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Amazon Echo Studio (2025 release) vs Marshall Stanmore IV

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Product A: Amazon

Echo Studio (2025 release)

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B

Product B: Marshall

Stanmore IV

42 of 96 known

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Every value links to where we found it.

Only differences

AAmazon Echo Studio (2025 release)

BMarshall Stanmore IV

General

5 of 8 differ

Series

Not available

Not available

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

P8Z7MN2Maker product pagedigprjsurvey.amazon.co.uk/csad/help/node/TYcEB992w5Nz1WU694Read 21 October 2026Safety and Compliance Information for Echo Studio (2025 release): model number P8Z7MN. The US version of the page lists the same model.

1009791, 1009793, 1009296, 1009298, 1009853, 10098541Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Colour selector product ids 1009791 Black and 1009793 Cream, read from the page data. The German store lists 1009296 Black, 1009298 Cream, and also 1009853 Black and 1009854 Cream. John Lewis sells 1009853. Which ids differ by plug or region is not stated.2Maker product pagemarshall.com/de/de/product/stanmore-ivRead 14 October 2026German store page data lists variants STANMORE IV BLACK 1009296 and 1009853, STANMORE IV CREAM 1009298 and 1009854, all priced at EUR 399.11Retailer pagejohnlewis.com/marshall-stanmore-iv-bluetooth-speaker/black/p115377417Read 14 October 2026UK retailer lists manufacturer part number 1009853 for the Black model.

GTIN / EAN

Not available

7340055423571, 73400554236181Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026EAN in the US page data: 1009791 is 7340055423571 and 1009793 is 7340055423618. EANs of the other ids were not found.

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

30 September 20256Press releaseaboutamazon.ca/news/devices/amazon-unveils-its-all-new-echo-lineup-with-premium-audio-and-striking-designRead 21 October 2026Amazon's 2025 devices event, 30 September 2025. The Canadian CAD price on that page is not stored.

7 July 20265Press releasegroup.marshall.com/2026/07/07/marshall-unveils-next-generation-acton-iv-and-stanmore-iv-speakers-for-the-homeRead 14 October 2026Launch release dated 7 July 2026.6Press articlesoundguys.com/marshall-acton-iv-and-stanmore-iv-launch-159646Read 14 October 2026Published 2026-07-07, 8:00 AM ET.

Status

Available1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Amazon US lists Echo Studio (newest model) in Graphite and Glacier White for sale in October 2026, with customer reviews dated up to October 2026.

Available1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Listed on the maker store. The US store showed Sold Out with a Notify Me button on 2026-10-14. The German store and John Lewis take orders.2Maker product pagemarshall.com/de/de/product/stanmore-ivRead 14 October 2026Orderable on the German store.

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

Not available

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

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.

$219.995Press releaseaboutamazon.com/news/devices/amazon-new-echo-devices-alexa-plusRead 21 October 2026Amazon announcement: Echo Studio is now available for $219.99 in the US. US prices exclude sales tax.

$399.996Press articlesoundguys.com/marshall-acton-iv-and-stanmore-iv-launch-159646Read 14 October 2026Launch article of 2026-07-07: Stanmore IV USD 399.99. TechRadar gives USD 399.99 and Tom's Guide USD 399. The US store later shows USD 429.99 and MusicTech reports that figure, so the store price changed or one outlet differs. The launch price is stored. Tax is not included in US list prices.8Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Price and release date: USD 399.99 / GBP 349.99 / AU$679, first released July 2026.

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.

€239.998Press articlemobiflip.de/amazon-echo-studio-neu-2025/ampRead 21 October 2026mobiFlip, 30 September 2025: the new Echo Studio costs 239.99 EUR in Germany. German prices include VAT. hifi.de lists the same list price.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table: list price (UVP) 239.99 EUR, street price about 210 EUR. Germany, VAT included.

€3997Press articlehifi.blog/marshall-acton-iv-and-stanmore-iv-more-room-more-bass-more-marshallRead 14 October 2026Article of 2026-07-08 lists Stanmore IV at EUR 399. Stereonet of 2026-07-09 also gives EUR 399. The German maker store shows EUR 399 including VAT.

