Wired IEMs
HiFiMAN RE400i
78Great
$64
Full review dataHiFiMAN RE400i vs KZ Zenith: which should you buy?
On aggregated review scores the KZ Zenith comes out ahead with an HearWiki score of 82. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: KZ Zenith - Great overall at around $47.
Wired IEMs
KZ Zenith
82Great
$47
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
HiFiMAN RE400i
Sound8.0
Value8.5
KZ Zenith
Sound8.5
Value8.0
Specifications
| Spec | HiFiMAN RE400i | KZ Zenith |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $64 | $47 |
| HearWiki score | 78 / 100 · Great | 82 / 100 · Great |
| Released | 2024 | 2024 |
| Audio | ||
| Driver | Titanium-coated 8.5mm | Full-range ultra-linear Dynamic Driver X |
| Driver size | 8.5 mm | 10 mm |
| Drivers per side | 1 | 1 |
| Frequency response | 15Hz-22kHz | 20Hz-40kHz |
| Impedance | 32 Ω | 41 Ω |
| Sensitivity | 102 dB/mW | 128 dB/mW |
| Battery | ||
| Wireless charging | No | - |
| Features | ||
| ANC type | none | - |
| Transparency mode | No | - |
| Companion app | No | - |
| Custom EQ | No | - |
| Wear detection | No | - |
| Controls | buttons | none |
| Voice assistant | none | - |
| Design | ||
| Weight | 13.5 g | - |
| Detachable cable | - | Yes |
| USB-C | No | No |
| Calls | ||
| Microphones | 1 | - |
What reviewers said
HiFiMAN RE400i
The HiFiMAN RE400i is a compact, lightweight wired IEM that delivers a smooth, accurate, and well-balanced sound signature with good detail retrieval—especially impressive at its budget price point. While it performs admirably from a phone, pairing it with a better source reveals more of its capabilities, though its restrained tuning may not satisfy bass lovers. The main practical drawbacks are its fragile cable and lack of modern conveniences like a mic or app support.
- Pro:Neutral, non-fatiguing sound with good clarity
- Pro:Very comfortable and lightweight for long listening
- Pro:Excellent value for the price
- Con:Cable is weak and requires careful handling
- Con:Bass is restrained, not for bass heads
- Con:No inline mic or phone controls
KZ Zenith
The KZ Zenith is a wired, single-dynamic-driver IEM that delivers a balanced, non-fatiguing sound with punchy bass, detailed mids, and smooth treble. It's highly sensitive and easy to drive, making it a versatile choice for portable use, while its build quality and fit are praised. Despite a few minor caveats, it offers strong technical performance and competes well above its modest price point.
- Pro:Balanced, non-offensive tuning with textured bass
- Pro:Clear and detailed mids with refined treble
- Pro:Very easy to drive and highly sensitive
- Con:No active noise cancellation or controls
- Con:Cable is detachable but not USB-C
- Con:Minor caveats in overall technical refinement
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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