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Amazon Fire TV Soundbar Plus vs KEF XIO

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Product A: Amazon

Fire TV Soundbar Plus

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B

Product B: KEF

XIO

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Only differences

AAmazon Fire TV Soundbar Plus

BKEF XIO

Audio system

8 of 17 differ

System channel configurationiMaker-stated channel layout of the exact package, such as 5.1.2. This can include virtual channels. It is not a count of physical drivers. Optional speakers do not count.

3.11Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Technical details: Speaker Channels 3.1 (built-in subwoofer). The reference package is this soundbar-only listing.

5.1.21Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Product title and spec table: 5.1.2, up to 5.1.2 output channels.

Physical drivers in the packageiCount of physical active speaker drivers across the supplied bar, subwoofer and rear speakers. Passive radiators, microphones and virtual channels do not count. A coaxial driver, such as KEF Uni-Q, counts once, as makers count it.

81Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page text: three full-range speakers, three tweeters and two woofers. That is 8 drivers. What Hi-Fi and Cord Busters repeat it. Expert Reviews lists only tweeters and woofers.9Reviewwhathifi.com/tv-home-cinema/soundbars/amazon-fire-tv-soundbar-plusRead 15 October 2026Review: under the grille are three full-range speakers, three tweeters and two subwoofers. That is 8 drivers, as on the Amazon page.

121Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026All drivers are in the bar. No subwoofer or rear speakers are supplied.

Physical drivers in the bariCount of physical active speaker drivers in the soundbar alone. Passive radiators and virtual channels do not count. A coaxial driver, such as KEF Uni-Q, counts once, as makers count it.

81Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Same page text. All listed drivers are in the bar. No separate subwoofer is in this package.9Reviewwhathifi.com/tv-home-cinema/soundbars/amazon-fire-tv-soundbar-plusRead 15 October 2026Same review text. All listed drivers sit in the bar.

121Maker product pageus.kef.com/products/xio-soundbarRead 15 October 20266 Uni-Q MX plus 2 full-range plus 4 P185 drivers. Each Uni-Q MX counts once, as KEF counts it. KEF also states 12 Class D amplifier channels, 8 for the HF/MF drivers and 4 for the P185 drivers.

Up-firing drivers in the packageiPhysical active drivers explicitly firing upwards across the supplied package. Virtual height channels and passive radiators do not count. A driver that fires upwards only when the bar is wall mounted is not counted.

06Press articleaftvnews.comRead 15 October 2026The article says the bar has no upfiring speakers.7Reviewtechradar.com/televisions/soundbars/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Review: no physical upward-firing speakers. The advertised Dolby Atmos is virtual.9Reviewwhathifi.com/tv-home-cinema/soundbars/amazon-fire-tv-soundbar-plusRead 15 October 2026Review: there are no up-firing speakers. Atmos comes from processing.10Reviewexpertreviews.co.uk/technology/headphones-audio/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Review: the bar has an integrated subwoofer and no up-firing height drivers.

21Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Page: two Uni-Q MX drivers support the two overhead channels. A third Uni-Q MX on the top face is used only when the bar is wall mounted. Three reviews describe this. The count is the two overhead drivers in the standard shelf position.5Maker spec sheet (PDF)images.salsify.com/image/upload/s--BaxUJ50x--/490b1abdf40cac67829ed9c59a357e1827c56377.pdfRead 15 October 2026Brochure: two Uni-Q MX drivers dedicated to the overhead channels complete the 5.1.2 layout.9Reviewwhathifi.com/tv-home-cinema/soundbars/kef-xioRead 15 October 2026Review: three Uni-Q MX drivers sit on the top. The centre one is used only when the bar is wall mounted.

Driver layoutiPublished physical driver layout for the supplied components. A row names one driver type in one component. Do not translate channel count into driver count.

AAmazon Fire TV Soundbar Plus

Component	Driver type	Count
Soundbar	Full-range speaker	3
Soundbar	Tweeter	3
Soundbar	Woofer	2

Source1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page text: three full-range speakers, three tweeters, two woofers. Sizes and orientation are not published.4Maker product pagedigprjsurvey.amazon.com/csad/help/node/TetjfEykAzfQbxXcbPRead 15 October 2026Setup page: three full range speakers, two woofers and three tweeters.9Reviewwhathifi.com/tv-home-cinema/soundbars/amazon-fire-tv-soundbar-plusRead 15 October 2026Review calls the two low-frequency drivers subwoofers. Amazon calls them woofers. Sizes and orientation are not published.