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

US, CA, GB, DE6Press releaseaboutamazon.ca/news/devices/amazon-unveils-its-all-new-echo-lineup-with-premium-audio-and-striking-designRead 21 October 2026Canadian availability. The US, UK and German markets are covered by the Amazon US page, Expert Reviews and mobiFlip.8Press articlemobiflip.de/amazon-echo-studio-neu-2025/ampRead 21 October 2026Germany: market launch on 29 October 2025.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026UK review with a UK price of 220 GBP.

US, DE, FR, GB1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026US store page with USD price.2Maker product pagemarshall.com/de/de/product/stanmore-ivRead 14 October 2026German store sells it and shows an add to cart button.11Retailer pagejohnlewis.com/marshall-stanmore-iv-bluetooth-speaker/black/p115377417Read 14 October 2026Sold in the UK at GBP 349.99.12Retailer pageldlc.com/en/product/PB00747537.htmlRead 14 October 2026Sold in France at EUR 399.95 for Black.

ColoursiThe maker's own colour names

Graphite, Glacier White1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Reviews on the page name the color options Graphite and Glacier White. RTINGS says the same two. Tom's Guide says white or black, which is probably Graphite.

Black, Cream1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Colorways: Black, 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.

Home1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026The speaker runs from a power adapter and has no battery. Amazon sells it for large communal spaces, so it is a home speaker.

Home1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Page: Bluetooth home speaker.

Audio

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

Other1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Audio tab: Playback Channels 3.1.1 (left, center, right, height, subwoofer), with Amazon Spatial Audio and Dolby Atmos. RTINGS says it cannot play stereo content without downmixing. The enum has no spatial option, so other is stored.11Measurementrtings.com/speaker/reviews/amazon/echo-studio-2025-bluetoothRead 21 October 2026Review text: the new generation cannot play stereo content without downmixing.

Stereo1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Stereo/mono: Stereo. Sound channels of one speaker.

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.

AAmazon Echo Studio (2025 release)

Driver type	Count	Diameter (mm)
High-excursion woofer	1	95.25
Full-range driver	3	57.15

Source1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Measurements tab: Loudspeaker Driver Dimensions 1x 3.75 inch high excursion woofer and 3x 2.25 inch full-range drivers. Stored as the exact metric conversion of the maker's inches. Tom's Guide, hifi.de and PB Tech give 1.5 inch for the three full-range drivers and Expert Reviews gives 3.25 inch, which conflicts with the maker. The compare table on the same page lists 1x 3.75 inch high excursion woofer and 3x full-range drivers with no size. Per-driver power is not published.

BMarshall Stanmore IV

Driver type	Count	Diameter (mm)
Woofer	1	127
Tweeter	2	19.05

Source1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026One 5 inch woofer and two 0.75 inch tweeters with waveguides. Converted exactly to 127 mm and 19.05 mm. The page lists amplifier ratings only, so no per-driver power is stored. Bass-reflex cabinet, so no passive radiator.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

Not available

Not available

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

110W9Reviewheadphonecheck.com/test/marshall-stanmore-ivRead 14 October 2026Review: three Class D amplifiers, 60 W for the woofer and 2 x 25 W for the tweeters, 110 W in total. The maker lists only the amplifier ratings, with no continuous, RMS or peak basis, so the total goes in the unspecified-rating field. The review also prints 2.99 kg for the weight, which conflicts with the maker's 3.99 kg 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.

30Hz1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Audio tab: Audio Bandwidth 30 Hz to 18 kHz at volume 6. No tolerance is published. This is the acoustic bandwidth, not a Bluetooth range.

36Hz1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Frequency range 36-38,000 Hz. Tolerance and mode are not stated. HeadphoneCheck prints 37 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.

18kHz1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Audio Bandwidth 30 Hz to 18 kHz at volume 6. See the lower limit note.

38kHz1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Frequency range 36-38,000 Hz. Tolerance and mode are not stated.

Signal-to-noise ratio (claimed)

Not available

Not available

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

Not available

Yes8Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026The Marshall app saves three EQ calibrations using a five-band equalizer. The M button cycles them.9Reviewheadphonecheck.com/test/marshall-stanmore-ivRead 14 October 2026App: five presets plus a 5-band EQ with three memory slots.

