Between the Stockwell III and Boom 2 Plus, the Stockwell III comes out ahead in battery, while the Boom 2 Plus wins on output power and low-end response. Overall, the Stockwell III scores 65.3 and the Boom 2 Plus scores 76.4 on our Mars Score.
Which should you buy?
The Boom 2 Plus is the clear pick on raw spec strength, leading by 11.1 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 Stockwell III if you care most about battery. The biggest gaps in its favor are battery.
Pick the Boom 2 Plus if you care most about output power and low-end response. Its strongest claims are output power, low-end response, water resistance.
Both ship with comparable stereo pairing, so those specs don't separate the two — focus on the differences below.
Bottom line: the Boom 2 Plus is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Marshall - Stockwell III wins
- ▲Battery — 35.00% more. 27 h vs 20 h.
Why Anker - Boom 2 Plus wins
- ▲Output power — 366.67% more. 140 W vs 30 W.
- ▲Low-end response — 5.00 Hz less. 45 vs 50.
- ▲Water resistance: IP67 (vs IPX4).
Spec comparison
Audio
| Spec | Marshall - Stockwell III | Anker - Boom 2 Plus |
|---|---|---|
| Output power | 30 W | 140 Wlead |
| Low-end response | 50 Hz | 45 Hzlead |
| Stereo pairing | true | true |
Durability
| Spec | Marshall - Stockwell III | Anker - Boom 2 Plus |
|---|---|---|
| Water resistanceⓘ | IPX4 | IP67lead |
| Weight | 1390 glead | 2700 g |
Battery
| Spec | Marshall - Stockwell III | Anker - Boom 2 Plus |
|---|---|---|
| Battery | 27 hlead | 20 h |
| USB out (powerbank) | false | truelead |
Spec-level deep dives
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