There was always something quietly impressive about the Sonos Arc Ultra. Even before the latest software updates, it delivered an expansive, room-filling Dolby Atmos experience from a single, discreet soundbar. What has changed is not how it looks, or even fundamentally how it sounds, but how finished the entire system now feels.

This is no longer just a very good soundbar. It is the centre of a genuinely flexible home cinema and personal listening system.

Design and presence

Arc Ultra remains a masterclass in restraint. Its slim, curved profile and matte finish allow it to sit beneath large televisions without shouting for attention. It does not block bezels, it does not dominate the room, and it blends in far better than most high-end audio hardware.

That calm design language continues into daily use. There are no flashing lights, no distracting displays, and no sense that you are living with a piece of “tech” rather than a home product.

Sound quality: wide, controlled, and confident

On its own, Arc Ultra delivers a convincing 9.1.4 Dolby Atmos presentation. Sound does not simply fire forwards; it spreads across the room, with effects placed to the sides and above in a way that feels natural rather than exaggerated.

Dialogue is consistently clear, helped by Sonos’ enhanced Speech Enhancement options. Voices cut through dense mixes without sounding artificially boosted, and the balance of music and effects remains intact. It is one of those features you quickly stop thinking about because it just works.

Bass performance from the soundbar alone is impressive thanks to Sonos’ Sound Motion™ woofer, but pairing Arc Ultra with the Sub 4 (£799) transforms the experience. Low frequencies gain genuine physical presence. Explosions hit harder, music gains weight, and the overall soundstage feels more grounded. Importantly, the Sub integrates seamlessly. It never draws attention to itself.

Sonos Ace: the update that changes everything

At £399, Sonos Ace headphones were already strong, but the recent major software update fundamentally changes their role in the system.

TrueCinema is the standout. Instead of collapsing sound into your head, it recreates the acoustic character of your room inside the headphones. Watching a film feels like you are still sitting in front of the TV, just privately. It is not a gimmick. It is genuinely convincing.

The updated TV Audio Swap for two is equally important. Two people can now listen to the same TV audio simultaneously on their own Ace headphones, perfectly in sync. Late-night viewing, shared spaces, or simply different listening preferences suddenly become non-issues.

Noise cancellation has also been refined, adapting in real time to glasses, hair, or hats, while call quality feels more natural thanks to improved voice handling and SideTone.

Why software matters here

This is where Sonos quietly pulls away from many rivals.

None of these improvements required new hardware. Arc Ultra, Sub 4, and Ace simply became better through software. Features that would normally justify a new product launch arrived overnight, free of charge.

This matters because it changes the value equation. You are not just buying hardware as it exists today. You are buying into a platform designed to evolve.

In a market obsessed with fast churn, this feels refreshingly grown-up.

Short verdict

The Sonos Arc Ultra system now feels complete.
With Sub 4 adding authority and Ace headphones transformed by TrueCinema and dual-listener TV Audio Swap, this is no longer just a soundbar setup. It is a flexible, future-proof home audio system that adapts to how people actually live.

Sonos Arc Ultra (with Sub 4 and Ace)
9.5 / 10

Pros

• Exceptional Dolby Atmos performance from a single bar
• Seamless integration with Sub 4
• TrueCinema on Ace is genuinely transformative
• Dual-listener TV audio is brilliantly practical
• Software updates meaningfully improve value over time

Cons

• Premium pricing
• Full experience requires buying into the ecosystem

Final thoughts

At £999 for Arc Ultra, this is premium territory. Add the Sub 4 and Ace and the investment grows. But unlike many premium systems, this one earns its place over time.

This is not about excess or spec-sheet bravado. It is about refinement, flexibility, and sound that adapts to real life.

Sonos has not reinvented home audio here.
It has quietly perfected it!