vs
Dimensions
Size comparison
TOPROCK SYS3 BT20 137 USB-CMiddleton II
| TOPROCK SYS3 BT20 137 USB-C | Middleton II | Difference | |
|---|---|---|---|
| Height | 137 mm | 110 mm | +27 mm |
| Width | 396 mm | 230 mm | +166 mm |
| Depth | 296 mm | 98 mm | +198 mm |
| Weight | 2,800 g | 1,800 g | +1,000 g |
Drawn to the same scale from the official dimensions (front and side).
Why is TOPROCK SYS3 BT20 137 USB-C better than Middleton II?
TOPROCK SYS3 BT20 137 USB-C has no measurable advantages in this pair.
Why is Middleton II better than TOPROCK SYS3 BT20 137 USB-C?
- Output power20 W vs 40 W2×
- Weight2,800 g vs 1,800 g+56%
- Bluetooth version5 vs 5.3+6%
Specifications
Side by side
| Sound | ||
| Driver type | — | Neodymium |
| Driver size | — | 76.2 mm |
| Output power | 20 W | 40 W |
| Speaker channels | — | 2.0 |
| Channel count | — | 2 |
| Lowest frequency | — | 45 Hz |
| Highest frequency | — | 20,000 Hz |
| Spatial / 3D audio | — | Yes |
| Stereo | Yes | Yes |
| Battery & charging | ||
| Battery life | — | 30 h |
| Charging time | — | 3 h |
| Quick charge (claimed) | — | 20 min → 10 h |
| Fast charging support | — | Yes |
| Power bank function | Yes | Yes |
| Mains powered | No | No |
| Battery powered (portable) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5 | 5.3 |
| Bluetooth codecs | SBC | LC3, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | — | Yes |
| LE Audio | — | Yes |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | — | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | 2,800 g | 1,800 g |
| Width | 396 mm | 230 mm |
| Height | 137 mm | 110 mm |
| Depth | 296 mm | 98 mm |
| Protection rating | — | IP67 |
| Water resistance (IPx) | — | IPx7 |
| Dust protection (IP) | — | 6 |
| Features | ||
| Hands-free calls | — | Yes |
| Party / stereo pairing | Yes | — |
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