BUYING GUIDES / UNITED KINGDOM
Sonos Arc Ultra or Era 300: start with the room
A soundbar for television and a speaker for music solve different problems. Start with what you listen to and where it needs to work.
Living Select UK · 14 September 2026 · Based on published information, not hands-on testing.
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TV or music?
Arc Ultra is a home-cinema soundbar that connects to a television through HDMI eARC/ARC. Era 300 is a separate speaker suited to music and compatible Sonos configurations. Sonos provides setup and compatibility information for each. Do not assume that one Era 300 replaces a soundbar under your television. Arc Ultra details · Era 300 details.
| Decision | Arc Ultra | Era 300 |
|---|
| Starting point | Television and home cinema | Music listening and compatible room setups |
| Displayed quantity | One soundbar | One speaker |
| Costs to check | Optional subwoofer, rear speakers and mounting | A second speaker, stands and connection accessories if needed |
Avoid the quantity trap
A photograph of a finished room can suggest a whole system even when a price covers one component. The price below for Era 300 is for one speaker. If you want two, compare the retailer’s pair offer with two individual units. Likewise, an Arc Ultra price does not automatically include a subwoofer or rear speakers.
Plan the room before adding components
Measure the space under the screen and check that the soundbar will not obstruct it. For a separate speaker, consider where power is available and whether furniture blocks the proposed placement. Follow Sonos’s spacing and setup guidance for the final position. If you rent, include any mounting permissions in your decision.
Confirm the final order
Check your TV connection, supported music services and the exact configuration before purchasing. Then enter your postcode at the retailer for the available delivery date. If you order components from different sellers, their delivery dates and return processes may differ. Starting with the component that solves your main need makes it easier to judge whether an expansion is useful.
Compare the selected packages
Dated UK reference prices, not live Amazon prices. The retailer confirms the selected package, final total and delivery date for your postcode.
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Sonos · Audio & television
Arc Ultra
£999
UK reference price · 14 Sep 2026Soundbar only- Quantity / package
- 1 soundbar; subwoofer and rear speakers separate
- UK delivery
- Enter your postcode at the retailer to see the delivery date and cost.
A premium soundbar for shoppers building a Sonos-based home cinema around their main television.
Before you buy
Check the TV’s HDMI eARC support and the space below the screen. A subwoofer or rear speakers are separate purchases.
Manufacturer information ↗UK reference price source ↗ Shop Now ↗Affiliate link · Amazon UK · Check final price 19 / 67
Sonos · Audio & television
Era 300
£499
UK reference price · 14 Sep 2026One speaker- Quantity / package
- 1 speaker; a stereo pair requires 2
- UK delivery
- Enter your postcode at the retailer to see the delivery date and cost.
A distinctive wireless speaker for a music-focused room or a compatible Sonos home-cinema system.
Before you buy
Placement affects the experience. Check service support, connection requirements and whether your intended setup needs a pair.
Manufacturer information ↗UK reference price source ↗ Shop Now ↗Affiliate link · Amazon UK · Check final price Read the price, package and delivery checklist →