BKEF XIO

Component	Driver type	Count	Diameter (mm)	Orientation
Soundbar	Uni-Q MX coaxial driver	6	50	Three front-facing and three top-facing on a shelf. One top-facing driver is used only when the bar is wall mounted.
Soundbar	Full-range driver	2	50	Not available
Soundbar	P185 racetrack bass driver with VECO	4	Not available	Two opposed pairs in a force-cancelling layout

Source1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: 6 x 50 mm Uni-Q MX drivers, 2 x 50 mm full-range drivers and 4 P185 racetrack bass drivers of 50 x 180 mm with VECO. The racetrack driver has no round diameter, so none is stored. Orientation comes from the reviews listed below.9Reviewwhathifi.com/tv-home-cinema/soundbars/kef-xioRead 15 October 2026Review: three Uni-Q MX face forward and three sit on top. The four P185 drivers form two pairs facing opposite directions. T3 says two drivers fire upward on a shelf. StereoNET says five of the six Uni-Q MX work at one time.

Separate subwoofer includediA separate powered subwoofer is supplied with the reference package. A built-in woofer does not count.

No1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: for more bass consider the Fire TV Soundbar Plus with subwoofer. The listed package has only a built-in subwoofer and a separate subwoofer is not in the box.

No4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026No subwoofer is in the box. The bar has an RCA output and a wireless output for an optional subwoofer.

Included subwoofer connectioniAudio link used by the supplied separate subwoofer. Wireless subwoofers can still require an AC power cable.

Not available

Not available

Included subwoofer driver diameteriPublished diameter of an active driver in the supplied separate subwoofer. Do not use enclosure size or passive radiator size.

Not available

Not available

Rear speakers includediCount of separate rear speaker enclosures supplied with the reference package. Detachable bar ends count when usable as rears. Optional rear speakers do not count.

01Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026The comparison table lists surround speakers only for the bundle with subwoofer and surround speakers. The in-the-box list has none.

04Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026No rear speakers are in the box.

Included rear speaker connectioniAudio link to the supplied rear speaker enclosures. Their power connection is separate.

Not available

Not available

Detachable rear speakersiThe bar has supplied detachable end sections usable as separate rear speakers.

No1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026One-piece bar. The in-the-box list has no detachable end sections.

No4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026The bar is one piece. A wireless surround feature with KEF speakers is announced for a later firmware update.

Compatible optional subwoofersiMaker-named compatible additional subwoofer models. These do not contribute to the reference package layout, dimensions or measurements.

Not available

Not available

Compatible optional rear speakersiMaker-named compatible additional rear speaker models. These do not contribute to the reference package layout, dimensions or measurements.

Not available

Not available

Total RMS audio output poweriMaker-stated RMS or rated continuous amplifier output for the exact supplied package. Peak or unspecified maximum claims do not qualify. Distortion, load and rating conditions belong in the source note. Power consumption is separate.

Not available

Not available

Total peak audio output poweriMaker-stated peak or maximum amplifier output for the exact supplied package. This is separate from RMS or continuous output and from electrical consumption. Rating conditions belong in the source note.

Not available

820W1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026EU spec table: 820 W instantaneous total power rating. No RMS figure is published. The US page does not show the amplifier row.

Published frequency response lower limitiMaker-published lower limit for the exact supplied package. Tolerance and test conditions belong in the source note. Reviewer extension measurements are separate.

Not available

34Hz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: 34 Hz to 20 kHz at plus or minus 3 dB, measured at 85 dB at 1 m.

Published frequency response upper limitiMaker-published upper limit for the exact supplied package. Tolerance and test conditions belong in the source note.

Not available

20kHz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Same row as the lower limit.

Audio formats

7 of 9 differ

Dolby AtmosiExplicit support for Dolby Atmos playback. Transport codec and connection restrictions belong in source notes.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Technical details: Surround Sound Supported Dolby Atmos, DTS:X. Best results over HDMI ARC or eARC. Atmos here is virtual because the bar has no up-firing drivers (TechRadar).

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table lists Dolby Atmos.

DTS:XiExplicit support for DTS:X playback. Virtual surround processing alone does not establish DTS:X decoding.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Technical details: Surround Sound Supported Dolby Atmos, DTS:X. The bar has no up-firing drivers.

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table lists DTS:X.

Supported audio formatsiAudio formats explicitly decoded by the device. Codec and connection restrictions belong in source notes. Bluetooth codecs and music-file formats are separate.

Dolby Digital, DTS, Dolby Atmos, DTS:X5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026LED chart: one green light for Dolby Digital or DTS playback, three green lights for Dolby Atmos or DTS:X playback. No connection is named.

Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, DTS:X, Sony 360 Reality Audio, MPEG-H, LPCM1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table lists Dolby Atmos, DTS:X, 360 Reality Audio, MPEG-H and LPCM. The FAQ also names Dolby TrueHD and Dolby Digital Plus over eARC when the TV supports them.

Audio formats by connectioniExplicitly supported audio decoding combinations. Max input channels counts decoded input audio channels, including LFE. A 5.1 layout has 6 channels and 7.1 has 8. Output speaker layouts and Atmos objects do not count. Atmos over Dolby Digital Plus and over Dolby TrueHD are separate rows. Format support on one input does not prove support on another.

AAmazon Fire TV Soundbar Plus

Connection	Format
HDMI eARC	Dolby Atmos
HDMI eARC	DTS:X
HDMI ARC	Dolby Atmos

Source1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: for playback in Dolby Atmos and DTS:X connect to the HDMI ARC or eARC port of the TV. Reviewers say DTS:X works only over eARC, so no DTS:X row is stored for ARC.4Maker product pagedigprjsurvey.amazon.com/csad/help/node/TetjfEykAzfQbxXcbPRead 15 October 2026Setup page: optical connections do not support Dolby Atmos or DTS:X. HDMI ARC or eARC is used for Atmos.

BKEF XIO

Connection	Format	Max input channels
HDMI eARC	5.1 Surround (compressed)	6
HDMI eARC	5.1 Surround (uncompressed)	6
HDMI eARC	Dolby Atmos	Not available
HDMI eARC	DTS:X	Not available
HDMI eARC	Sony 360 Reality Audio	Not available
HDMI eARC	MPEG-H	Not available
HDMI ARC	5.1 Surround (compressed)	6
HDMI ARC	Dolby Atmos	Not available
HDMI ARC	MPEG-H	Not available
Optical	5.1 Surround (compressed)	6
Network	5.1 Surround (compressed)	6
Network	Dolby Atmos	Not available
Network	DTS:X	Not available
Network	Sony 360 Reality Audio	Not available
Network	MPEG-H	Not available

Source4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 11.1 Compatibility with XIO (printed page 90). Optical: compressed 5.1 only. HDMI eARC: compressed and uncompressed 5.1, Dolby Atmos, DTS:X, Sony 360 Reality Audio and MPEG-H. HDMI ARC: compressed 5.1, Dolby Atmos and MPEG-H. Wireless: compressed 5.1 and all four object formats. The wireless column is stored as the network connection. Compatibility depends on the source and the content. A 5.1 layout has 6 channels. The table gives no channel count for the object formats.

Music file formatsiPublished local or network music-file playback formats. Playback route and app restrictions belong in source notes.

MP36Press articleaftvnews.comRead 15 October 2026The article says the USB port plays MP3 files from a USB drive. No other file formats are stated.

FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM, Ogg Vorbis1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM and Ogg Vorbis. Playback runs over the network and depends on the source device.

Max wired audio sample rateiHighest explicitly published supported sample rate for decoded wired audio input. Name the exact HDMI, ARC, eARC or optical connection and codec in source notes. This is the published route limit, not proof of a device-wide maximum across all inputs. Local or network music-file limits and Bluetooth do not qualify. A chipset limit is not device evidence.

Not available

192kHz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: HDMI eARC up to 192 kHz and 24 bit. Optical is limited to 96 kHz and 24 bit.

Max music file sample rateiHighest explicitly published supported local or network music-file sample rate. Name the playback route and file format in source notes. This is the published route and format limit, not proof of a device-wide maximum across all music formats. Wired HDMI or optical input and Bluetooth are separate.

Not available

384kHz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: network up to 384 kHz and 24 bit, depending on the source resolution.

Max wired audio bit depthiHighest explicitly published supported bit depth for decoded wired audio input. Name the exact HDMI, ARC, eARC or optical connection and codec in source notes. This is the published route limit, not proof of a device-wide maximum across all inputs. Local or network music-file limits and Bluetooth do not qualify.

Not available

24bits1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Same row as the eARC sample rate. All routes are 24 bit.

Max music file bit depthiHighest explicitly published supported local or network music-file bit depth. Name the playback route and file format in source notes. This is the published route and format limit, not proof of a device-wide maximum across all music formats. Wired HDMI or optical input and Bluetooth are separate.

Not available

24bits1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Network route, 24 bit.

Connectivity

5 of 17 differ

Ports on the bariPhysical connectors on the soundbar alone. Record input, output, ARC or eARC, service, subwoofer and power roles explicitly. Count identical connectors per row. Component connectors are described in source notes.

