Wired IEMs
KZ ZST
68Good
$10
Full review dataKZ ZST vs TRN CS3: which should you buy?
On aggregated review scores the KZ ZST comes out ahead with an HearWiki score of 68. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: KZ ZST - Good overall at around $10.
Wired IEMs
TRN CS3
62Average
$5
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
KZ ZST
Sound6.5
Value8.0
TRN CS3
Sound6.0
Value7.0
Specifications
| Spec | KZ ZST | TRN CS3 |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $10 | $5 |
| HearWiki score | 68 / 100 · Good | 62 / 100 · Average |
| Released | 2018 | 2021 |
| Audio | ||
| Driver | Hybrid: 10mm dynamic + 30095 balanced armature | 6mm composite diaphragm dynamic driver |
| Driver size | 10 mm | 6 mm |
| Drivers per side | 2 | 1 |
| Frequency response | 20Hz-20kHz | 20Hz-20000Hz |
| Impedance | 12 Ω | 18 Ω |
| Sensitivity | 120 dB/mW | 118 dB/mW |
| Wireless | ||
| Bluetooth | No (optional Bluetooth module supported) | - |
| Multipoint pairing | No | - |
| Features | ||
| Active noise cancelling | No | - |
| Controls | buttons | - |
| Design | ||
| Weight | 22 g | 11 g |
| Detachable cable | Yes | No |
| USB-C | No | No |
What reviewers said
KZ ZST
The KZ ZST is a budget-friendly hybrid in-ear monitor that pairs a 10mm dynamic driver with a balanced armature for a lively, bass-forward sound. It offers solid low-end punch and good detail retrieval for the price, but its uneven treble and slightly recessed mids can make some vocals and instruments sound harsh or distant. With a detachable cable and lightweight build, it's a decent entry-level option for bass lovers, though comfort and build quality are only average.
- Pro:Strong, punchy bass response
- Pro:Detachable cable for easy replacement or upgrades
- Pro:Very affordable for a hybrid driver setup
- Con:Treble can come across as piercing or harsh at times
- Con:Mids are somewhat recessed, pushing vocals back in the mix
- Con:Fit may not be ideal for long listening sessions
TRN CS3
The TRN CS3 is an ultra-affordable, lightweight in-ear monitor with a single 6mm dynamic driver, designed for comfort and a bass-forward sound. It offers a surprisingly wide and spacious presentation for its tiny size and price, though its resolution and layering are only moderate. It's a decent pick for budget-conscious listeners who prioritize fun, energetic tuning over technical precision.
- Pro:Extremely affordable and lightweight
- Pro:Surprisingly wide soundstage
- Pro:Strong, bass-forward tuning
- Con:Moderate clarity and detail
- Con:Layering and separation are limited
- Con:Non-detachable cable
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
Compare something else
Swap either side out, or start again from the picker.