Sennheiser CX 400-II
The dynamic drivers with neodymium magnets deliver a natural, detailed sound signature that stands out in its price class. Its superior in-ear fit provides high passive noise attenuation and the integrated volume control adds convenient playback management. These wired earphones are best for budget-conscious listeners seeking a significant audio upgrade from stock earbuds for their MP3 players or phones.
Snapshot
Pros & Cons
Pros
- Strong comfort (71st percentile) 71st
Cons
- Below average connectivity (9th percentile)
- Below average mic (9th percentile)
- Below average user sentiment (16th percentile)
- Below average sound (27th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 11 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Design
| Form Factor | in-ear |
| Ear Tips | S, M, L |
| Weight | 0.1 kg / 0.1 lbs |
Audio
| Driver Type | dynamic |
| Impedance | 16 |
vs Competition
| Spec | Sennheiser CX 400-II | Samsung Galaxy Buds Buds3 Pro | EarFun Air Pro 4+ | Soundcore P31i | Nothing Buds 2 | Baseus Bass BP1 Pro |
|---|---|---|---|---|---|---|
| Form Factor | in-ear | in-ear | in-ear | in-ear | in-ear | in-ear |
| Driver Type | dynamic | dynamic | hybrid | dynamic | dynamic | dynamic |
| Wireless | - | true | true | true | true | true |
| Active Noise Cancellation | - | true | true | true | true | true |
| Bluetooth Version | - | 5.4 | 6.0 | 6.1 | 5.4 | 6.0 |
| Battery Life Hours | - | 6 | 12 | 10 | 13.5 | 12 |
| Case Battery Hours | - | 26 | 54 | 50 | 55 | 55 |
| Water Resistance | - | IP57 | IP55 | IP55 | IP55 | IP55 |
| Multipoint | - | true | true | - | false | true |
| Compare | Compare | Compare | Compare | Compare |
| Product | Anc | Mic | Build | Sound | Battery | Comfort | User Sentiment | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|---|
| Sennheiser CX 400-II | 28.8 | 8.8 | 32.8 | 26.6 | 46.3 | 71.3 | 15.9 | 8.5 | 54.5 |
| Samsung Galaxy Buds Buds3 Pro Compare | 96.6 | 96.6 | 98.7 | 91.5 | 71.6 | 93.2 | 78.7 | 99.6 | 86.9 |
| EarFun Air Pro 4+ Compare | 96.6 | 96.6 | 90.8 | 99.8 | 95.5 | 71.3 | 97.5 | 99.2 | 86.9 |
| Soundcore P31i Compare | 88.1 | 96.6 | 90.8 | 96.4 | 93.4 | 71.3 | 97.5 | 75.9 | 94.7 |
| Nothing Buds 2 Compare | 91.8 | 96.6 | 90.8 | 66.6 | 96 | 71.3 | 91.9 | 86.5 | 86.9 |
| Baseus Bass BP1 Pro Compare | 96.6 | 96.6 | 90.8 | 86.7 | 95.5 | 71.3 | 91.9 | 98.4 | 75.9 |
Price
Value & Pricing
Amazon.co.uk 1 offer From £23
We started tracking prices for this product on May 30, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
