Harman Kardon
Harman Kardon Onyx Studio 8 · Black
Smart/Portable · $399
85
/ 100
From $399
VS
Sonos Era 300 wins by 3
Sonos
Sonos Era 300
Dolby Atmos · Wi-Fi 6 · Spatial audio
88
/ 100
From $449
Specdex verdict
Sonos Era 300 takes it — here’s why.
In our weighted Specdex score, Harman Kardon Onyx Studio 8 · Black lands at 85 and Sonos Era 300 at 88. That puts Sonos Era 300 ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Harman Kardon Onyx Studio 8 · 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
Harman Kardon Onyx Studio 8 · Black 85
vs 88 Sonos Era 300
Score breakdown
Harman Kardon Onyx Studio 8 · Black
85 sound 85
features 83
design 88
ecosystem 84
Sonos Era 300
88 sound 90
features 88
design 92
ecosystem 86
Specs side-by-side
| Spec | Harman Kardon Onyx Studio 8 · 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 |
Harman Kardon Onyx Studio 8 · Black
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: Harman Kardon Onyx Studio 8 · Black vs Sonos Era 300
Which is better, Harman Kardon Onyx Studio 8 · Black or Sonos Era 300? +
Sonos Era 300 scores 88 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.
Is Harman Kardon Onyx Studio 8 · Black worth the price? +
At $399, Harman Kardon Onyx Studio 8 · Black delivers a Specdex score of 85 — strongest in design.
Is Sonos Era 300 worth the price? +
At $449, Sonos Era 300 delivers a Specdex score of 88 — strongest in design.
Does Harman Kardon Onyx Studio 8 · 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.