AAmazon Fire TV Soundbar Plus

Connector	Count	Version	Role
HDMI	1	ARC/eARC	HDMI ARC/eARC connection to the TV
Optical	1	Not available	Digital audio input
USB-A	1	Not available	USB audio playback from a USB drive
AC power	1	Not available	Soundbar power input

Source5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Meet your Fire TV Soundbar Plus, back view: optical port, HDMI port, USB port and power port. Screw holes for wall mounting sit on the bottom. The HDMI port is the TV connection and its text says HDMI ARC/eARC.

BKEF XIO

Connector	Count	Version	Role
HDMI	1	2.1 eARC	HDMI eARC and ARC connection to the TV. There is no HDMI input.
Optical	1	Not available	TOSLINK digital audio input
Ethernet	1	Not available	RJ45 network port
USB-C	1	Not available	Service port
Subwoofer	1	Not available	RCA subwoofer output
AC power	1	Not available	AC power input

Source1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Inputs: HDMI 2.1 eARC, TOSLINK optical, USB Type C for service and RJ45 Ethernet. Outputs: wireless subwoofer output and RCA subwoofer output. The wireless output is a radio link to the KW2 RX receiver and not a connector. The back panel photo in the manual also shows the AC input.4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Quick start guide back panel: reset button, Bluetooth pairing button, IPT switch, power switch, service port, subwoofer output, optical input, AC input, HDMI eARC input and network port.

HDMI ARC

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: connect to the HDMI ARC or eARC port on your TV.

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026

HDMI eARC

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: connect to the HDMI ARC or eARC port on your TV. Cord Busters also names eARC.

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: HDMI 2.1 eARC. The same port also carries ARC.

HDMI-CEC

Yes5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Connect to your TV with HDMI, step 2: check that your TV's HDMI CEC setting is enabled.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 6.1: turn on HDMI CEC in the TV settings.

HDMI video passthroughiCan pass video from a dedicated HDMI source input to a television output. ARC or eARC alone does not qualify.

No7Reviewtechradar.com/televisions/soundbars/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Design section: the HDMI port is ARC-enabled and the reviewer would have liked a second HDMI passthrough port. The bar has one HDMI port.8Reviewcordbusters.co.uk/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Review: the bar lacks an HDMI output port, so it uses up one TV HDMI port.

No4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026The only HDMI connector is the eARC and ARC connection to the TV. FAQ 8: the HDMI port is for connecting to a TV and not for sources.

Video passthrough modesiPublished supported passthrough combinations, not inferred maxima at untested resolutions. State chroma, bit depth, HDR and firmware restrictions in source notes.

Not available

Not available

HDR passthrough formats

Not available

Not available

VRR passthrough

Not available

Not available

ALLM passthrough

Not available

Not available

HDCP versioniHighest HDCP version the maker states for an HDMI port of the soundbar, such as 2.3. When the source inputs and the TV output differ, the source input version is stored. A bar with no HDMI input stores the version of its TV output, also when that output carries video from a built-in streaming player.

Not available

Not available

Bluetooth audio inputiCan receive audio from a Bluetooth source. A Bluetooth remote alone does not qualify.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Technical details: Bluetooth Support Yes.

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026

Bluetooth versioniPublished version of the soundbar audio connection. An optional remote or detachable rear can use a different version.

58Reviewcordbusters.co.uk/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Spec list: Wireless Bluetooth 5. No minor version and no codecs are stated.

5.31Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: Bluetooth 5.3. No codec list is published.

Bluetooth audio codecsiExplicitly supported codecs for received Bluetooth audio. A Bluetooth version alone does not establish a codec.

Not available

Not available

Wi-Fi

No7Reviewtechradar.com/televisions/soundbars/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Review: no built-in streaming like Roku soundbars, no Alexa and no app.8Reviewcordbusters.co.uk/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Review: no streaming capabilities are built in and there is no Alexa or other smart feature. The maker's connectivity row is HDMI, Optical, Bluetooth, USB. No Wi-Fi is listed by any source.

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026

Wi-Fi standardiPublished Wi-Fi standards for the soundbar, written as 802.11 names without IEEE, such as "802.11a/b/g/n/ac/ax". A Wi-Fi generation is written as its standard, so Wi-Fi 5 is "802.11ac" and Wi-Fi 6 is "802.11ax". Do not infer the standard from frequency bands.

Not available

802.11a/b/g/n/ac/ax1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: IEEE 802.11a/b/g/n/ac/ax. The manual router requirements list 802.11a/b/g/n/ac. The spec table is used.

