What does the Era 300 actually sound like?
It sounds bigger than its size suggests, with a wide stage and clear separation between instruments when the track is mixed in Atmos. Reviewers such as What Hi-Fi and TechRadar single out the immersive, tall presentation as the reason to buy it, and say the bass is deep and clean for a speaker this compact.
The design is the reason. Four tweeters fire forwards, sideways and upwards, while two angled woofers handle stereo bass. That layout is what lets the speaker bounce sound off walls and ceiling to imply height, which no ordinary stereo speaker can do. Place it a little way out from the wall and run Trueplay tuning so it can adapt to the room.
One honest limit: it will not turn stereo tracks into 3D audio. Standard stereo music sounds good, but the headline effect only appears with tracks mixed in Atmos, and it is best in a medium-sized room where the ceiling is close enough to reflect sound.
Which streaming services play Dolby Atmos on the Era 300?
Only Apple Music and Amazon Music Unlimited stream spatial audio to the Era 300 today. Spotify still has no spatial audio, and although Tidal offers it elsewhere, Sonos cannot play it. If your library lives on Spotify, you will be paying for Atmos hardware you rarely use.
Apple Music support arrived on Sonos speakers in March 2023, shortly after the Era 300 launched. Check that your subscription tier includes Atmos before you commit, and treat the Atmos catalogue as a bonus rather than the whole library.
How does the Era 300 fit into a home cinema?
It works well as a pair of rear surrounds for a Sonos soundbar such as the Sonos Arc or Beam (Gen 2), adding upward-firing height channels to the room. The trade-off is that Bluetooth and line-in are disabled while the speakers are bonded as surrounds, so a turntable would need a separate speaker.
As a stereo pair for music, two Era 300s deliver a noticeably wider soundstage, but that is a £900 outlay at RRP. Compare the wider field in our best multiroom speakers UK guide before you commit.
Does the Sonos Era 300 work with Home Assistant?
Yes. The Era 300 works through Home Assistant's built-in Sonos integration, which runs locally over UPnP rather than through a cloud account. You must enable UPnP in the Sonos app (Account, then Privacy and Security) for it to work.
Once added, the speaker appears as a media_player entity with play, pause, volume, source and grouping controls, plus entities for bass, treble, loudness and alarms. Port 1400 (TCP) must be reachable so Home Assistant can receive push updates; if it is blocked, the integration falls back to slower polling. Announcements and text-to-speech use port 1443. Music services such as Spotify or Apple Music are still signed in through the Sonos app, but you can then control playback from automations. For wider setup, see our Home Assistant media player guide.
How does it compare with the Era 100 and Sonos Five?
The Era 100 is the compact stereo speaker at a much lower price and has no Atmos. The Sonos Five is the pick if you want the most powerful stereo sound and an Ethernet port, but it has no spatial audio. The Era 300 sits between them: less raw power than the Five, but the only one with height channels.
Who should buy the Sonos Era 300?
Buy it if you have an Apple Music or Amazon Music subscription, a medium-sized room, and want one speaker that sounds three-dimensional. It is also a strong choice if you plan to add rear surrounds to a Sonos soundbar later. Skip it if you are a Spotify listener, want Google Assistant, or listen mostly in a tiny or low-ceilinged space.
Vinyl fans: the USB-C line-in only works with the Sonos Line-In Adapter and a turntable that has a built-in preamp (or a separate phono preamp). Our best turntable for Sonos guide covers compatible decks and wiring for a Sonos turntable setup with the Era 300.
Verdict
The Era 300 is the best-sounding smart speaker Sonos sells for people who care about immersive audio, and its local Home Assistant integration is a bonus for automation fans. Its one big caveat is that it depends on Atmos tracks from Apple Music or Amazon Music. If that fits how you listen, it is worth the money, especially when discounted below the £449 RRP.
