vs
5.1Sound5.5
4.0Noise control & calls4.9
8.2Battery7.8
7.0Build & features4.6
Why is AeroFit 2 better than Liberty 4 NC?
- Charging time1 h vs 3 h3×
- Water resistance (IPx)IPx5 vs IPx4+25%
- Driver size16.2 mm vs 11 mm+47%
Why is Liberty 4 NC better than AeroFit 2?
- Total with charging case42 h vs 50 h+19%
- Earbud weight (each)10 g vs 5.2 g+92%
- Microphones4 vs 6+50%
Specifications
Side by side
| Sound | ||
| Fit | Open-ear | In-ear |
| Ear cup design | Open-back | — |
| Driver type | Dynamic | Dynamic |
| Driver size | 16.2 mm | 11 mm |
| Number of drivers | 1 | — |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | 10 Ω |
| Hi-Res Audio | Yes | Yes |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | No | No |
| Adaptive ANC | — | Yes |
| Transparency / ambient mode | — | Yes |
| Microphones | 4 | 6 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 10 h | 10 h |
| Total with charging case | 42 h | 50 h |
| Charging time | 1 h | 3 h |
| Quick charge (claimed) | 10 min → 4 h | — |
| Fast charging support | Yes | — |
| Wireless charging (case) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.3 |
| Bluetooth codecs | LDAC | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | Yes |
| aptX | No | No |
| LDAC | Yes | Yes |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | 10 g | 5.2 g |
| Protection rating | IP55 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Dust protection (IP) | 5 | — |
| Colours | Midnight Black, Pearl White, Minty Green, Midnight Blue, Brown | Velvet Black, Clear White, Navy Blue, Pastel Pink, Light Blue |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