Wi-Fi bandsiPublished radio bands, such as 2.4 GHz and 5 GHz.

Not available

2.4 GHz, 5 GHz, 6 GHz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: 2.4 GHz, 5 GHz and 6 GHz.

Built-in Ethernet speediRated speed of the built-in port. An optional adapter does not count.

Not available

Not available

Streaming and control

6 of 8 differ

Streaming protocolsiNamed network playback protocols, such as AirPlay 2, Google Cast, Spotify Connect and Tidal Connect. Bluetooth is separate.

Not available

AirPlay 2, Google Cast, Spotify Connect, Tidal Connect, UPnP, QPlay1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: KEF Connect, AirPlay, Google Cast, UPnP and Bluetooth. Streaming services: Spotify via Spotify Connect, Tidal via Tidal Connect and QQ Music via QPlay. The features list names multiroom through AirPlay 2 and Google Cast.

Voice assistantsiNamed assistants supported by the soundbar. Built-in and external-device routes and market restrictions belong in source notes.

Not available

Siri, Google Assistant4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 7.4: Siri controls playback while an iOS device streams to the XIO. Google Assistant does the same for an Android device. The bar has no built-in assistant and What Hi-Fi? lists no voice control.

Built-in microphoneiPhysical microphone in the bar for voice or calibration. An external setup phone or remote microphone does not count.

Not available

Yes9Reviewwhathifi.com/tv-home-cinema/soundbars/kef-xioRead 15 October 2026Review: built-in microphones allow the XIO to measure the room and detect walls and furniture. Tom's Guide and T3 also mention built-in microphones. The maker pages do not state a microphone.

Microphone mute controliA physical control on the soundbar explicitly disables its built-in voice microphone. State whether this is an electrical switch or software-controlled button when known.

Not available

Not available

Companion apps

Not available

KEF Connect4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026The KEF Connect app sets up and controls the bar.

Companion app platforms

Not available

iOS, Android4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 4.4.1: KEF Connect for iOS 14 or above and Android 10 or above.

Multiroom audioiCan play synchronised audio with other rooms through a supported network platform. Optional surround expansion alone does not qualify.

Not available

Yes1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Features list: multiroom via AirPlay 2 and Google Cast. TechRadar says the bar has no multiroom option. The maker and the manual say it has.4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 7.3 Multi-Room Streaming: AirPlay and Google Cast groups.

Remote includediA separate remote control supplied with the reference package. Phone apps and TV remotes do not count.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026In the box: Remote. The page says a TV remote is not included.5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Meet your remote page and the included items page show the soundbar remote and 2 AAA batteries.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026In the Box: remote control with two AAA batteries.

Sound processing

4 of 7 differ

Sound modes

Movie, Music, Sports, Night1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Technical details: EQ Modes Movie, Music, Sports, Night.

Default, Music, Movie, Night, Dialogue, Direct4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 10.4.5 sound profiles: Default, Music, Movie, Night, Dialogue and Direct. The remote has two sound profile buttons that default to Dialogue and Night.

Automatic room calibrationiExplicit acoustic measurement or analysis used to adapt playback to the room. Manual EQ alone does not qualify. Setup phone requirements belong in source notes.

Not available

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 10.4.2 Calibrate with IPT: it adjusts the EQ to the listening environment in about 45 seconds. The app also asks for the soundbar height and the room size.

Room calibration system

Not available

Intelligent Placement Technology (IPT)4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 10.4.2 names Intelligent Placement Technology.

Dialogue enhancementiA dialogue or voice mode counts, also when the maker lists it as an EQ preset.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: Dialogue Enhancer elevates voices above background sounds.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Dialogue sound profile: it emphasises vocal frequencies and reduces background noise.

Night mode

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page: Night mode gives crisp dialogue at low volumes and minimized bass.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Night sound profile: it compresses the dynamic range for quiet listening.

Equalizer controlsiPublished user-adjustable EQ controls. Bass and treble controls are distinct from multi-band EQ.

Bass, Treble5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Remote: Treble and Bass buttons, each with levels 1 to 9. Dialogue Enhancer levels 1 to 5.

Treble trim, Bass extension, High-pass frequency, Subwoofer low-pass frequency, Subwoofer gain4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 10.4.4 Expert Mode: Treble Trim minus 3.0 to plus 3.0 dB, Bass Extension Less, Standard or Extra, High-Pass Frequency 50 to 120 Hz, Sub Out Low-Pass Frequency 40 to 250 Hz and Sub Gain minus 3.0 to plus 3.0 dB.

