Wired IEMs
Campfire Audio Astrolith - Dual Planar IEM
87Outstanding
$2199
Full review dataCampfire Audio Astrolith - Dual Planar IEM vs KZ ZSX Pro: which should you buy?
On aggregated review scores the Campfire Audio Astrolith - Dual Planar IEM comes out ahead with an HearWiki score of 87. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Campfire Audio Astrolith - Dual Planar IEM - Outstanding overall at around $2199.
Wired IEMs
KZ ZSX Pro
68Good
Price n/a
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Campfire Audio Astrolith - Dual Planar IEM
Sound9.0
Value6.5
KZ ZSX Pro
Sound7.0
Value7.5
Specifications
| Spec | Campfire Audio Astrolith - Dual Planar IEM | KZ ZSX Pro |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $2199 | - |
| HearWiki score | 87 / 100 · Outstanding | 68 / 100 · Good |
| Released | 2024 | 2024 |
| Audio | ||
| Driver | Dual Planar | 12 Drivers |
| Driver size | 14.2 mm | 10 mm |
| Drivers per side | 2 | 6 |
| Frequency response | 5Hz-25kHz | 20Hz-40kHz |
| Impedance | 8.2 Ω | 24 Ω |
| Sensitivity | 94 dB/mW | 103 dB/mW |
| Wireless | ||
| Multipoint pairing | No | No |
| Features | ||
| Active noise cancelling | No | No |
| Controls | - | buttons |
| Voice assistant | none | - |
| Design | ||
| Weight | - | 31 g |
| Detachable cable | Yes | - |
| Calls | ||
| Microphones | - | 1 |
What reviewers said
Campfire Audio Astrolith - Dual Planar IEM
The Campfire Audio Astrolith is a premium dual-planar IEM that delivers a fast, clear, and highly detailed sound with impressive staging and technical precision. Its nearly flat impedance and very low distortion make it a strong performer, though it benefits from quality sources and has a couple of minor ergonomic quirks. Overall, it's a notable step forward in the brand's planar lineup, offering a cohesive and resolving listen for those seeking top-tier wired performance.
- Pro:Exceptional speed and clarity across the frequency range
- Pro:Very low distortion and flat impedance for consistent performance
- Pro:Wide, well-defined soundstage with precise imaging
- Con:Slight mid-bass bloom can color certain tracks
- Con:Stock ear tips are not very good and may need replacement
- Con:Best results require a high-quality source or amplifier
KZ ZSX Pro
The KZ ZSX Pro is a budget-friendly in-ear monitor that punches above its price class with a balanced, engaging sound signature, featuring solid bass, clear mids, and detailed treble. While it offers impressive performance for the cost, its large shell design and subpar stock cable are notable compromises, and a slight treble peak can lead to listening fatigue for some. Overall, it's a strong value for those prioritizing sound quality over comfort and accessories.
- Pro:Excellent value for the price, competing with higher-tier IEMs
- Pro:Well-balanced tuning with deep bass and detailed treble
- Pro:Wide soundstage for its class
- Con:Large shells may be uncomfortable for smaller ears
- Con:Stock cable is cheap and needs upgrading
- Con:Treble can sound harsh or grainy at times
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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