True Wireless
Sennheiser CX 400BT
68Good
$202
Full review dataSennheiser CX 400BT vs Soundcore Liberty 4 Pro: which should you buy?
On aggregated review scores the Soundcore Liberty 4 Pro comes out ahead with an HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Soundcore Liberty 4 Pro - Great overall at around $150.
True Wireless
Soundcore Liberty 4 Pro
84Great
$150
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Sennheiser CX 400BT
Sound7.5
Battery6.5
Calls7.0
Value7.0
Soundcore Liberty 4 Pro
Sound8.5
Noise cancelling8.0
Battery7.5
Calls8.0
Value8.5
Specifications
| Spec | Sennheiser CX 400BT | Soundcore Liberty 4 Pro |
|---|---|---|
| Type | True Wireless | True Wireless |
| Price (USD) | $202 | $150 |
| HearWiki score | 68 / 100 · Good | 84 / 100 · Great |
| Released | 2021 | 2024 |
| Audio | ||
| Driver | dynamic | dynamic |
| Driver size | 7 mm | 10.5 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 5Hz-21kHz | 14Hz-40kHz |
| Impedance | 28 Ω | 15.3 Ω |
| Sensitivity | 107 dB/mW | - |
| Wireless | ||
| Bluetooth | 5.x | 5.3 |
| Bluetooth version | 5.1 | 5.3 |
| Codecs | SBC, AAC, aptX | SBC, AAC, LDAC |
| Multipoint pairing | No | Yes |
| Battery | ||
| Battery life | 7 h | 10 h |
| Battery life (ANC on) | - | 7.5 h |
| Battery incl. case | 20 h | 40 h |
| Full charge time | 90 min | - |
| Quick charge | 10 min = 1 h | 5 min = 4 h |
| Wireless charging | No | Yes |
| Features | ||
| Active noise cancelling | No | Yes |
| ANC type | - | hybrid |
| Transparency mode | - | Yes |
| Companion app | - | Yes |
| Custom EQ | - | Yes |
| Wear detection | - | Yes |
| Controls | - | touch |
| Voice assistant | - | supports voice assistant via app |
| Design | ||
| Weight | 6 g | 5.5 g |
| Case weight | 37 g | 51 g |
| Water resistance | none | IPX5 |
| USB-C | Yes | Yes |
| Calls | ||
| Microphones | 2 | 6 |
| Call noise reduction | - | AI noise reduction |
What reviewers said
Sennheiser CX 400BT
The Sennheiser CX 400BT true wireless earbuds deliver impressive audio quality with a warm, balanced sound signature, making them a strong choice for music lovers. They offer solid battery life and reliable call performance, though their design is somewhat bulky and they lack modern conveniences like active noise cancellation and auto-pause. At a reduced price, they represent good value, but they face stiff competition from newer models with more features.
- Pro:Excellent, warm sound quality
- Pro:Good battery life
- Pro:Reliable call performance
- Con:Bulky design
- Con:No active noise cancellation
- Con:Lacks auto-pause and transparency mode
Soundcore Liberty 4 Pro
The Soundcore Liberty 4 Pro pack a hefty feature set into a budget-friendly wireless earbud package, including adaptive noise cancellation, LDAC support, multipoint connectivity, and wireless charging. They deliver solid sound with crisp treble and effective call quality, though the charging case can feel gimmicky and prone to fingerprints, and spatial audio falls short. Overall, they're a well-rounded value pick rather than a flagship-level performer.
- Pro:Strong active noise cancellation
- Pro:Wide codec support including LDAC
- Pro:Multipoint and wireless charging included
- Con:Charging case feels gimmicky and smudges easily
- Con:Spatial audio performance is weak
- Con:Battery life is average for the price
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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