vs
5.2Noise control & calls3.0
4.4Battery8.7
3.5Build & features7.0
Why is Momentum True Wireless 4 better than OpenFit 2?
- Active noise cancellingYes · OpenFit 2: No
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · OpenFit 2: No
- Lowest frequency5 Hz vs 50 Hz10×
- aptXYes · OpenFit 2: No
- Earbud weight (each)6.2 g vs 9.4 g+52%
- Highest frequency21,000 Hz vs 16,000 Hz+31%
Why is OpenFit 2 better than Momentum True Wireless 4?
- Battery life7 h vs 11 h+57%
- Total with charging case30 h vs 48 h+60%
- Water resistance (IPx)IPx4 vs IPx5+25%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | Open-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 7 mm | — |
| Lowest frequency | 5 Hz | 50 Hz |
| Highest frequency | 21,000 Hz | 16,000 Hz |
| Sensitivity | 107 dB | 94 dB |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Adaptive ANC | Yes | — |
| Transparency / ambient mode | Yes | — |
| Microphones | 3 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 11 h |
| Battery life with ANC | 6 h | — |
| Total with charging case | 30 h | 48 h |
| Battery capacity | — | 56 mAh |
| Charging time | 4 h | — |
| Quick charge (claimed) | 8 min → 1 h | — |
| Fast charging support | Yes | Yes |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | aptX Lossless, aptX Adaptive, aptX, LC3, AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | Yes | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | Yes |
| LE Audio | Yes | — |
| Auracast | Yes | — |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Alexa, Google Assistant | — |
| Design & build | ||
| Earbud weight (each) | 6.2 g | 9.4 g |
| Protection rating | IP54 | IP55 |
| Water resistance (IPx) | IPx4 | IPx5 |
| Dust protection (IP) | 5 | 5 |
| Colours | Black Copper, Black Graphite, Denim, Gold, White Silver | Black, Beige |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
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