TV speaker integrationiNamed features allowing compatible television speakers to play with the bar. TV models and connection requirements belong in source notes.

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Power

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Published operating poweriMaker-published operating electrical consumption of the soundbar alone. Included subwoofer and rear-speaker consumption do not count. Keep workload and method in source notes. Audio amplifier output is separate.

Not available

400W1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026US spec table: 400 W maximum operating power. The EU page says 401 W. The manual says 400 W and is used. Idle power is 20 W.

Published standby poweriMaker-published non-networked standby consumption of the bar alone. Networked standby and other components are separate.

Not available

0.45W4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 15.5: Non wireless mode standby 0.45 W with HDMI auto wake-up. The spec table says under 0.5 W for Non Wi-Fi mode. The same section lists Non Wi-Fi mode standby as 1.5 W, so the 0.45 W row is used as the bar with all radios off.

Published networked standby poweriMaker-published networked standby consumption of the bar alone. Enabled radio and network conditions belong in source notes.

Not available

1.8W4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 15.5: ECO Standby (Network Standby) 1.8 W. The spec table says under 2.0 W. Standby with high power is 3 W.

Power supplyiPublished AC input range or external DC adapter arrangement. Electrical input ratings are not operating consumption.

AC 100-240 V, 50/60 Hz, 30 W electrical rating3Maker product pagedigprjsurvey.amazon.com/csad/help/node/T5e2dahaqpkYECRdZTRead 15 October 2026Product specifications: Electrical Rating 100-240V ~ 50/60Hz, 30W. This is the electrical rating of the bar and not an operating consumption figure.

AC 100-240 V, 50/60 Hz1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: power input 100-240 V AC, 50/60 Hz.

Detachable rear battery lifeiMaker-stated runtime of the supplied detachable rear speakers. Volume, mode and recharge conditions belong in source notes.

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Detachable rear charge timeiMaker-stated full recharge time of supplied detachable rear speakers. Charging route belongs in source notes.

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Measured

None of 8 known

Low-frequency extension (measured)iReviewer-measured lower extension for the exact tested package. Test threshold, mode, room correction and configuration belong in source notes.

Not available

Not available

High-frequency extension (measured)iReviewer-measured upper extension for the exact tested package. Test threshold and configuration belong in source notes.

Not available

Not available

Max sound pressure (measured)iReviewer-measured maximum sound pressure. Signal, distance, sound mode and supplied or optional speaker configuration belong in source notes.

Not available

Not available

Frequency response deviation (measured)iReviewer-measured standard error against the stated target. Target, averaging range, preset and test method belong in source notes.

Not available

Not available

Measured latencyiReviewer-measured audio latency. Keep source/TV, firmware, codec, synchronisation correction and exact tested speaker configuration in source notes. Negative offsets are valid when the method reports them.

Not available

Not available

Operating power (measured)iReviewer-measured operating consumption of the soundbar alone. Optional or supplied external speakers do not count. Workload and enabled radio conditions belong in source notes.

Not available

Not available

Standby power (measured)iReviewer-measured bar-only standby consumption. Network state and test conditions belong in source notes.

Not available

Not available

Soundbar weight (measured)iReviewer-measured bar-only weight. Excludes subwoofer, rears, mounting hardware and cables.

Not available

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Dimensions and weight

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Soundbar dimensionsiBar alone in its normal tabletop orientation, without detachable rears, wall brackets or external cables. A source that includes detachable ends must use component_dimensions instead. A size labelled L x W x H, as on Amazon, is width x depth x height.

Width942Height64Depth131mm(37.1 × 2.5 × 5.2 in)2Maker product pageamazon.ca/dp/B0CXZTT4MTRead 15 October 2026Technical details: Soundbar Size (LxWxH) 94.2 x 13.1 x 6.4 cm. That is length (width) 942, depth 131, height 64 mm. The US page gives 37 x 5.2 x 2.5 in, which agrees within inch rounding.

Width1,210Height70Depth165mm(47.6 × 2.8 × 6.5 in)1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: 70 x 1210 x 165 mm (H x W x D), 2.8 x 47.6 x 6.5 inches.

Soundbar weightiBar alone, without detachable rears, subwoofer, wall brackets or external cables. Source-published masses including detachable ends belong in component_dimensions.

4,000g(8.8 lb)2Maker product pageamazon.ca/dp/B0CXZTT4MTRead 15 October 2026Technical details: Soundbar Weight 4.0 kg. The US page gives 8.8 lb, which agrees.

