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ULTIMEA Poseidon M30 vs Yamaha True X Surround 90A

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Product A: ULTIMEA

Poseidon M30

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B

Product B: Yamaha

True X Surround 90A

74 of 98 known

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Every value links to where we found it.

Only differences

AULTIMEA Poseidon M30

BYamaha True X Surround 90A

Audio system

11 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.

2.11Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Speaker Channels 2.1.

5.1.23Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Setup menu lists levels for Front L/R, Center, Height L/R, Subwoofer and Surround L/R. That is 5 channels, 1 subwoofer and 2 height channels. Reviewers and US retailers also state 5.1.2. Maker pages and the guide do not print the figure for the full package.

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.

31Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Total Number of Speakers 3.

247Reviewwhathifi.com/tv-home-cinema/soundbars/yamaha-true-x-surround-90aRead 13 October 202619 drivers in the bar (guide), 1 woofer in the subwoofer and 2 full-range drivers in each of the two WS-X3A speakers. Passive radiators are not counted. Review text describes two active drivers and two passive radiators in each WS-X3A.

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.

21Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Drivers Mainbar 2.25 inch x 2 + 5.25 inch x 1, so two drivers in the bar. Overview: 3 Delicate Speakers, Mica Material.

193Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Specifications, speaker section: Front L/R 2 cone and 2 dome, Center 2 cone and 1 dome, Height 12 cone. That is 19. The maker product page lists the center as 1 cone and 2 dome instead. The total is 19 either way. The guide counts are stored.

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.

Not available

123Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Guide: height beam array speakers are located toward the ceiling at the left and right ends of the bar and reflect sound off the ceiling. What Hi-Fi? says six drivers fire up from each end. Sound beams are DSP-steered, not separate angled drivers.

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.

AULTIMEA Poseidon M30

Component	Driver type	Count	Diameter (mm)
Soundbar	Mica-reinforced driver	2	57.15
Subwoofer	Woofer	1	133.35

Source1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Mainbar 2.25 inch x 2 and a 5.25 inch driver. 2.25 inch is 57.15 mm and 5.25 inch is 133.35 mm. The overview says the diaphragms are mica. The page does not state driver orientation.

BYamaha True X Surround 90A

Component	Driver type	Count	Diameter (mm)	Orientation
Soundbar	Full-range cone driver, 110 x 53 mm	4	Not available	Front
Soundbar	Dome tweeter	3	25	Front
Soundbar	Height beam driver	12	28	Upward-facing array, six at each end of the top
Subwoofer	Woofer	1	170	Not available
Rear speakers (two enclosures)	Full-range driver, 2-1/4 in	4	Not available	Not available

Source3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Bar and subwoofer from the guide specifications. Dome tweeters 2.5 cm, height drivers 2.8 cm, subwoofer 17 cm. Rear speaker drivers from the maker product page spec table: two full-range drivers and two passive radiators per rear speaker. Passive radiators are not counted.

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

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes a Subwoofer Power Cable and the key specs list a 5.25 inch sub driver. The Amazon listing names a separate wireless subwoofer.

Yes2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026

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

Wireless3Retailer pageamazon.com/dp/B0GHRSHDT1Read 15 October 2026Product information: Subwoofer Connectivity Technology Wireless. The wireless subwoofer connects without audio cables.

Wireless2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026Wireless subwoofer link on 5 GHz. The subwoofer still needs its own power cord.

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

133.35mm1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: 5.25 inch, which is 133.35 mm. The 18 mm figure on the Amazon listing is the driver excursion, not the diameter.

170mm3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026

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 pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit list names no rear speakers. The product is one 2.1 bar with a subwoofer.

25Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026Package includes two wireless surround speakers with charging cradles and wall-mount brackets.

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

Not available

Wireless5Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026

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

No1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The kit list and photos show one bar with no detachable end sections. The Dual-unit Design text describes a segmented speaker layout inside the bar.

No5Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026The rear speakers are separate wireless units. The bar has no detachable end sections.

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.

240W1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key features: 240W Peak Power. No RMS rating is published.

Not available

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.

