: speaker, strap, USB-C charging cable, quick start guide, legal and safety information.

Links

Not compared

Product page

Not available

www.marshall.com/us/en/product/middleton-ii1Maker product pagemarshall.com/us/en/product/middleton-iiRead 11 October 2026Maker's product page for Middleton II.

Spec sheet

www.regard.ru/api/site/files/goodspdf/download/113321Maker spec sheet (PDF)regard.ru/api/site/files/goodspdf/download/11332Read 16 October 2026

Not available

Manual

elmir.ua/response/product-instruction.php2Owner's manualelmir.ua/response/product-instruction.phpRead 16 October 2026Quick start guide in many languages, hosted by a retailer. No full owner's manual was found on a readable host.

assets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdf3Owner's manualassets.ctfassets.net/javen7msabdh/52ltpkI3c7wiY1XvINbpPD/bf15b800425c3408d16fc26bed07601d/Marshall_Middlton_II_OLM_R1_5_Combined.pdfRead 11 October 2026Full online manual R1.5, English on pages 3 to 12. Combined PDF with 40 languages.

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

None of 1 known

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.

Not available

Not available

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