Why is iO-8 better than Ace Ultra?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Ace Ultra: No
- Charging time2 h vs 3 h+50%
- Driver size50 mm vs 40 mm+25%
Why is Ace Ultra better than iO-8?
- Bluetooth version5.2 vs 6+15%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | — |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | Dynamic |
| Driver size | 50 mm | 40 mm |
| Number of drivers | 1 | — |
| Lowest frequency | 10 Hz | — |
| Highest frequency | 43,000 Hz | — |
| Impedance | 25 Ω | — |
| Sensitivity | 100 dB | — |
| Spatial / 3D audio | — | Yes |
| Head tracking | — | Yes |
| Dolby Atmos | — | Yes |
| Hi-Res Audio | Yes | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Adaptive ANC | Yes | — |
| Transparency / ambient mode | Yes | Yes |
| Microphones | — | 5 |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 35 h | 35 h |
| Battery life with ANC | — | 35 h |
| Charging time | 2 h | 3 h |
| Quick charge (claimed) | — | 3 min → 3 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 6 |
| Bluetooth codecs | aptX Adaptive, aptX HD, aptX, AAC | aptX, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | Yes | Yes |
| LDAC | No | No |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Design & build | ||
| Weight | — | 322 g |
| Protection rating | IP52 | — |
| Water resistance (IPx) | IPx2 | — |
| Dust protection (IP) | 5 | — |
| Foldable | Yes | Yes |
| Features | ||
| Hands-free calls | — | Yes |