50Hz1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Frequency Range 50Hz-18kHz. The Amazon listing says 45 Hz to 18 kHz. The maker page and the manual agree on 50 Hz, so 50 is stored.

33Hz3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Subwoofer speaker section: 33 Hz to 120 Hz. Tolerance not published.

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

18kHz1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Frequency Range 50Hz-18kHz.

20kHz3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Front and center tweeters 3.2 kHz to 20 kHz. Tolerance not published.

Audio formats

8 of 9 differ

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

No1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The page, the box photo and the kit list name no Dolby format.

Yes1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026Overview page and spec table list Dolby Atmos, DTS:X and AURO-3D as surround decoders.

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

No1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The page, the box photo and the kit list name no DTS format.

Yes1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026

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.

Not available

Linear PCM, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos over Dolby Digital Plus, Dolby Atmos over Dolby TrueHD, DTS, DTS 96/24, DTS-ES Discrete 6.1, DTS-ES Matrix 6.1, DTS Express, DTS-HD High Resolution Audio, DTS-HD Master Audio, DTS:X, AURO-3D3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Bitstream and PCM formats listed for HDMI IN and eARC. ARC and optical support fewer formats, see audio_format_connections.

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.

AULTIMEA Poseidon M30

Not available

BYamaha True X Surround 90A

Connection	Format	Max input channels
HDMI input	Linear PCM 2ch	2
HDMI eARC	Linear PCM 2ch	2
HDMI ARC	Linear PCM 2ch	2
Optical	Linear PCM 2ch	2
HDMI input	Linear PCM multi-channel	8
HDMI eARC	Linear PCM multi-channel	8
HDMI input	Dolby Digital	Not available
HDMI input	Dolby Digital Plus	Not available
HDMI input	Dolby TrueHD	Not available
HDMI input	Dolby Atmos over Dolby Digital Plus	Not available
HDMI input	Dolby Atmos over Dolby TrueHD	Not available
HDMI input	DTS	Not available
HDMI input	DTS 96/24	Not available
HDMI input	DTS-ES Discrete 6.1	Not available
HDMI input	DTS-ES Matrix 6.1	Not available
HDMI input	DTS Express	Not available
HDMI input	DTS-HD High Resolution Audio	Not available
HDMI input	DTS-HD Master Audio	Not available
HDMI input	DTS:X	Not available
HDMI input	AURO-3D	Not available
HDMI eARC	Dolby Digital	Not available
HDMI eARC	Dolby Digital Plus	Not available
HDMI eARC	Dolby TrueHD	Not available
HDMI eARC	Dolby Atmos over Dolby Digital Plus	Not available
HDMI eARC	Dolby Atmos over Dolby TrueHD	Not available
HDMI eARC	DTS	Not available
HDMI eARC	DTS 96/24	Not available
HDMI eARC	DTS-ES Discrete 6.1	Not available
HDMI eARC	DTS-ES Matrix 6.1	Not available
HDMI eARC	DTS Express	Not available
HDMI eARC	DTS-HD High Resolution Audio	Not available
HDMI eARC	DTS-HD Master Audio	Not available
HDMI eARC	DTS:X	Not available
HDMI eARC	AURO-3D	Not available
HDMI ARC	Dolby Digital	Not available
HDMI ARC	Dolby Digital Plus	Not available
HDMI ARC	Dolby Atmos over Dolby Digital Plus	Not available
HDMI ARC	DTS	Not available
HDMI ARC	DTS 96/24	Not available
HDMI ARC	DTS-ES Discrete 6.1	Not available
HDMI ARC	DTS-ES Matrix 6.1	Not available
Optical	Dolby Digital	Not available
Optical	DTS	Not available
Optical	DTS 96/24	Not available
Optical	DTS-ES Discrete 6.1	Not available
Optical	DTS-ES Matrix 6.1	Not available

Source3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Guide, Supported digital audio signal formats. Channel counts are published only for PCM. Bitstream channel counts are not published, so they are left out. ARC lacks Dolby TrueHD, DTS-HD and DTS:X. Optical lists 2-channel PCM, Dolby Digital, DTS, DTS 96/24 and DTS-ES.