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

Not available

58Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Five-band equalizer in the Marshall app.9Reviewheadphonecheck.com/test/marshall-stanmore-ivRead 14 October 20265-band EQ.

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Audio Signal Processing lists Automatic Room Adaptation. The page says room adaptation technology analyzes the acoustics of the room and fine-tunes playback.7Press releaseaboutamazon.com/news/devices/amazon-echo-dot-max-echo-studio-sound-quality-bassRead 21 October 2026The speaker analyzes what it plays, detects how the room changes the sound and rebalances its output without manual calibration.

Yes8Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026The app has placement compensation, which optimizes the audio output for the speaker's position. The maker page calls it room calibration. Dynamic Loudness is a separate loudness balance feature.

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

Not available

Not available

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Feature bullets: pair with a second Echo Studio for more powerful sound. A Stereo (Pack of 2) option sells two.3Maker product pagedigprjsurvey.amazon.com/csad/help/node/GZRS8FRPWWFPPZ63Read 21 October 2026Compatible Echo Devices for Stereo Pairs: Echo Studio (2025 release) pairs with another Echo Studio (2025 release) or with an Echo Sub.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table: stereo mode available with further speakers.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026Review: stereo pairing through the Alexa app.

Not available

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

Alexa Multi-Room Music, Alexa Home Theater4Maker product pagedigprjsurvey.amazon.com/csad/help/node/GYYMWGZJUK28FEN6Read 21 October 2026Alexa Home Theater Device Compatibility Guide: Echo Studio (2025 release) works with Fire TV Cube (3rd Gen), Fire TV Stick 4K Max (2nd Gen), Fire TV Stick 4K (2nd Gen) and Fire TV Stick 4K Plus in Configuration 1. Alexa Multi-Room Music comes from the Alexa app's multi-room pairing, which the Amazon US page describes.

Auracast1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Multi-speaker connectivity through Auracast broadcasts. Marshall Heddon, sold separately, is the broadcaster for older Marshall speakers and for Stanmore IV.10Reviewtomsguide.com/audio/smart-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Auracast-enabled and connects to its Homeline IV sibling. Multi-speaker connectivity is listed as unlimited with the Heddon hub. No numeric maximum is stored.

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

54Maker product pagedigprjsurvey.amazon.com/csad/help/node/GYYMWGZJUK28FEN6Read 21 October 2026Configuration 1: up to five Echo speakers plus a subwoofer. The Echo devices listed are Echo Studio (2025 release), Echo Dot Max and Echo Sub. This is the Alexa Home Theater group. No maximum is published for Multi-Room Music groups.

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

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Connectivity

11 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 product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Connectivity tab: A2DP for audio streaming from a mobile device to Echo Studio or from Echo Studio to a Bluetooth speaker.11Measurementrtings.com/speaker/reviews/amazon/echo-studio-2025-bluetoothRead 21 October 2026Public header lists Bluetooth: Yes.

Yes1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026

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

5.31Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Connectivity tab: Bluetooth wireless technology and Bluetooth Low Energy 5.3.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table: Bluetooth 5.3.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026Review lists Wi-Fi 6E and Bluetooth 5.3.12Reviewtomsguide.com/audio/smart-speakers/amazon-echo-studio-2025-reviewRead 21 October 2026Spec box: Bluetooth LE 5.3.

5.31Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Wireless connectivity: Bluetooth 5.3.

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

Not available

SBC, AAC, LDAC, LC31Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Codecs: SBC, AAC (MPEG-2), LDAC, LC3. Receive codecs.

Bluetooth profiles

A2DP, AVRCP1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Connectivity tab: A2DP for audio streaming and AVRCP for voice control of connected mobile devices.

Not available

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

Not available

Yes3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026The factory reset steps name a second Bluetooth entry, STANMORE IV [LE], which is the LE Audio device. HeadphoneCheck and Notebookcheck also state LE Audio support.9Reviewheadphonecheck.com/test/marshall-stanmore-ivRead 14 October 2026Review: Bluetooth 5.3 with LE Audio and Auracast support.

