vs
Why is RETRO BOX FIO-RETROBOX better than Session 540?
- Output power11 W vs 10 W+6%
- Bluetooth version6 vs 5.3+13%
Why is Session 540 better than RETRO BOX FIO-RETROBOX?
- Battery life10.5 h vs 40 h3.8×
- Lowest frequency65 Hz vs 20 Hz3.2×
Specifications
Side by side
| Sound | ||
| Driver size | — | 49.5 mm |
| Output power | 11 W | 10 W |
| Lowest frequency | 65 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | — | Yes |
| Battery & charging | ||
| Battery life | 10.5 h | 40 h |
| Quick charge (claimed) | — | 10 min → 3.5 h |
| Fast charging support | — | Yes |
| Battery powered (portable) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 6 | 5.3 |
| Multipoint (two devices) | — | Yes |
| LE Audio | — | Yes |
| Auracast | — | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | — | 320 g |
| Width | 99 mm | — |
| Height | 76 mm | — |
| Depth | 153 mm | — |
| Protection rating | — | IP67 |
| Water resistance (IPx) | — | IPx7 |
| Dust protection (IP) | — | 6 |
| Colours | — | Plasma, Primer, True Black, Cement |
| Features | ||
| Hands-free calls | Yes | — |
| Party / stereo pairing | — | Yes |