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

Not available

WAV (PCM), FLAC, AIFF, Ogg Vorbis, ALAC, MP3, WMA, Ogg Opus3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Network audio function. WAV (PCM only), FLAC, AIFF and Ogg Vorbis up to 384 kHz, ALAC up to 96 kHz, MP3, WMA and Ogg Opus up to 48 kHz.

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

192kHz3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026HDMI IN and eARC: 2-channel and multi-channel Linear PCM up to 192 kHz, 24 bit. Optical is limited to 96 kHz.

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

384kHz3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Network playback of WAV (PCM), FLAC, AIFF and Ogg Vorbis. ALAC is limited to 96 kHz.

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

24bits3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026HDMI IN and eARC Linear PCM, 16, 20 or 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

Not available

Connectivity

13 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.

AULTIMEA Poseidon M30

Connector	Count	Role
HDMI	1	HDMI ARC connection to the TV
Optical	1	Digital audio input
Other	1	USB port for audio input, connector type not stated
DC power	1	DC IN for the external power adapter, 18 V 2 A

Source1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs connectivity: Optical x 1, USB Port x 1, HDMI x 1, Power Input 18V/2A. The page does not state the USB connector type.

BYamaha True X Surround 90A

Connector	Count	Version	Role
HDMI	1	Not available	HDMI IN, audio and video input
HDMI	1	eARC	HDMI OUT/TV, video output and eARC or ARC audio input from the TV
Optical	1	Not available	Digital audio input
Ethernet	1	100BASE-TX	Network
USB-A	1	Not available	Firmware update only
AC power	1	Not available	Power input

Source3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Rear panel part names and specifications. The USB port is for firmware updates only. The HDMI OUT jack carries eARC and ARC from the TV. Subwoofer and rear speakers link wirelessly.

HDMI ARC

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Setup text: connect HDMI between TV and soundbar, then press ARC on the remote. The Amazon listing names HDMI ARC.3Retailer pageamazon.com/dp/B0GHRSHDT1Read 15 October 2026Connectivity Technology: HDMI ARC, Optical, Bluetooth 6.0.

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026HDMI OUT/TV (eARC) jack. ARC mode is documented separately from eARC.

HDMI eARC

No3Retailer pageamazon.com/dp/B0GHRSHDT1Read 15 October 2026The maker brand listing names the port HDMI ARC and makes no eARC claim. The maker page says only HDMI x 1.

Yes2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026

HDMI-CEC

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Overview: Sync Your Devices with CEC. Control your soundbar and TV with one remote.

Yes2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026

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

No1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The bar has one HDMI port, used for the ARC link to the TV. The page names no HDMI input for a source device.

Yes2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 20264K Pass-through: Yes.

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

AULTIMEA Poseidon M30

Not available

BYamaha True X Surround 90A

Width (px)	Height (px)	Refresh rate (Hz)
3840	2160	60
1920	1080	120

Source3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Supported HDMI video signal formats list 4K at 60, 50, 30, 25 and 24 Hz and 1080p at 120, 100, 60, 50 and 24 Hz. Only the highest rate of each is stored. Maker pass-through spec text gives no chroma or bit depth.

HDR passthrough formats

Not available

HDR10, HLG, Dolby Vision, HDR10+3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Supported HDR video signals: HDR10, HLG, Dolby Vision and HDR10+.

VRR passthrough

Not available

Not available

ALLM passthrough

Not available

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Supported HDMI feature: ALLM. VRR is not listed.

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

2.33Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Copyright protection: HDCP 2.3 and HDCP 1.4.

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

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Sink function receives audio from a smartphone or tablet. A source function can send to Bluetooth headphones.

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

6.01Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Bluetooth 6.0.

4.22Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026

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

Not available

SBC, AAC2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026

Wi-Fi

No3Retailer pageamazon.com/dp/B0GHRSHDT1Read 15 October 2026Wireless Technology: Bluetooth 6.0. The maker lists a separate Poseidon M30 Stream with Wi-Fi streaming.

Yes2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 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/ac3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Wireless LAN standards: IEEE 802.11 a/b/g/n/ac, 20 MHz channel bandwidth only.