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

Not available

Yes1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Wireless connectivity lists Auracast. FAQ: Stanmore IV is an Auracast receiver and joins a broadcast from a Marshall broadcaster such as Heddon, or from phones with the Listen to Broadcast feature in the Marshall app. It does not state a broadcaster role.4Maker product pagemarshall.com/us/en/support/speakers/support-for-stanmore-ivRead 14 October 2026Stanmore IV is an Auracast receiver and can be added to a multi-speaker setup using a Marshall broadcaster such as Heddon.

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

Not available

Yes1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Bluetooth Multipoint Connectivity: Yes.

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

Not available

23Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Pairing with a Bluetooth device: can connect to 2 Bluetooth 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

10m1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Bluetooth range 10 m / 32.8 ft.

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Connectivity tab: 1x1 Wi-Fi 6E 11a/b/g/n/ac/ax.11Measurementrtings.com/speaker/reviews/amazon/echo-studio-2025-bluetoothRead 21 October 2026Public header lists Wi-Fi: Yes.

No8Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Review states the speaker has no Wi-Fi connectivity.10Reviewtomsguide.com/audio/smart-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Review: Stanmore IV has no Wi-Fi streaming and no voice assistant support.12Retailer pageldlc.com/en/product/PB00747537.htmlRead 14 October 2026Retailer spec: Wi-Fi No. It also lists width 350, height 188 and depth 203 mm, which conflicts with the maker's 350 x 203 x 185 mm and is not used.

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.

802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Connectivity tab: 11a/b/g/n/ac/ax. The Amazon compliance page lists the same standards.2Maker product pagedigprjsurvey.amazon.co.uk/csad/help/node/TYcEB992w5Nz1WU694Read 21 October 2026Wireless features: tri-band Wi-Fi 802.11a/b/g/n/ac/ax (2.4 GHz, 5 GHz and 6 GHz), Bluetooth, Bluetooth Low Energy and Zigbee.12Reviewtomsguide.com/audio/smart-speakers/amazon-echo-studio-2025-reviewRead 21 October 2026Spec box: Wi-Fi 6E 11a/b/g/n/ac/ax.

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.

No9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026No ports at all, so no USB audio.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026Review: no physical connections.12Reviewtomsguide.com/audio/smart-speakers/amazon-echo-studio-2025-reviewRead 21 October 2026Review: no optical audio port. A screw mount on the bottom is not a data port.

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.

AAmazon Echo Studio (2025 release)

Connector	Count	Role
DC power	1	Power input for the included 50 W adapter (30 V DC, 1.66 A device rating)

Source2Maker product pagedigprjsurvey.amazon.co.uk/csad/help/node/TYcEB992w5Nz1WU694Read 21 October 2026No ports are listed. The device electrical rating is 30.0 V DC, 1.66 A. The included adapter PA37NA is rated 100 to 240 V AC input and 30 V DC, 1.667 A, 50 W output. The power port is on the back, as shown on the Amazon US page. Tom's Guide notes a screw mount on the bottom, which is not an electrical port.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table lists no ports. The review says Amazon dropped the old model's analog and optical input.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026Review of 24 November 2025: no physical connections.

BMarshall Stanmore IV

Connector	Count	Role
3.5 mm audio	1	AUX audio input on the top panel
RCA	1	Stereo RCA audio input pair on the bottom panel, preamp required for turntables
AC power	1	Mains power input, 100 to 240 V

Source1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Wired connectivity AUX 3.5 mm and RCA. Mains input voltage 100-240 V. Port positions and roles are from the manual.3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Top panel AUX 3.5 mm audio input. Bottom panel stereo RCA inputs, with an RIAA preamp for turntables, and the mains power input.

Controls and software

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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.

Yes11Measurementrtings.com/speaker/reviews/amazon/echo-studio-2025-bluetoothRead 21 October 2026Public header lists Speakerphone: Yes. Detailed test results are members only.

No1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Microphone system: No.

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.

Amazon Alexa, Alexa+1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Alexa is built in. The page says the speaker is designed to support Alexa+ and includes free Alexa+ access for a limited time. Alexa+ needs a US-based Amazon account.

