Dimensions
Size comparison
SP-WS04BTWillen II
| SP-WS04BT | Willen II | Difference | |
|---|---|---|---|
| Height | 102 mm | 100.5 mm | +1.5 mm |
| Width | 166 mm | 100.5 mm | +65.5 mm |
| Depth | 50 mm | 43.5 mm | +6.5 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is SP-WS04BT better than Willen II?
- StereoYes · Willen II: No
Why is Willen II better than SP-WS04BT?
- Output power20 W vs 38 W+90%
- Battery life15 h vs 17 h+13%
Specifications
Side by side
| Sound | ||
| Driver type | — | Dynamic |
| Driver size | — | 50.8 mm |
| Output power | 20 W | 38 W |
| Speaker channels | Stereo | 1.0 |
| Channel count | — | 1 |
| Lowest frequency | — | 75 Hz |
| Highest frequency | — | 20,000 Hz |
| Stereo | Yes | No |
| Battery & charging | ||
| Battery life | 15 h | 17 h |
| Charging time | — | 2.5 h |
| Quick charge (claimed) | — | 20 min → 5.5 h |
| Fast charging support | — | Yes |
| Mains powered | — | No |
| Battery powered (portable) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.3 |
| Bluetooth codecs | — | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | No |
| aptX | — | No |
| LDAC | — | No |
| LE Audio | — | Yes |
| Auracast | — | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | Yes | — |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | — | 360 g |
| Width | 166 mm | 100 mm |
| Height | 102 mm | 100 mm |
| Depth | 50 mm | 44 mm |
| Protection rating | IP67 | IP67 |
| Water resistance (IPx) | IPx7 | IPx7 |
| Dust protection (IP) | 6 | 6 |
| Features | ||
| Hands-free calls | — | Yes |
| Party / stereo pairing | Yes | — |
