KEF
KEF LSX II
Smart/Portable · $1399
92
/ 100
From $1,399
VS
KEF LSX II wins by 4
Sonos
Sonos Era 300
Dolby Atmos · Wi-Fi 6 · Spatial audio
88
/ 100
From $449
Specdex verdict
KEF LSX II takes it — here’s why.
In our weighted Specdex score, KEF LSX II lands at 92 and Sonos Era 300 at 88. That puts KEF LSX II ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.
Pick KEF LSX II if…
- ✓Easy multi-room with ecosystem
- ✓App EQ on modern models
- ✓USB-C/AUX input on some
Pick Sonos Era 300 if…
- ✓Genuine Atmos from one box
- ✓Sonos ecosystem polish
- ✓USB-C line-in
KEF LSX II 92
vs 88 Sonos Era 300
Score breakdown
KEF LSX II
92 sound 92
features 90
design 88
ecosystem 84
Sonos Era 300
88 sound 90
features 88
design 92
ecosystem 86
Specs side-by-side
| Spec | KEF LSX II | Sonos Era 300 |
|---|---|---|
| Drivers | — | 6 (4 tweeters, 2 woofers) |
| Connectivity | — | Wi-Fi 6, BT 5.0, USB-C |
| Voice | — | Amazon Alexa |
| Power | — | Class-D amps |
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
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
FAQ: KEF LSX II vs Sonos Era 300
Which is better, KEF LSX II or Sonos Era 300? +
KEF LSX II scores 92 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.
Is KEF LSX II worth the price? +
At $1,399, KEF LSX II delivers a Specdex score of 92 — strongest in sound.
Is Sonos Era 300 worth the price? +
At $449, Sonos Era 300 delivers a Specdex score of 88 — strongest in design.
Does KEF LSX II or Sonos Era 300 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.