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Sonos Arc Ultra vs LG S90TY 5.1.3 Soundbar

The Sonos Arc Ultra is the stronger soundbar: a 9.1.4 array with 14 drivers, Sound Motion bass, and clear dialogue, and owners and reviewers rate its room-filling Atmos effect highly. The LG S90TY is a 5.1.3 system with a wireless subwoofer included, DTS:X support, and tight integration with LG TVs. Pick the Sonos for the best standalone sound and multiroom flexibility; pick the LG if you own an LG OLED and want a subwoofer in the box.

  • Choose the Sonos Arc Ultra if you want the most immersive single-bar Atmos sound, the clearest dialogue, and Sonos multiroom and voice control.
  • Choose the LG S90TY if you own an LG OLED TV and want a bundled wireless subwoofer, DTS:X, and WOW Orchestra and WOWCAST integration.

Prices

  • Sonos Arc Ultra: $859.99 at eBay (last seen Nov 9)
  • LG S90TY 5.1.3 Soundbar: $449.99 at eBay (last seen Nov 6)
  • Difference: the LG S90TY 5.1.3 Soundbar is $410.00 cheaper than the Sonos Arc Ultra at the latest prices (Nov 6 and Nov 9)
Sonos
Sonos Arc Ultra

Sonos Arc Ultra

5(2 ratings)
$859.99at eBayChecked 20 h ago
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Pros
  • 9.1.4 array with 14 drivers fills the room with precise Atmos placement
  • Sound Motion delivers deep bass from a slim bar
  • Speech Enhancement and a strong center channel keep dialogue clear
  • Sonos multiroom, Trueplay tuning, and voice control
  • Sleek curved metal design with touch controls
Cons
  • No subwoofer included; a Sonos Sub is a separate add-on
  • No DTS:X support
  • Large and heavy for a soundbar
  • Best surround effect needs optional rear speakers
LG
LG S90TY 5.1.3 Channel Soundbar with Dolby Atmos

LG S90TY 5.1.3 Soundbar

LG S90TY 5.1.3 Channel Soundbar with Dolby Atmos

4.2(256 ratings)
$449.99at eBayChecked Nov 6
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • Wireless subwoofer included for real low-end
  • Dolby Atmos and DTS:X support
  • WOW Orchestra and WOWCAST work well with LG OLED TVs
  • Triple up-firing channels, including an up-firing center
  • AI room calibration and HDMI pass-through
Cons
  • 5.1.3 layout is less enveloping than a 9.1.4 array
  • No multiroom audio
  • Bluetooth uses only the SBC codec
  • TV integration features are limited outside LG TVs

What separates them

Sonos Arc UltraLG S90TY 5.1.3 Soundbar
Channel configuration9.1.4 with 14 drivers, including up-firing drivers5.1.3 with 11 speakers, including triple up-firing channels
SubwooferNot included; add a Sonos Sub separatelyWireless subwoofer included in the box
Surround formatsDolby Atmos; no DTS:XDolby Atmos and DTS:X
Room calibrationAutomatic Trueplay tuning in the Sonos appAI room calibration with a built-in microphone
TV integrationWorks with any TV over HDMI eARC; no TV-brand tie-inWOW Orchestra and WOWCAST with LG TVs
Ecosystem and multiroomSonos multiroom, Sonos Voice Control, Alexa, BluetoothChromecast for Audio, Alexa, Bluetooth; no multiroom
Build and designCurved metal body, matte finish, wall-mountable, touch controlsBlack bar with remote and app control
SetupSingle HDMI eARC cable, guided in the Sonos appHDMI eARC or optical, plus wireless subwoofer pairing

Price history

$1,099.00$449.99
Oct 28Nov 10
  • Sonos Arc Ultra: lowest $989.10 on Nov 3 at eBay; $1,099.00 on Nov 10.
  • LG S90TY 5.1.3 Soundbar: lowest $449.99 on Nov 5 at eBay; $699.99 on Nov 10.

Prices at every store

Sonos Arc Ultra

  • Abt ElectronicsNew

    In stock

    $1,099.00Free shippingChecked 1 h ago
    Visit Abt Electronics
  • SonosNew

    In stock

    $1,099.00Free shippingChecked 1 h ago
    Visit Sonos
  • WalmartNew

    In stockSold by World Wide Stereo (Authorized)Returns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $1,099.00Checked 5 h ago
    Visit Walmart
  • eBayNew

    Availability unknownSold by tradenest-1 (98.6% positive, 134 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $859.99+ $25.00 shippingChecked 20 h ago
    Visit eBay

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay
  • BrandsMart USACheck price at BrandsMart USA

Store links may earn us a commission. Some prices via Klarna.