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

Not available

2.4 GHz, 5 GHz3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026

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

Not available

100Mbps3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Network jack, 100BASE-TX.

Streaming and control

4 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, Spotify Connect, TIDAL Connect, MusicCast1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026Overview page lists Wi-Fi, Bluetooth, AirPlay 2, Spotify Connect and TIDAL Connect.

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

Not available

Not available

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

Not available

Not available

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

Ultimea1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Overview: Smart App Control with the Ultimea App.

MusicCast Controller1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026

Companion app platforms

iOS, Android7Maker product pageultimea.com/pages/appRead 15 October 2026The Ultimea App page shows App Store and Google Play download badges. The M30 box photo carries the same badges.

Android, iOS3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Guide app page links Google Play and the App Store for MusicCast Controller.

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

Not available

Yes1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026MusicCast multi-room audio, link with other MusicCast devices.

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

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes: x1 Remote Control. Key specs: Remote Control Type IR Signal.

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026

Sound processing

3 of 7 differ

Sound modes

Movie, Music, Voice, Sport, Game, Night1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Listening Modes (EQ) Movie, Music, Voice, Sport, Game, Night.

SURROUND:AI, 3D Music, Straight, Stereo, All3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Sound mode list: SURROUND:AI (default), 3D MUSIC, STRAIGHT, STEREO and ALL. ALL needs the wireless speakers.

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

No6Reviewtomsguide.com/audio/soundbars/yamaha-true-x-surround-90a-reviewRead 13 October 2026Review states the system lacks a room calibration tool. The maker guide lists only manual beam angle, focal length and ceiling height settings.

Room calibration system

Not available

Not available

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

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Overview: Crystal-Clear Dialogue, Voice MX enhances vocal clarity by dynamically optimizing speech frequencies.

Yes1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 20263Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Clear Voice key.

Night mode

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Night is one of the listening modes.

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Setup > Sound > Volume > Dynamic Range. The Min/Auto setting is described as suitable for nighttime or low volume listening. The maker does not call it a night mode.

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

10-band equalizer (app)1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Overview: 10 Bands Equalizer Settings in the Ultimea App and 121 preset EQ matrices.

Bass, Treble, Bass Extension3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Tone Control Treble and Bass, -12 to +12. Bass Extension is a separate on or off key.

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

Not available

Not available

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

54W3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026General, power consumption 54 W for the sound bar. No workload is stated. The subwoofer is 24 W and is not included.

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

0.5W4Owner's manualmanuals.plus/ultimea/poseidon-m30-2-1-channel-soundbar-with-wireless-subwoofer-manualRead 15 October 2026Copy of the user manual power section: standby below 0.5 W. Stored as 0.5 and published as below 0.5. Read from a search excerpt of the page.

0.5W2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 20260.5 W with HDMI control, pass through, network standby and Bluetooth off. The subwoofer has its own 2.0 W standby and is not included.

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

Not available

2W2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 20262.0 W with network standby on, bar only. The subwoofer standby is separate.

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

Soundbar: external power adapter, DC 18 V 2 A. Wireless subwoofer: AC 100-240 V, 50/60 Hz, own power cable.1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Key specs: Power Input 18V/2A for the soundbar. The kit has a Power Adaptor and a Subwoofer Power Cable, so the subwoofer has its own mains power. The manual copy gives the subwoofer input as 100-240 V AC.4Owner's manualmanuals.plus/ultimea/poseidon-m30-2-1-channel-soundbar-with-wireless-subwoofer-manualRead 15 October 2026Copy of the user manual: Power supply DC 18V 2A (Soundbar), 100-240V~50/60Hz AC (Subwoofer). Read from a search excerpt of the page.

AC 100 to 120 V, 50/60 Hz (U.S.A. and Canada models)3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Models for U.S.A. and Canada. Other regions use 220 to 240 V.

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

Not available

10h4Owner's manualusa.yamaha.com/files/download/other_assets/5/2380285/AV24-0029_WS-X3A_user_guide_En_G_A1.pdfRead 13 October 2026WS-X3A specifications: about 10 hours in SURROUND mode and about 12 hours in SOLO mode, fully charged, IEC 62396-1. The Surround figure is stored. Varies with use.

