KEF LSX II · Black
Smart/Portable · $1399
Sonos Era 300
Dolby Atmos · Wi-Fi 6 · Spatial audio
KEF LSX II · Black takes it — here’s why.
In our weighted Specdex score, KEF LSX II · Black lands at 92 and Sonos Era 300 at 88. That puts KEF LSX II · Black ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.
Pick KEF LSX II · Black 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
Winner by scenario
Derived from the sub-score breakdown · not a separate testSound
KEF LSX II · BlackCompared on the sound sub-score
KEF LSX II · Black leads on sound (92 vs 90).
Design
Sonos Era 300Compared on the design sub-score
Sonos Era 300 leads on design (92 vs 88).
Features
KEF LSX II · BlackCompared on the features sub-score
KEF LSX II · Black leads on features (90 vs 88).
Value for money
Sonos Era 300Specdex score per dollar at MSRP
Sonos Era 300 more score per dollar ($449 vs $1,399).
Score breakdown
Specs side-by-side
| Spec | KEF LSX II · Black | 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 · Black
- +Easy multi-room with ecosystem
- +App EQ on modern models
- +USB-C/AUX input on some
- −Brand ecosystem lock-in
- −Subscription features on some
- −Bass limits at lower sizes
Sonos Era 300
- +Genuine Atmos from one box
- +Sonos ecosystem polish
- +USB-C line-in
- −Sonos app issues persist
- −Needs Atmos-mastered tracks
- −Bass limits vs larger rivals
FAQ: KEF LSX II · Black vs Sonos Era 300
Which is better, KEF LSX II · Black or Sonos Era 300? +
KEF LSX II · Black scores 92 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.
Is KEF LSX II · Black worth the price? +
At $1,399, KEF LSX II · Black 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 · Black 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.
Which is better for sound, KEF LSX II · Black or Sonos Era 300? +
KEF LSX II · Black — leads on sound (92 vs 90). Compared on the sound sub-score.
Which is better for design, KEF LSX II · Black or Sonos Era 300? +
Sonos Era 300 — leads on design (92 vs 88). Compared on the design sub-score.