Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Marshall - Emberton III | Sonos - Roam 2 |
|---|---|---|
| Battery | 32 h | 10 h |
| Output power | 20 W | 30 W |
Between the Emberton III and Roam 2, the Emberton III comes out ahead in battery, while the Roam 2 wins on output power. Overall, the Emberton III scores 79.3 and the Roam 2 scores 66 on our Mars Score.
Which should you buy?
The Emberton III is the clear pick on raw spec strength, leading by 13.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Emberton III if you care most about battery. The biggest gaps in its favor are battery. The single most decisive one: Battery — 220.00% more. 32 h vs 10 h.
Pick the Roam 2 if you care most about output power. Its strongest claims are output power. The single most decisive one: Output power — 50.00% more. 30 W vs 20 W.
Both ship with comparable water resistance, low-end response, stereo pairing, so those specs do not separate the two — focus on the differences below.
Bottom line: the Emberton III is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Marshall - Emberton III or Sonos - Roam 2?
Marshall - Emberton III leads the current Mars Score by 13.3 points.The more useful decision is the trade-off behind that result: compare output power, battery against the way you will actually use the product.
Choose Marshall - Emberton III if…
Marshall - Emberton III has the measurable edge on battery h.
Choose Sonos - Roam 2 if…
Sonos - Roam 2 has the measurable edge on output w.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Marshall - Emberton III wins
- ▲Battery — 220.00% more. 32 h vs 10 h.
Why Sonos - Roam 2 wins
- ▲Output power — 50.00% more. 30 W vs 20 W.
Spec comparison
Audio
| Spec | Marshall - Emberton III | Sonos - Roam 2 |
|---|---|---|
| Output power | 20 W | 30 Wlead |
| Low-end response | 60 Hz | 60 Hz |
| Stereo pairingⓘ | true | true |
Durability
| Spec | Marshall - Emberton III | Sonos - Roam 2 |
|---|---|---|
| Water resistanceⓘ | IP67 | IP67 |
| Weight | 700 g | 430 glead |
Battery
| Spec | Marshall - Emberton III | Sonos - Roam 2 |
|---|---|---|
| Battery | 32 hlead | 10 h |
| USB out (powerbank) | false | false |