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

Not available

4h4Owner's manualusa.yamaha.com/files/download/other_assets/5/2380285/AV24-0029_WS-X3A_user_guide_En_G_A1.pdfRead 13 October 2026About four hours with a DC 5 V, 2 A USB adapter.

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

Not available

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.

Width600Height70Depth90mm(23.6 × 2.8 × 3.5 in)4Owner's manualmanuals.plus/ultimea/poseidon-m30-2-1-channel-soundbar-with-wireless-subwoofer-manualRead 15 October 2026Copy of the UC000 user manual, specification section: Soundbar 600 x 70 x 90 mm as W x H x D. The maker page prints the same three numbers but labels 70 as depth and 90 as height. The manual order is used because it matches the product photos, where the bar is deeper than it is tall. The page could not be opened directly (HTTP 403), so the figures were read from a search excerpt of the page.

Width1,180Height85Depth143mm(46.5 × 3.3 × 5.6 in)3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Installed in front of a TV, including the feet. Wall mounted with brackets it is 1180 x 76 x 155 mm.

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

1,600g(3.5 lb)1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Size and Weight: Soundbar Weight 3.53 lbs (1.6 kg).

11,000g(24.3 lb)3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 202611 kg for the sound bar.

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.

AULTIMEA Poseidon M30

Component	Width (mm)	Height (mm)	Depth (mm)
Subwoofer	300	200	150

Source4Owner's manualmanuals.plus/ultimea/poseidon-m30-2-1-channel-soundbar-with-wireless-subwoofer-manualRead 15 October 2026Copy of the UC000 user manual: Subwoofer 300 x 200 x 150 mm as W x H x D. The maker page gives 150 (W) x 300 (D) x 200 (H) mm for the same box. Height agrees. The manual order is used. No subwoofer weight is published.

BYamaha True X Surround 90A

Component	Width (mm)	Height (mm)	Depth (mm)	Weight (g)
Subwoofer	241	378	414	12,700
Each rear speaker	88	220	88	990

Source3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Subwoofer 241 x 378 x 414 mm and 12.7 kg from the guide. The rear speaker row is from the WS-X3A guide.

Package dimensions

Width335Height437Depth197mm(13.2 × 17.2 × 7.8 in)1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Packaging Dimensions: 335 (W) x 437 (H) x 197 (D) mm. The manual gives the same figures as W x H x D.

Width1,282.7Height355.6Depth609.6mm(50.5 × 14 × 24 in)9Retailer pagetanotis.com/products/yamaha-true-x-surround-90a-5-1-2-channel-dolby-atmos-soundbar-system-with-wireless-surroundsRead 13 October 2026Box 50.5 x 24 x 14 in (L x W x H), converted exactly. Length is stored as width and the 24 in side as depth.

Package weightiShipping package including supplied components and packaging.

Not available

37,829.6g(83.4 lb)9Retailer pagetanotis.com/products/yamaha-true-x-surround-90a-5-1-2-channel-dolby-atmos-soundbar-system-with-wireless-surroundsRead 13 October 202683.4 lb converted exactly. Package weight for the SR-X90APKBL, bar, subwoofer and two rear speakers.

Wall mountable

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes wall brackets and a wall mounting kit. Overview: place it on a desk or mount it on the wall.

Yes1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026Overview page: remove the feet and wall mount with the included metal brackets.

In the box

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In the box

Soundbar, Wireless subwoofer, Power adapter, Subwoofer power cable, HDMI cable, Remote control, 2 wall brackets, 2 mounting screws, 4 wall mounting kits, User manual1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes: Power Adaptor, Subwoofer Power Cable, HDMI Cable, Remote Control, Wall Mounting Kit x4, Mounting Screw on Speakers x2, Wall Bracket x2, User Manual. The Amazon listing names the soundbar and the wireless subwoofer.

