Between the Boombox 3 and Stockwell III, the Boombox 3 comes out ahead in output power and low-end response, while the Stockwell III wins on battery. Overall, the Boombox 3 scores 86.4 and the Stockwell III scores 65.3 on our Mars Score.
Which should you buy?
The Boombox 3 is the clear pick on raw spec strength, leading by 21.1 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 Boombox 3 if you care most about output power and low-end response. The biggest gaps in its favor are output power, low-end response, water resistance.
Pick the Stockwell III if you care most about battery. Its strongest claims are battery.
Both ship with comparable stereo pairing, so those specs don't separate the two — focus on the differences below.
Bottom line: the Boombox 3 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why JBL - Boombox 3 wins
- ▲Output power — 500.00% more. 180 W vs 30 W.
- ▲Low-end response — 10.00 Hz less. 40 vs 50.
- ▲Water resistance: IP67 (vs IPX4).
Why Marshall - Stockwell III wins
- ▲Battery — 12.50% more. 27 h vs 24 h.
Spec comparison
Audio
| Spec | JBL - Boombox 3 | Marshall - Stockwell III |
|---|---|---|
| Output power | 180 Wlead | 30 W |
| Low-end response | 40 Hzlead | 50 Hz |
| Stereo pairing | true | true |
Durability
| Spec | JBL - Boombox 3 | Marshall - Stockwell III |
|---|---|---|
| Water resistanceⓘ | IP67lead | IPX4 |
| Weight | 6500 g | 1390 glead |
Battery
| Spec | JBL - Boombox 3 | Marshall - Stockwell III |
|---|---|---|
| Battery | 24 h | 27 hlead |
| USB out (powerbank) | truelead | false |
Spec-level deep dives
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