Sonos Arc Ultra vs Samsung HW-Q990D (2026)

The Samsung HW-Q990F Q-Series Soundbar earns our top composite, 9.0, predominantly through value. It replicates the 2024 HW-Q990D's 11.1.4 architecture yet undercuts its price, producing the lowest cost per channel here. What Hi-Fi named it the Dolby Atmos soundbar to beat in 2025, crediting substantial bass from a redesigned compact dual force-cancelling subwoofer that is smaller than the D's 8 in unit. TechRadar deemed it phenomenal, solidifying Samsung atop the soundbar food chain.

Its 23-driver configuration bundles wireless rears and the subwoofer, delivering discrete surround immediately rather than beamformed approximations. That outnumbers the Arc Ultra's 14 drivers by roughly 1.6x. RTINGS published a dedicated review anchoring the Arc Ultra head-to-head. Connectivity surpasses the D, incorporating Spotify and TIDAL Connect, Chromecast, AirPlay, Bluetooth, Q-Symphony, plus Eclipsa Audio. HDMI 2.1 passthrough and Game Mode Pro route a PS5 or Xbox Series X directly.

Versus the Sonos Arc Ultra Soundbar, this Samsung configuration delivers more discrete channels and console passthrough at a lower price, though its 7.5 calibration trails Sonos's 9.0 Trueplay implementation. It dominates cinematic immersion; the Arc Ultra retains the musical advantage.

The Samsung HW-Q990D earns a composite of 8.3, propelled by perfect channel-architecture and HDMI-integration marks. RTINGS documented the 2024 flagship as an 11.1.4-channel system whose 22 speakers and standout HDMI 2.1 support anchor its reputation. That configuration produces a concrete home-theater outcome: discrete wireless rears and an 8 in subwoofer arrive bundled, yielding genuine surround rather than beamformed effects. Its 22 drivers outnumber the Arc Ultra's 14 by roughly 1.6x.

The gaming proposition proves decisive. TechRadar called it the best Dolby Atmos soundbar, now perfect for PS5 and Xbox Series X, because its 2x HDMI 2.1 inputs passthrough 4K/120 directly with Game Mode Pro engaged. Trusted Reviews characterized the experience as full 11.1.4 immersion, uncompromised. SpaceFit Sound Pro manages automatic calibration, supporting Dolby Atmos plus DTS:X with Alexa integrated.

Versus the Samsung HW-Q990F Q-Series Soundbar, the D replicates the discrete 11.1.4 spine yet commands a higher cost per channel with narrower connectivity, explaining its 8.3 against the F's 9.0. Versus the Sonos Arc Ultra Soundbar, it delivers fuller discrete surround and passthrough, relinquishing Sonos's music and calibration advantages.

The Sonos Arc Ultra Soundbar earns a composite of 7.8, leading the two factors Sonos owns: streaming breadth and room calibration, where it scores a 10.0 and a 9.0 respectively. RTINGS named it the best one-box Dolby Atmos soundbar for the price. What Hi-Fi made it an Awards 2025 winner, citing significantly more controlled, tuneful bass and a huge upgrade on the original Arc from the new Sound Motion woofer. Its 14 drivers and 15 Class-D amps produce the cleanest single-cabinet imaging here.

The trade-off is architectural. This 9.1.4 cabinet generates beamformed surrounds, not discrete rears, and TechRadar flagged the absent HDMI passthrough as one grating flaw amid increasingly premium HDMI provisioning. Trueplay calibration, spanning Android and iOS, walks the room acoustically and represents the most sophisticated tuning here, scoring 9.0. The full Sonos platform incorporates AirPlay 2 and a first-ever Bluetooth implementation.

Versus the Samsung HW-Q990D, the Arc Ultra concedes discrete channels and passthrough but dominates music, calibration, and ecosystem integration. Replicating Samsung's surround through Sonos requires a Sub 4 plus 2x Era 300 surrounds, escalating the stack to roughly $2,416 — over 2x the Samsung kit's all-in price.

The Sonos Sub 4 Wireless Subwoofer is not a system, scoring as the component it represents — a 4.3 composite reflecting deliberately low channel and HDMI marks. No registered expert outlet reviewed the Sub 4 within this coverage set, so we characterize it exclusively from Sonos specifications. It deploys dual force-cancelling woofers, bonding wirelessly to the Arc Ultra through the Sonos application, eliminating any subwoofer cabling.

Its inclusion clarifies the full-Sonos arithmetic honestly. The Arc Ultra is a singular cabinet; replicating the discrete low end a Samsung kit bundles requires this Sub 4 plus 2x Era 300 surrounds. Independently the Sub 4 generates zero channels and carries no HDMI, depressing its system-oriented factors. Trueplay tuning activates once bonded, balancing low-frequency response acoustically. At $759.00, it pushes the Sonos stack past 2x the Samsung price.

Versus the Sonos Arc Ultra Soundbar it completes, the Sub 4 constitutes an upgrade pathway, not an alternative. Interpret its 4.3 as intentional component placement against complete systems, never a competitive ranking against the Samsung four-piece configurations.

The $379.00 Sonos Era 300 (Black, Pack of 2) is not a soundbar, and like the Sub 4 it is scored as the expansion component it is — a 5.2 composite. There is no registered expert-outlet review of the Era 300 in this guide's coverage set, so we describe it from Sonos manufacturer specifications only. A single Era 300 is a Dolby Atmos smart speaker, and a pair of them bonds to the Arc Ultra as wireless rear surrounds through the Sonos app, the piece that turns the one-box bar into a discrete-surround system.

Its streaming breadth is high because it carries the full Sonos platform plus AirPlay 2, Bluetooth, and Alexa, which is why that factor lifts its component score above the Sub 4. Trueplay tuning balances it to the room whether it is acting as a surround or a standalone speaker. It has no HDMI and produces no soundbar channels of its own, so its system-oriented factors sit low by design.

Compared to the Sonos Arc Ultra Soundbar it expands, the Era 300 is an upgrade path. Forming a surround pair means buying two, about $758, which is the math that pushes a full Sonos system well past the all-in price of the Samsung four-piece kits.