vs
6.9Battery5.7
8.9Build & features8.1
Dimensions
Size comparison
Willen IIWonderboom 4
| Willen II | Wonderboom 4 | Difference | |
|---|---|---|---|
| Height | 100.5 mm | 104 mm | −3.5 mm |
| Width | 100.5 mm | 95.3 mm | +5.2 mm |
| Depth | 43.5 mm | 95.3 mm | −51.8 mm |
| Weight | 360 g | 420 g | −60 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Willen II better than Wonderboom 4?
- Battery life17 h vs 14 h+21%
- Weight360 g vs 420 g+17%
- Charging time2.5 h vs 2.6 h+4%
Why is Wonderboom 4 better than Willen II?
Wonderboom 4 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Driver type | Dynamic | — |
| Driver size | 50.8 mm | — |
| Output power | 38 W | — |
| Speaker channels | 1.0 | — |
| Channel count | 1 | — |
| Lowest frequency | 75 Hz | — |
| Highest frequency | 20,000 Hz | — |
| Spatial / 3D audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Stereo | No | — |
| Battery & charging | ||
| Battery life | 17 h | 14 h |
| Charging time | 2.5 h | 2.6 h |
| Quick charge (claimed) | 20 min → 5.5 h | — |
| Fast charging support | Yes | — |
| Mains powered | No | No |
| Battery powered (portable) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | — |
| Bluetooth codecs | SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| LE Audio | Yes | — |
| Auracast | Yes | — |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Weight | 360 g | 420 g |
| Width | 100 mm | 95 mm |
| Height | 100 mm | 104 mm |
| Depth | 44 mm | 95 mm |
| Protection rating | IP67 | IP67 |
| Water resistance (IPx) | IPx7 | IPx7 |
| Dust protection (IP) | 6 | 6 |
| Floats | — | Yes |
| Features | ||
| Hands-free calls | Yes | — |
