Image © KZThe KZ ZS4 is a hybrid in-ear monitor featuring an 8mm dynamic driver and a 30095 balanced armature, designed for detailed sound with a focus on bass response. It offers a detachable 0.75mm 2-pin cable and ergonomic design for comfortable wear.
The KZ ZS4 is an affordable hybrid IEM pairing an 8mm dynamic driver with a balanced armature to deliver a lively, bass-forward sound. It's built for listeners who enjoy energetic, V-shaped tuning with strong detail retrieval, though its emphasis on lows and highs can overshadow the midrange. With a comfortable fit and low price, it offers impressive value for those seeking a fun, engaging listen rather than a neutral one.
Paraphrased from published reviews & specs - not an original hands-on test. Our AI disclosure.
| Driver | 1DD + 1BA hybrid |
|---|---|
| Driver type | hybrid |
| Driver configuration | 1DD + 1BA |
| Drivers per side | 2 |
| Frequency response | 20 Hz - 40 kHz |
| Impedance | 18 Ω |
| Sensitivity | 101 dB/mW |
| Driver | 1DD + 1BA hybrid |
|---|---|
| Driver type | hybrid |
| Driver configuration | 1DD + 1BA |
| Drivers per side | 2 |
| Frequency response | 20 Hz - 40 kHz |
| Impedance | 18 Ω |
| Sensitivity | 101 dB/mW |
| Active noise cancelling | No |
|---|---|
| ANC type | none |
| Transparency mode | No |
| Companion app | No |
| Custom EQ | No |
| Wear detection | No |
| Controls | buttons |
| Weight | 23 g |
|---|---|
| Detachable cable | Yes |
| USB-C | No |
| Connector | 3.5 mm |
| Microphones | 1 |
|---|
5 source(s) feeding this product's score.
Video reviews we found, each condensed to its verdict. They do feed the HearWiki score, at a measured weight below what a published written review carries.
3:57The reviewer finds the KZ ZS4 to be a solid budget earphone with improved sound quality over the ZS3, featuring dual drivers that add detail and instrument separation. The bass is well-balanced, mids are neutral, and highs are bright but slightly sibilant. Fit is decent but requires occasional adjustment, and the stock cable is flimsy, so an upgrade is recommended.
8:35The reviewer finds the KZ ZS4 to be a fun, bass-heavy earphone with excellent isolation and good articulation, especially with well-recorded older music. However, it can sound shrill on newer recordings, has a fit that creates pressure in the ear canal, and is not neutral, making it less suitable for critical listening. Overall, it's a good value under $20 but not the best in KZ's lineup.
Summaries are AI condensations of each video's own conclusion, not transcripts. Titles, thumbnails and view counts belong to their channels.
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