Not available

Controls

Front buttons for volume down, microphone off and volume up, Tap gestures on top to pause and resume music, dismiss timers, snooze alarms and end calls10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-echo-studio-review-2025Read 21 October 2026Review: front panel with mic mute and volume up and down. Tapping the top pauses and resumes music, dismisses timers, snoozes alarms and ends calls and drop-ins. A light ring shows status.

Bass knob, Treble knob, Volume knob, Power switch, Media jog for play, pause and track change over Bluetooth, Customisable M-button, Source button1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Top panel controls: bass, treble, volume, power switch, media jog, M-button, source button.3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Top panel: AUX input, source selector, audio controls for volume, bass and treble, M-button, media control, power switch. Pull the power switch to turn on.

Companion app

Amazon Alexa1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Software tab: the Alexa app is compatible with Fire OS, Android and iOS devices.

Marshall1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Compatible apps: Marshall app.

App platforms

iOS, Android, Fire OS1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Software tab: the Alexa app is compatible with Fire OS, Android and iOS devices. The web is not an app and is not stored.

iOS, Android3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Closing page offers the Marshall app on Google Play and the App Store.

User firmware updates

Not available

Yes3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Troubleshooting: connect to the Marshall app and follow the in-app instructions to get the latest firmware.4Maker product pagemarshall.com/us/en/support/speakers/support-for-stanmore-ivRead 14 October 2026Ensure the firmware is up to date by connecting the product to the Marshall app.

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

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Lighting modes

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Smart home

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Smart Home tab: Smart Home Hub is Zigbee plus Matter plus Thread Border Router.5Press releaseaboutamazon.com/news/devices/amazon-new-echo-devices-alexa-plusRead 21 October 2026The new Echo devices include a built-in smart home hub with support for Zigbee, Matter and Thread.

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Smart Home tab: Smart Home Hub is Zigbee plus Matter plus Thread Border Router.5Press releaseaboutamazon.com/news/devices/amazon-new-echo-devices-alexa-plusRead 21 October 2026Built-in smart home hub with support for Zigbee, Matter and Thread.

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

Yes1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Smart Home tab: Smart Home Hub is Zigbee plus Matter plus Thread Border Router. The compliance page lists a Zigbee radio.2Maker product pagedigprjsurvey.amazon.co.uk/csad/help/node/TYcEB992w5Nz1WU694Read 21 October 2026Wireless features list a Zigbee radio. Maximum Zigbee EIRP 9.00 dBm.5Press releaseaboutamazon.com/news/devices/amazon-new-echo-devices-alexa-plusRead 21 October 2026Built-in smart home hub with support for Zigbee, Matter and Thread.

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Battery and charging

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Built-in battery

No11Measurementrtings.com/speaker/reviews/amazon/echo-studio-2025-bluetoothRead 21 October 2026Public header lists Battery Powered: No.

No8Reviewtechradar.com/audio/wireless-bluetooth-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Designed for the home and powered from the mains. No battery is mentioned.10Reviewtomsguide.com/audio/smart-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Spec table: Battery life: Mains-powered.

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.

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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.

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

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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.

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Nominal battery voltage

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Battery chemistry

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

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

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Quick charge duration

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

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

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

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USB Power Delivery charging

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Charges other devices

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

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

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Durability

None of 5 known

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

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Floats

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

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

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Carry featuresiPublished handles, straps, carabiners or wheels.

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Measured

None of 6 known

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

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

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

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

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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.

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

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Dimensions and weight

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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.

Width155Height147.3Depth142.2mm(6.1 × 5.8 × 5.6 in)1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Measurements tab: 6.1 in W x 5.6 in D x 5.8 in H (155 mm W x 142.2 mm D x 147.3 mm H). The body is a sphere. hifi.de labels the same numbers as width, height and depth in a different order, which does not match Amazon's labels.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table: 155 x 142.2 x 147.3 mm, labeled width, height and depth. Amazon labels the 142.2 and 147.3 values as depth and height, and Amazon's labels are stored.12Reviewtomsguide.com/audio/smart-speakers/amazon-echo-studio-2025-reviewRead 21 October 2026Spec box: 6.1 x 5.6 x 5.8 inches.

Width350Height203Depth185mm(13.8 × 8 × 7.3 in)1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Physical unit: width 350 mm, height 203 mm, depth 185 mm. The product details block prints 350 x 203 x 185 mm.

