Dimensions
Size comparison
M20OB-4
| M20 | OB-4 | Difference | |
|---|---|---|---|
| Height | 279 mm | 284 mm | −5 mm |
| Width | 170 mm | 232.5 mm | −62.5 mm |
| Depth | 296 mm | 57.5 mm | +238.5 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is M20 better than OB-4?
- aptXYes · OB-4: No
Why is OB-4 better than M20?
- Highest frequency22,000 Hz vs 25,000 Hz+14%
- Lowest frequency55 Hz vs 52 Hz+6%
Specifications
Side by side
| Sound | ||
| Output power | — | 10 W |
| Speaker channels | Stereo | 2.0 |
| Channel count | — | 2 |
| Lowest frequency | 55 Hz | 52 Hz |
| Highest frequency | 22,000 Hz | 25,000 Hz |
| Hi-Res Audio | Yes | — |
| Stereo | Yes | Yes |
| Battery & charging | ||
| Battery life | — | 8 h |
| Mains powered | Yes | No |
| Battery powered (portable) | No | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.1 | — |
| Bluetooth codecs | aptX, AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | Yes | No |
| LDAC | No | No |
| USB audio | Yes | — |
| 3.5 mm jack / AUX | Yes | Yes |
| Optical input | Yes | — |
| Design & build | ||
| Weight | — | 1,700 g |
| Width | 170 mm | 232 mm |
| Height | 279 mm | 284 mm |
| Depth | 296 mm | 58 mm |
| Features | ||
| Remote control | Yes | — |
