Premium Dolby Atmos soundbars have become the gateway to immersive home cinema, and four contenders just went head-to-head in a rigorous test by What Hi-Fi? reviewers. The Sonos Arc Ultra, Sony Bravia Theatre Bar 9, LG S95TR, and Samsung HW-Q990D each claim to deliver cinematic soundscapes, but only one emerges as the clear winner.
Key Takeaways
- Sonos Arc Ultra beats three rivals on Dolby Atmos height effects, bass precision, and overall cinematic immersion.
- Sony Bravia Theatre Bar 9 is a strong contender but loses ground in Atmos accuracy and bass control versus the Arc Ultra.
- LG S95TR impresses with design and power but suffers from muddier bass and less precise imaging than competitors.
- Samsung HW-Q990D offers the most channels (11.1.4) and scale but delivers overly aggressive dynamics that can fatigue listeners.
- Sonos Arc Ultra includes Sound Motion technology, allowing bass adjustment via phone motion-sensing—a feature unique among the four.
Sonos Arc Ultra Wins the Atmos Crown
The Sonos Arc Ultra is a fairly comfortable winner over solo soundbar rivals in this test, according to What Hi-Fi? reviewers with 17+ years of AV experience. Its brilliant reproduction of Dolby Atmos soundtracks and superbly tight, tuneful bass set it apart from competitors that either struggle with height channel precision or muddy the low end. When testing premium Dolby Atmos soundbars across scenes from Dune and Top Gun Maverick, the Arc Ultra delivered overhead effects that felt genuinely immersive rather than merely ambient. The soundbar’s ability to maintain clarity during dense action sequences—where dialogue, effects, and music collide—proved decisive.
The Arc Ultra’s Sound Motion technology adds a layer of customization absent from rivals. This motion-sensing feature allows users to adjust bass response via their phone, offering a degree of personalization that neither the Sony, LG, nor Samsung systems match. At £999 / $999, it undercuts the Sony Bravia Theatre Bar 9 (which costs £1999 for the bar alone) while delivering superior Atmos performance. This pricing advantage, combined with its technical prowess, makes the Arc Ultra the standout choice for viewers prioritizing cinematic immersion.
Sony Bravia Theatre Bar 9 Falls Short Despite Premium Pricing
The Sony Bravia Theatre Bar 9 is superb, but the Arc Ultra edges it in the areas that matter most for Dolby Atmos reproduction. Sony’s flagship soundbar relies on Acoustic Center Sync technology to distribute sound across its channels, yet this approach does not match Sonos’s precision in rendering height effects. During overhead pans and ambient Atmos elements, the Sony system felt less focused than the Arc Ultra, with height channels blending into the main soundstage rather than creating discrete spatial layers.
Bass control also favors the Sonos. The Sony Bravia Theatre Bar 9 produces powerful low-end output, especially when paired with the optional SA-SW5 subwoofer (adding £899 to the total cost), but lacks the tightness and articulation of the Arc Ultra’s bass reproduction. For a soundbar system that costs £2898 with the sub—nearly three times the Arc Ultra’s price—this shortfall is significant. The Sony remains a strong rival for users heavily invested in the Bravia TV ecosystem, but on pure audio merit, it does not justify its premium positioning among premium Dolby Atmos soundbars.
LG S95TR Prioritizes Power Over Precision
LG’s system looks the part and sounds powerful, but lacks the finesse needed to compete with the Arc Ultra and Sony. The LG S95TR excels in raw scale and output, delivering impressive volume levels that suit large rooms. However, this power comes at a cost: the system’s bass response is muddier than rivals, and its imaging—the ability to pinpoint sounds in three-dimensional space—is less precise. When testing premium Dolby Atmos soundbars, precision matters as much as power. A soundbar that renders a helicopter’s flight path as a vague blur rather than a sharp trajectory undermines the entire Atmos experience.
At £1299 with its wireless subwoofer included, the LG S95TR offers reasonable value compared to the Sony. Yet the Arc Ultra still provides better overall performance at a lower price point. The LG system appeals primarily to buyers who prioritize design aesthetics and raw output over refined sound staging, making it a secondary choice for serious home cinema enthusiasts.
