vs
9.4Sound6.9
4.9Connectivity9.3
Why is Acton IV better than Session 900?
- Output power110 W vs 50 W2.2×
- Highest frequency38,000 Hz vs 20,000 Hz+90%
- Lowest frequency37 Hz vs 50 Hz+35%
- Driver size101.6 mm vs 93 mm+9%
Why is Session 900 better than Acton IV?
- Weight2,650 g vs 1,050 g2.5×
- Bluetooth version5.3 vs 6+13%
Specifications
Side by side
| Sound | ||
| Driver type | Dynamic | — |
| Driver size | 101.6 mm | 93 mm |
| Output power | 110 W | 50 W |
| Speaker channels | Stereo | — |
| Channel count | 2 | — |
| Lowest frequency | 37 Hz | 50 Hz |
| Highest frequency | 38,000 Hz | 20,000 Hz |
| Spatial / 3D audio | — | Yes |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Stereo | Yes | — |
| Battery & charging | ||
| Battery life | — | 49 h |
| Quick charge (claimed) | — | 10 min → 3.5 h |
| Fast charging support | — | Yes |
| Power bank function | — | Yes |
| Mains powered | Yes | — |
| Battery powered (portable) | No | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 6 |
| Bluetooth codecs | LDAC, LC3, AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | — |
| aptX | No | — |
| LDAC | Yes | — |
| Multipoint (two devices) | Yes | Yes |
| LE Audio | Yes | Yes |
| Auracast | Yes | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | Yes | — |
| Smart & streaming | ||
| Spotify Connect | Yes | — |
| Companion app | Yes | Yes |
| Design & build | ||
| Weight | 2,650 g | 1,050 g |
| Width | 260 mm | — |
| Height | 171 mm | — |
| Depth | 150 mm | — |
| Protection rating | — | IP67 |
| Water resistance (IPx) | — | IPx7 |
| Dust protection (IP) | — | 6 |
| Colours | — | Cement, True Black, Primer |
| Features | ||
| Hands-free calls | — | Yes |
| Party / stereo pairing | Yes | Yes |
