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Sonos Era 300 — Dolby Atmos · Wi-Fi 6 · Spatial audio
Sonos

Sonos Era 300

Dolby Atmos · Wi-Fi 6 · Spatial audio

88
/ 100
From $449
VS
KEF LSX II wins by 4
KEF LSX II — Smart/Portable · $1399
KEF

KEF LSX II

Smart/Portable · $1399

92
/ 100
From $1,399
Specdex verdict

KEF LSX II takes it — here’s why.

In our weighted Specdex score, Sonos Era 300 lands at 88 and KEF LSX II at 92. That puts KEF LSX II ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Sonos Era 300 if…

  • Genuine Atmos from one box
  • Sonos ecosystem polish
  • USB-C line-in

Pick KEF LSX II if…

  • Easy multi-room with ecosystem
  • App EQ on modern models
  • USB-C/AUX input on some
Sonos Era 300 88
vs
92 KEF LSX II

Score breakdown

Sonos Era 300
88
sound 90
features 88
design 92
ecosystem 86
KEF LSX II
92
sound 92
features 90
design 88
ecosystem 84

Specs side-by-side

Sonos Era 300 versus KEF LSX II — full spec comparison
Spec Sonos Era 300 KEF LSX II
Drivers
6 (4 tweeters, 2 woofers)
Connectivity
Wi-Fi 6, BT 5.0, USB-C
Voice
Amazon Alexa
Power
Class-D amps

Sonos Era 300

Pros
  • +Genuine Atmos from one box
  • +Sonos ecosystem polish
  • +USB-C line-in
Cons
  • Sonos app issues persist
  • Needs Atmos-mastered tracks
  • Bass limits vs larger rivals

KEF LSX II

Pros
  • +Easy multi-room with ecosystem
  • +App EQ on modern models
  • +USB-C/AUX input on some
Cons
  • Brand ecosystem lock-in
  • Subscription features on some
  • Bass limits at lower sizes

FAQ: Sonos Era 300 vs KEF LSX II

Which is better, Sonos Era 300 or KEF LSX II? +

KEF LSX II scores 92 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.

Is Sonos Era 300 worth the price? +

At $449, Sonos Era 300 delivers a Specdex score of 88 — strongest in design.

Is KEF LSX II worth the price? +

At $1,399, KEF LSX II delivers a Specdex score of 92 — strongest in sound.

Does Sonos Era 300 or KEF LSX II last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.