Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Marshall - Stockwell III | Logitech - MEGABOOM 4 |
|---|---|---|
| Battery | 27 h | 20 h |
| Low-end response | 50 Hz | 60 Hz |
| Water resistance | IPX4 | IP67 |
| Output power | 30 W |
Between the Stockwell III and MEGABOOM 4, the Stockwell III comes out ahead in battery / low-end response, while the MEGABOOM 4 wins on water resistance. Overall, the Stockwell III scores 68.6 and the MEGABOOM 4 scores 78 on our Mars Score.
Which should you buy?
The MEGABOOM 4 is the clear pick on raw spec strength, leading by 9.4 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 / low-end response. The biggest gaps in its favor are battery, low-end response, output power. The single most decisive one: Battery — 35.00% more. 27 h vs 20 h.
Pick the MEGABOOM 4 if you care most about water resistance. Its strongest claims are water resistance. The single most decisive one: Water resistance: IP67 (vs IPX4).
Both ship with comparable stereo pairing, so those specs do not separate the two — focus on the differences below.
Bottom line: the MEGABOOM 4 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 - Stockwell III or Logitech - MEGABOOM 4?
Logitech - MEGABOOM 4 leads the current Mars Score by 9.4 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 Marshall - Stockwell III if…
Marshall - Stockwell III has the measurable edge on battery h, frequency low hz, output w.
Choose Logitech - MEGABOOM 4 if…
Logitech - MEGABOOM 4 has the measurable edge on ip rating.
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 - Stockwell III wins
- ▲Battery — 35.00% more. 27 h vs 20 h.
- ▲Low-end response — 10.00 Hz less. 50 vs 60.
- ▲Output power: 30 W vs W.
Why Logitech - MEGABOOM 4 wins
- ▲Water resistance: IP67 (vs IPX4).
Spec comparison
Audio
| Spec | Marshall - Stockwell III | Logitech - MEGABOOM 4 |
|---|---|---|
| Output power | 30 Wlead | |
| Low-end response | 50 Hzlead | 60 Hz |
| Stereo pairingⓘ | true | true |
Durability
| Spec | Marshall - Stockwell III | Logitech - MEGABOOM 4 |
|---|---|---|
| Water resistanceⓘ | IPX4 | IP67lead |
| Weight | 1390 g | 1230 glead |
Battery
| Spec | Marshall - Stockwell III | Logitech - MEGABOOM 4 |
|---|---|---|
| Battery | 27 hlead | 20 h |
| USB out (powerbank) | false | false |