10,500g(23.1 lb)1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Spec table: 10.5 kg (23.1 lbs).

Component dimensions and weightiPublished dimensions and mass for named supplied components, including a bar with detachable rears attached when stated. Each row describes one enclosure, not the pair, unless the component label explicitly states a set. Width, height and depth use normal installed orientation.

Not available

Not available

Package dimensions

Not available

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Package weightiShipping package including supplied components and packaging.

Not available

Not available

Wall mountable

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026In the box: Wall mount kit. The bar has two mounting holes on the bottom (Amazon safety page).5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Mounting the soundbar on the wall section.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Section 4.6: wall mounting with the supplied template and brackets. The bar can also stand on a TV cabinet.

In the box

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In the box

Fire TV Soundbar Plus, Remote, HDMI 2.0 cable, AC power cord, AAA batteries (2), Wall mount kit, Quick start guide1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Included in the box: Fire TV Soundbar Plus, Remote, HDMI 2.0 Cable, 1 AC Cord, 2 AAA Batteries, Wall mount kit, Quick Start Guide.5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Also included page: High Speed HDMI cable, power cord and 2 AAA batteries, plus the wall mounting accessories.

XIO soundbar, Remote control, AAA batteries, HDMI cable (2 m), Power cable (2 m), Wall mounting template, Wall mounting kit, Printed materials4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026In the Box (printed page 7): XIO, remote control, AAA batteries, printed materials, HDMI cable (2 m), power cable (2 m), wall mounting template and wall mounting kit. The kit drawing shows two small parts, each marked x4.

Wall mount hardware includediSupplied bar mounting brackets or mount. Screws alone do not establish that a complete mount is included.

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026In the box: Wall mount kit.5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Wall mounting accessories: paper template, 2 anchors, 2 wall screws, 2 soundbar screws and 2 brackets.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026Wall mounting template and wall mounting kit are in the box.5Maker spec sheet (PDF)images.salsify.com/image/upload/s--BaxUJ50x--/490b1abdf40cac67829ed9c59a357e1827c56377.pdfRead 15 October 2026Brochure: the soundbar includes a wall-mount kit as a default feature.

HDMI cable included

Yes1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026In the box: HDMI 2.0 Cable.

Yes4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026HDMI cable of 2 m is in the box.

Optical cable included

No4Maker product pagedigprjsurvey.amazon.com/csad/help/node/TetjfEykAzfQbxXcbPRead 15 October 2026Setup page: connect to the TV optical port using an optical cable (sold separately).5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Other TV connection options: optical cable sold separately.

No4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026No optical cable appears in the In the Box page.

General

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Series

Fire TV Soundbar Plus Series1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026Page text: Meet the Fire TV Soundbar Plus Series. The series has a soundbar only, a soundbar with subwoofer and a soundbar with subwoofer and surround speakers.

Not available

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

HM34BR3Maker product pagedigprjsurvey.amazon.com/csad/help/node/T5e2dahaqpkYECRdZTRead 15 October 2026Amazon Safety and Compliance page for the soundbar only: Model Number HM34BR. The bundle with subwoofer lists HM24BR and HM24SW instead.

SP4083M0AA, SP4083B0AA, SP4083M0BA, SP4083B0BA, SP4083M0CA, SP4083B0CA1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026US store lists SP4083M0CA for Silver Grey and SP4083B0CA for Slate Black. The UK store lists the BA models and the EU store the AA models. All six are stored.2Maker product pageuk.kef.com/products/xio-soundbarRead 15 October 2026UK store lists SP4083M0BA and SP4083B0BA.3Maker product pageeu.kef.com/products/xio-soundbarRead 15 October 2026EU store lists SP4083M0AA and SP4083B0AA.

GTIN / EAN

Not available

637203051142, 637203051210, 637203051159, 637203051227, 637203051166, 6372030512341Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026Barcodes (gtin12) from the page data of each store. US 637203051166 (Silver Grey) and 637203051234 (Slate Black). UK 637203051159 and 637203051227. EU 637203051142 and 637203051210.2Maker product pageuk.kef.com/products/xio-soundbarRead 15 October 2026UK barcodes 637203051159 (Silver Grey) and 637203051227 (Slate Black).3Maker product pageeu.kef.com/products/xio-soundbarRead 15 October 2026EU barcodes 637203051142 (Silver Grey) and 637203051210 (Slate Black).

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

14 November 20246Press articleaftvnews.comRead 15 October 2026AFTVnews article date 14 November 2024. Amazon Japan opened pre-orders the same day.