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

1,632g(3.6 lb)1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Measurements tab: 57.56 oz (1632 grams), 3.6 lb. The page notes that actual size and weight may vary by manufacturing process. hifi.de and Geizhals agree on 1.63 kg.9Reviewhifi.de/test/amazon-echo-studio-2025-test-255598Read 21 October 2026Spec table: 1.63 kg.12Reviewtomsguide.com/audio/smart-speakers/amazon-echo-studio-2025-reviewRead 21 October 2026Review: 3.6 pounds.

3,990g(8.8 lb)1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Weight 3.99 kg / 8.79 lb.10Reviewtomsguide.com/audio/smart-speakers/marshall-stanmore-iv-reviewRead 14 October 2026Spec table: 8.81 lbs, which matches 3.99 kg.

Body materials

3D knit fabric7Press releaseaboutamazon.com/news/devices/amazon-echo-dot-max-echo-studio-sound-quality-bassRead 21 October 2026Amazon audio engineers: the exterior uses a new 3D knit fabric designed for acoustic transparency.

MDF cabinet, PU leather covering1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026MDF cabinet made from FSC 100%-certified material. The covering is leather-like material, named PU leather in the maker's launch release.5Press releasegroup.marshall.com/2026/07/07/marshall-unveils-next-generation-acton-iv-and-stanmore-iv-speakers-for-the-homeRead 14 October 2026Release names signature PU leather wrapping and an MDF cabinet from FSC 100%-certified wood.

Certifications

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FCC IDs

2BFXH-152313Regulatory filingfccid.io/2BFXH-1523Read 21 October 2026FCC ID 2BFXH-1523, grantee Prime King LLC, equipment class Digital Media Receiver, original grant of 30 September 2025 with 2.4 GHz, 5 GHz and 6 GHz bands. The exhibits are named for model P8Z7MN, including the FCC agent authorization letter and the user manual. Amazon's compliance page says the FCC ID is printed on the device and does not state it, so the match is by the model number in the exhibit names.

Not available

Other certifications

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FSC 100% certified wood for the MDF cabinet (FSC C225755)1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026FSC 100% certified wood (FSC C225755). The claim applies only to the wood cabinet.

In the box

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In the box

Echo Studio (2025 release), Power adapter (50 W), Quick start guide1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Additional details tab: Echo Studio (2025 release), power adapter (50W) and quick start guide.

Stanmore IV speaker, Mains lead, Quick start guide, Legal and safety information1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Box contents: Stanmore IV speaker, mains lead, quick start guide, legal and safety information.

Links

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Product page

www.amazon.com/dp/B0DMQ1QMVV1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Amazon US product page for the Graphite model. The specification tabs were opened one by one in a browser.

www.marshall.com/us/en/product/stanmore-iv1Maker product pagemarshall.com/us/en/product/stanmore-ivRead 14 October 2026Maker's US product page for Stanmore IV.

Spec sheet

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Manual

Not available

assets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdf3Owner's manualassets.ctfassets.net/javen7msabdh/1Rv35yGbbxUe5eqN41fCsx/9c63350f5423c02844068a220dca6e81/Marshall_Stanmore_IV_OLM_260414_R1_2.pdfRead 14 October 2026Full online manual, 260414 R1.2, English first. Combined PDF with many 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.

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Warranty

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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.

1year1Maker product pageamazon.com/dp/B0DMQ1QMVVRead 21 October 2026Additional details tab: 1-year limited warranty and service included. Optional 1, 2 and 3-year extended warranties are sold separately to US customers.

2years13Maker product pagemarshall.com/us/en/policies/warrantyRead 14 October 2026US market. Marshall's policy of 2025-02-13 gives a two-year limited warranty on speakers bought from marshall.com or a US authorized dealer, counted from purchase or delivery. The maker's support page says one year for all products and an exclusive two years for purchases on marshall.com. The two pages differ for dealer purchases, so two years applies to marshall.com purchases only. Statutory rights are excluded.14Maker product pagemarshall.com/us/en/support/warrantyRead 14 October 2026Support page: all products carry a 1-year warranty, and speakers bought online at marshall.com carry an exclusive 2-year warranty.

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