Sound bar (SR-CUX90A), Subwoofer (SR-WSWX90A), Two True X Speaker 3A wireless surround speakers (WS-X3A) with charging cradles and USB charging cables, Remote control, Two AAA batteries, Two power cords, Two mounting brackets, Two washers, Quick Guide, Safety Guide3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026Guide, items included, plus the WS-X3A included accessories and the press release for charging cradles.

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

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes: x2 Wall Bracket and x4 Wall Mounting Kit.

Yes3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026

HDMI cable included

Yes1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026Kit includes: x1 HDMI Cable.

No3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026The guide notes that an HDMI cable is not included.

Optical cable included

No1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The kit list names no optical cable.

No3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026No optical cable in the guide list of included items.

General

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Series

Poseidon1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026

True X1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026The maker lists the model in its True X range.

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

UC000, UC000US10-US2Maker product pageultimea.com/products/poseidon-m30-2-1-soundbar.jsonRead 15 October 2026Maker store variant SKU UC000US10-US. UC000 is the model number on the Amazon listing and in the user manual.3Retailer pageamazon.com/dp/B0GHRSHDT1Read 15 October 2026Item details: Model Number UC000, Model Name Poseidon M30, sold by the ULTIMEA Store.

SR-X90APKBL8Retailer pageabt.com/Yamaha-TRUE-X-SURROUND-90A-Dolby-Atmos-Sound-Bar-with-Wireless-Surrounds-SRX90APKBL/p/236683.htmlRead 13 October 2026US retailer model number for the black package. Component models are SR-X90A for the bar, SR-WSWX90A for the subwoofer and WS-X3A for the rears.

GTIN / EAN

8500563113802Maker product pageultimea.com/products/poseidon-m30-2-1-soundbar.jsonRead 15 October 2026Maker store variant barcode 850056311380 for the US variant.

0867923955318Retailer pageabt.com/Yamaha-TRUE-X-SURROUND-90A-Dolby-Atmos-Sound-Bar-with-Wireless-Surrounds-SRX90APKBL/p/236683.htmlRead 13 October 2026UPC 086792395531 for the package. A second retailer lists the same number.

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

Not available

6 August 20255Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026Maker US release dated August 6, 2025.

Status

Available1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026The US maker store lists the soundbar at $79.99 with an Add to Cart button.

Available1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026The model has a live page on the maker US site and is not marked discontinued.

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.

Not available

$3,499.955Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026$3,499.95 MSRP for the True X Surround 90A package with two surround speakers. The bar and subwoofer without rear speakers is a separate True X Bar 90A package.

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

Not available

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

US1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026US store page. The only variant is Shipping Region US.

US5Press releaseusa.yamaha.com/news_events/2025/yamaha-unveils-its-most-advanced-sound-bar.htmlRead 13 October 2026US release and US MSRP.

ColoursiThe maker's own colour names

Not available

Black1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026Maker US pages show one black finish. The US retailer Abt and Tom's Guide list Black.

Links

Not compared

Product page

www.ultimea.com/products/poseidon-m30-2-1-soundbar1Maker product pageultimea.com/products/poseidon-m30-2-1-soundbarRead 15 October 2026

usa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.html1Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/index.htmlRead 13 October 2026

Spec sheet

Not available

usa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.html2Maker product pageusa.yamaha.com/products/audio_visual/sound_bar/truexsurround90a/specs.htmlRead 13 October 2026Maker US spec page for the True X Surround 90A package.

Manual

support.ultimea.com/hc/en-us/articles/55656524216473-Poseidon-M30-User-Manual5Owner's manualsupport.ultimea.com/hc/en-us/articles/55656524216473-Poseidon-M30-User-ManualRead 15 October 2026Maker support article Poseidon M30 User Manual with the PDF downloads. The page returns a bot check to scripted requests, so it was not opened. The title and the link come from a search result.

usa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdf3Owner's manualusa.yamaha.com/files/download/other_assets/6/2369446/AV24-0002_SR-X90A_user_guide_En_UCABG_F0.pdfRead 13 October 2026

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

Not available

Not available

Warranty

1 of 1 differ

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

1year6Maker product pageultimea.com/pages/warranty-policyRead 15 October 2026Warranty Period by Region: United States and Canada 1 year. The EU is 2 years.

Not available

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