8 July 20256Press articlecepro.com/news/xio-soundbar-from-kef-complements-modern-smart-home-living/619921Read 15 October 2026CEPro article of 8 July 2025 reports the new XIO soundbar from KEF. UK early access for members started the same day.

Status

Available1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026The page is live. The listing carries a rating count and shows no discontinued notice.

Available1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026The product page is live in every store and lists a price.

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

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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

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

$249.996Press articleaftvnews.comRead 15 October 2026US price of the soundbar only: $249.99. Excludes sales tax. The subwoofer and surround bundles were $374.99 and $489.99.

$2,499.991Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026US page shows 2,499.99 USD, no tax included. This matches the launch price in July 2025 trade coverage. See the CEPro source.6Press articlecepro.com/news/xio-soundbar-from-kef-complements-modern-smart-home-living/619921Read 15 October 2026Article quotes KEF: available for a retail price point of 2,499.99 USD. US price, tax 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.

Not available

€2,2993Maker product pageeu.kef.com/products/xio-soundbarRead 15 October 2026EU and German stores show 2,299 EUR including VAT. The launch price is confirmed by the hifi.de test source below.7Reviewhifi.de/test/kef-xio-test-236581Read 15 October 2026hifi.de test of 9 July 2025 gives the manufacturer's recommended price of 2,299 EUR. Germany, VAT included.

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, DE1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026US from this Amazon US page.2Maker product pageamazon.ca/dp/B0CXZTT4MTRead 15 October 2026CA from this Amazon Canada page for the same ASIN.8Reviewcordbusters.co.uk/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026UK review of the bar sold in the UK with UK and EU power cables.11Press articlechina-gadgets.deRead 15 October 2026German article from January 2026 says the Soundbar Plus is sold on Amazon Germany at 189.99 euro.

US, GB, EU1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026US, UK and EU KEF stores sell the XIO. Other regions may exist and are not stored.2Maker product pageuk.kef.com/products/xio-soundbarRead 15 October 2026UK store, price 1,999 GBP. No GBP price field exists in the schema.3Maker product pageeu.kef.com/products/xio-soundbarRead 15 October 2026EU store, priced in euro. The German store shows the same models and price.

ColoursiThe maker's own colour names

Black7Reviewtechradar.com/televisions/soundbars/amazon-fire-tv-soundbar-plus-reviewRead 15 October 2026Design section: all the units come in a matte black.

Silver Grey, Slate Black1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026US and UK stores name the colours Silver Grey and Slate Black. The EU store adds (EU) to each name.2Maker product pageuk.kef.com/products/xio-soundbarRead 15 October 2026UK store names the colours Silver Grey and Slate Black.3Maker product pageeu.kef.com/products/xio-soundbarRead 15 October 2026EU store names the colours Silver Grey (EU) and Slate Black (EU).

Links

Not compared

Product page

www.amazon.com/dp/B0CXZTT4MT1Maker product pageamazon.com/dp/B0CXZTT4MTRead 15 October 2026

us.kef.com/products/xio-soundbar1Maker product pageus.kef.com/products/xio-soundbarRead 15 October 2026KEF US product page. The spec table, features and variants below were read from this page and the same table on the KEF UK and EU pages.

Spec sheet

Not available

images.salsify.com/image/upload/s--BaxUJ50x--/490b1abdf40cac67829ed9c59a357e1827c56377.pdf5Maker spec sheet (PDF)images.salsify.com/image/upload/s--BaxUJ50x--/490b1abdf40cac67829ed9c59a357e1827c56377.pdfRead 15 October 2026KEF XIO soundbar brochure with the specification table. Linked from the KEF product page.

Manual

d1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdf5Owner's manuald1o9vk2qokce73.cloudfront.net/S3+Cloudfront/FireTV/Fire+TV+Soundbar/FireTV_SoundbarPlus_Online_QSG_NA_EN.pdfRead 15 October 2026Fire TV Soundbar Plus quick start guide, 4 pages, file 22-005394-01. The PDF has no text layer. Read through OCR and by eye.

images.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdf4Owner's manualimages.salsify.com/image/upload/s--yy9XvVWq--/aac3398ff8d2a938345e79dd74360807b5aeffa0.pdfRead 15 October 2026XIO user manual, 2025 V10, English. KEF links it from the product page.

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

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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/B0CXZTT4MTRead 15 October 2026US: 1-year limited warranty and service.2Maker product pageamazon.ca/dp/B0CXZTT4MTRead 15 October 2026Canada page also states a 1-year limited warranty.

Not available

Both are also in the API. Back to all soundbars.