vs
5.7Noise control & calls5.2
9.3Battery4.4
4.1Build & features3.6
Why is Tune 255NC better than Accentum Open?
- Battery life12 h vs 6 h2×
- Total with charging case48 h vs 28 h+71%
- Highest frequency20,000 Hz vs 15,000 Hz+33%
- Lowest frequency20 Hz vs 25 Hz+25%
Why is Accentum Open better than Tune 255NC?
- Charging time2 h vs 1 h2×
- Driver size10 mm vs 11 mm+10%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Open-back |
| Driver type | — | Dynamic |
| Driver size | 10 mm | 11 mm |
| Lowest frequency | 20 Hz | 25 Hz |
| Highest frequency | 20,000 Hz | 15,000 Hz |
| Impedance | 16 Ω | — |
| Sensitivity | 100 dB | 109 dB |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Adaptive ANC | Yes | — |
| Transparency / ambient mode | Yes | — |
| Microphones | — | 2 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 12 h | 6 h |
| Battery life with ANC | 12 h | — |
| Total with charging case | 48 h | 28 h |
| Battery capacity | 65 mAh | — |
| Charging time | 2 h | 1 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.3 |
| Bluetooth codecs | — | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | No |
| aptX | — | No |
| LDAC | — | No |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Weight | 52 g | — |
| Earbud weight (each) | — | 8.7 g |
| Protection rating | IP54 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Dust protection (IP) | 5 | — |
| Colours | Black | Cream, Black, Blush |
| Features | ||
| Touch controls | — | Yes |
| Wear detection (auto pause) | — | Yes |
| Hands-free calls | — | Yes |