Samsung HW-Q990D: Maximum Channels, Minimal Refinement
The Samsung HW-Q990D is the most ambitious of the four, boasting an 11.1.4-channel configuration with wireless rears and subwoofer included. This architecture suggests maximum immersion, yet the system’s overly aggressive dynamics work against it. During testing, the Samsung delivered bombastic, fatiguing sound that prioritized impact over nuance. Subtle Atmos elements—the rustle of fabric, the whisper of wind—got lost in the system’s relentless pursuit of scale.
At £1799 / $1500 for the full system, the Samsung HW-Q990D costs more than the Arc Ultra and delivers less refinement. Its 11.1.4 channel count does provide genuine advantages for larger rooms where discrete surround and height channels can breathe. However, for the majority of living rooms, the Arc Ultra’s more balanced approach to Dolby Atmos soundbars delivers a more enjoyable listening experience. The Samsung excels in raw channel count but stumbles in the execution that transforms specs into actual cinematic magic.
What Makes Premium Dolby Atmos Soundbars Worth the Investment
All four systems support Dolby Atmos and DTS:X, meaning they can decode immersive soundtracks from streaming services, Blu-ray discs, and gaming consoles. The difference lies in how faithfully they reproduce those soundtracks. Dolby Atmos relies on precise height channel placement and tight bass control to create the illusion of objects moving through three-dimensional space. A soundbar that muddles either element fails at its core purpose, regardless of channel count or output power.
The Arc Ultra’s victory across premium Dolby Atmos soundbars reflects What Hi-Fi?’s testing of more than 20 soundbars in their 2025 Awards cycle. This wasn’t a narrow win—it was a decisive performance gap that emerged consistently across multiple test films and music tracks. For buyers ready to invest in a premium soundbar system, the Arc Ultra offers the best balance of performance, price, and expandability. Sonos’s ecosystem of compatible speakers (Era 300 rears, Sub Gen 3) means the system can grow without forcing a complete replacement down the line.
Should you buy the Sonos Arc Ultra over rivals?
Yes, if you prioritize Dolby Atmos immersion and bass precision. The Arc Ultra outperforms the Sony Bravia Theatre Bar 9, LG S95TR, and Samsung HW-Q990D in the technical areas that define cinematic sound. Its price advantage over the Sony and LG systems makes the decision even clearer. The only reason to choose another system is if you need maximum channel count (Samsung) or deep integration with a specific TV brand (Sony Bravia models).
Can the Samsung HW-Q990D’s 11.1.4 channels justify its cost?
Only in large rooms where discrete surround and height channels have space to operate independently. For typical living rooms, the Arc Ultra’s more refined approach delivers better results at lower cost. The Samsung’s aggressive dynamics also tire listeners over extended viewing sessions, making it less suitable for daily use despite its impressive specifications.
What makes Sonos Arc Ultra’s Sound Motion feature valuable?
Sound Motion allows users to adjust bass response via phone motion-sensing, offering personalization that competitors do not provide. This is particularly useful for fine-tuning the system to your room’s acoustics without purchasing multiple subwoofer options or paying for professional calibration.
The Sonos Arc Ultra’s victory in this head-to-head test of premium Dolby Atmos soundbars is not a fluke—it reflects superior engineering in the areas that matter most: height channel precision, bass control, and overall tonal balance. For buyers ready to upgrade their home cinema sound, the Arc Ultra offers the best combination of performance, price, and future expandability. The Sony Bravia Theatre Bar 9 remains a solid choice for Bravia TV owners, but it cannot justify its premium pricing against the Arc Ultra’s superior Atmos reproduction. The LG and Samsung systems have their strengths, yet neither offers the refinement that transforms a soundbar from a nice-to-have into a genuine cinematic upgrade.
Where to Buy
£899.99 | 2 Amazon customer reviews | £999
Edited by the All Things Geek team.
Source: What Hi-Fi?