All 32 stores and price history →

LG S90TY 5.1.3 Soundbar

  • Best BuyNew

    In stock

    $699.99Checked 1 h ago
    Visit Best Buy
  • LGNew

    In stock

    $699.99Checked 6 h ago
    Visit LG
  • eBayNew

    Availability unknown

    $449.99Checked Nov 6
    Visit eBay
  • inpexopcion.comNew

    Availability unknown

    $695.00Checked Nov 6
    Visit inpexopcion.com

Also available at

  • eBayCheck price at eBay

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All 6 stores and price history →

Specs compared

SpecSonos Arc UltraLG S90TY 5.1.3 Soundbar
OutdoorNoNo
Frequency ResponseDoesn't provide a full frequency range96 KHz
BluetoothYesYes
Connectivity TechnologyWireless, Bluetooth, Wi-FiWi-Fi, Bluetooth, Wireless
Ports And InterfacesHDMI eARC, Ethernet port, HDMI eARC portHDMI, USB, Optical input
Wi-FiYesYes
Assistant SupportAmazon Alexa, Sonos Voice ControlAmazon Alexa
Smart FunctionsVoice controlChromecast, Spotify Connect
Speaker PlacementWall MountableWall-mountable
Audio Configuration9.1.4 system5.1.3-channel system
Audio HighlightsDolby Atmos EnabledDolby Atmos Enabled, High-resolution audio supp…
Audio Channels9.1.4-channel5.1.3 channel
Show all 40 specsShow fewer specs
SpecSonos Arc UltraLG S90TY 5.1.3 Soundbar
Design HighlightsWall Mountable, Touch controlsWall mountable
MaterialMetalplastic
Driver SizeMultiple sizes of mid-range drivers and tweeters8" (Front Subwoofer Unit)
Driver ConfigurationUp-FiringTriple up-firing speakers
Driver TypeTweeters, MidwoofersUp-firing speakers
Number Of DriversSeven tweeters, Six midwoofersTriple Up-firing speakers
Nominal Output PowerFifteen amps570 W
Max Wattage150 W (Peak audio power handling)570 Watt (total)
Wireless

What reviewers say

Sonos Arc Ultra

Reviewers describe clear, detailed sound with convincing bass and immersive Atmos effects, and several praise the smoother app setup. Some owners who moved up from the original Arc were not blown away by the difference.

What people mention
  • Sound qualityPraisedReviewers call it clear and detailed across music and film soundtracks.
  • BassPraisedThe Sound Motion woofer is said to give real punch without adding a Sub.
  • Atmos effectsPraisedOwners describe height and surround effects that fill the room from one bar.
  • DialoguePraisedSpeech comes through clearly, and Speech Enhancement in the app helps further.

LG S90TY 5.1.3 Soundbar

  • 4.2 / 5256 ratings

Buyers rate the S90TY 4.2 out of 5 across 256 ratings and most praise its sound quality. Setup and the low-profile design also come up often, and few complaints are reported.

What people mention
  • Sound qualityPraisedBuyers call the sound exceptional and the most frequently praised part of the bar.
  • SetupPraisedOwners describe installation as straightforward.
  • DesignPraisedThe sleek, low-profile bar is said to blend well with home decor.
Reviews
  • The Best Soundbars for 2026
  • Best Soundbars 2026: Options to suit your home cinema needs
  • We tested four premium Dolby Atmos soundbars: can JBL, LG or Sony defeat Sonos?
  • The Best Soundbars for 2026 - PCMag editors select and review products independently
  • What Hi-Fi? Awards 2026: we tested more than 20 soundbars to find these 7 Dolby Atmos winners

Questions and answers

Which is better for Dolby Atmos movies?
The Sonos Arc Ultra. Its 9.1.4 array with 14 drivers and up-firing drivers places effects more precisely around and above you. The LG S90TY is capable, but its 5.1.3 layout is less enveloping.
Do I need a subwoofer with the Sonos Arc Ultra?
Not strictly. Sound Motion gives the Arc Ultra deeper bass than earlier Sonos bars. The LG S90TY ships with a wireless subwoofer, so it delivers more low-end out of the box.
Which is better for an LG OLED TV?
The LG S90TY. WOW Orchestra plays the TV and soundbar speakers together, and WOWCAST connects wirelessly to LG TVs. The Sonos Arc Ultra works with any TV over HDMI eARC but has no LG-specific features.
Which lasts longer?
Both are built to last, and neither has a documented failure pattern. The Sonos has a metal body and a longer software support history through the Sonos app; the LG relies on LG's firmware updates.
Is the Sonos Arc Ultra worth stepping up to?
Yes if you want the best standalone Atmos sound, clearer dialogue, and Sonos multiroom. Skip it if you want a subwoofer included or need DTS:X, where the LG is the better fit.
Does the LG S90TY support DTS:X?
Yes. The LG S90TY decodes DTS:X as well as Dolby Atmos, Dolby TrueHD, and Dolby Digital Plus. The Sonos Arc Ultra does not support DTS:X.

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Yes
Yes
ColorWhiteBlack
Special PurposeSoundbarCenter Channel
Dolby Atmos EnabledYesYes
ConnectivityBluetooth, Wi-Fi, HDMI, Ethernet, Optical AudioBluetooth, Wi-Fi, HDMI
Crossover Frequency70 Hz (for Arc Ultra and Sub)—
Power SourcePlug in the power cable—
StyleMatte finish—
Output Level (SPL)Volume hovering around 30 (out of 50)—
Width46.4 in wide—
Channels9.1.4—
WiFi✅—
Physical ConnectionsHDMI eARC, Ethernet—
Voice Assistant✅ Sonos Voice Control and Alexa—
Subwoofer Output❌ (Wireless connection to Sonos sub)—
HDMI Inputs0—
Auto Room Calibration✅ Trueplay, plus QuickTune on Android—
Dialogue Enhance Mode✅ Adjustable Speech Enhancement—
Configuration—5.1 Channel
With Surround Sound—Yes
ConnectivityPraised
Buyers report seamless pairing with their televisions.
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