Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | JBL - Boombox 3 | Marshall - Stockwell III |
|---|---|---|
| Output power | 180 W | 30 W |
| Battery | 24 h | 27 h |
| Low-end response | 40 Hz | 50 Hz |
| Water resistance | IP67 | IPX4 |
Between the Boombox 3 and Stockwell III, the Boombox 3 comes out ahead in output power / low-end response, while the Stockwell III wins on battery. Overall, the Boombox 3 scores 87.5 and the Stockwell III scores 68.6 on our Mars Score.
Which should you buy?
The Boombox 3 is the clear pick on raw spec strength, leading by 18.9 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 / low-end response. The biggest gaps in its favor are output power, low-end response, water resistance. The single most decisive one: Output power — 500.00% more. 180 W vs 30 W.
Pick the Stockwell III if you care most about battery. Its strongest claims are battery. The single most decisive one: Battery — 12.50% more. 27 h vs 24 h.
Both ship with comparable stereo pairing, so those specs do not 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.
Which should you buy: JBL - Boombox 3 or Marshall - Stockwell III?
JBL - Boombox 3 leads the current Mars Score by 18.9 points.The more useful decision is the trade-off behind that result: compare output power, battery, water resistance against the way you will actually use the product.
Choose JBL - Boombox 3 if…
JBL - Boombox 3 has the measurable edge on output w, frequency low hz, ip rating.
Choose Marshall - Stockwell III if…
Marshall - Stockwell III has the measurable edge on battery h.
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 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 |