Wired IEMs
Moondrop JIU
74Good
$19
Full review dataMoondrop JIU vs TRN CS4: which should you buy?
On aggregated review scores the Moondrop JIU comes out ahead with an HearWiki score of 74. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Moondrop JIU - Good overall at around $19.
Wired IEMs
TRN CS4
62Average
$10
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Moondrop JIU
Sound7.5
Value8.0
TRN CS4
Sound6.0
Value7.0
Specifications
| Spec | Moondrop JIU | TRN CS4 |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $19 | $10 |
| HearWiki score | 74 / 100 · Good | 62 / 100 · Average |
| Released | 2023 | 2022 |
| Audio | ||
| Driver | 10mm High-performance Dynamic Driver | 10mm dual magnet dynamic driver |
| Driver size | 10 mm | 10 mm |
| Drivers per side | 1 | 1 |
| Frequency response | 10Hz-35kHz | 20Hz-20kHz |
| Impedance | 32 Ω | 23 Ω |
| Sensitivity | 110 dB/mW | 118 dB/mW |
| Wireless | ||
| Multipoint pairing | No | No |
| Features | ||
| Active noise cancelling | No | No |
| Design | ||
| Weight | - | 16.2 g |
| Detachable cable | No | Yes |
| USB-C | Yes | Yes |
| Calls | ||
| Microphones | 1 | - |
| Call noise reduction | DSP microphone | - |
What reviewers said
Moondrop JIU
The Moondrop JIU is an affordable wired USB-C earphone that delivers surprisingly polished sound for its price, with a well-tuned dynamic driver and a DSP microphone for calls. It's a sensible pick for casual listeners who value simplicity, though its non-detachable cable and occasionally bright treble may deter some. Overall, it offers solid value within the still-narrow field of DSP-equipped budget IEMs.
- Pro:Excellent tuning for the price
- Pro:Good technical performance for a budget model
- Pro:USB-C connectivity with DSP mic for clear calls
- Con:Treble can be overly bright for some
- Con:Fixed cable cannot be replaced
- Con:Not an elite technical performer
TRN CS4
The TRN CS4 is an ultra-affordable in-ear monitor that offers surprising detail retrieval and a lively treble response for its price, along with decent spatial cues. However, its stock tuning can come across as aggressive or harsh, and it may require some tweaking to unlock its full potential for a smoother listening experience.
- Pro:Very affordable price point
- Pro:Strong treble energy and detail
- Pro:Surprisingly good imaging and soundstage for the cost
- Con:Stock tuning can sound harsh or bright
- Con:Lacks refinement and polish out of the box
- Con:May require modification or EQ to sound balanced
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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