Wired IEMs
KZ Castor Pro
68Good
$24
Full review dataKZ Castor Pro vs Sivga SM100: which should you buy?
On aggregated review scores the Sivga SM100 comes out ahead with an HearWiki score of 78. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Sivga SM100 - Great overall at around $35.
Wired IEMs
Sivga SM100
78Great
$35
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
KZ Castor Pro
Sound7.0
Value8.0
Sivga SM100
Sound8.0
Value8.5
Specifications
| Spec | KZ Castor Pro | Sivga SM100 |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $24 | $35 |
| HearWiki score | 68 / 100 · Good | 78 / 100 · Great |
| Released | 2024 | 2026 |
| Audio | ||
| Driver | 10mm+10mm Dual Dynamic Drivers | single dynamic driver, dual-chamber PU + sapphire-like ceramic composite diaphragm |
| Driver size | 10 mm | 10 mm |
| Drivers per side | 2 | 1 |
| Frequency response | 20 Hz - 40 kHz | 20 Hz - 40 kHz |
| Impedance | 16 Ω | 27 Ω |
| Sensitivity | - | 107 dB/mW |
| Wireless | ||
| Multipoint pairing | No | No |
| Battery | ||
| Quick charge | none | - |
| Wireless charging | No | - |
| Features | ||
| Active noise cancelling | No | - |
| ANC type | none | - |
| Transparency mode | No | - |
| Companion app | No | - |
| Custom EQ | No | - |
| Wear detection | No | - |
| Controls | buttons | - |
| Voice assistant | No | - |
| Design | ||
| Weight | - | 7 g |
| Water resistance | - | none |
| Detachable cable | - | Yes |
| USB-C | No | No |
| Calls | ||
| Microphones | - | 1 |
What reviewers said
KZ Castor Pro
The KZ Castor Pro is an ultra-affordable dual-dynamic-driver IEM that packs a surprising amount of tuning flexibility for its price. While it brings some technical improvements over its predecessor, its appeal depends heavily on your preference for bass-heavy or balanced sound, as its adjustable switches let you shape the low end. It's a solid budget pick for gaming and bass lovers, though it doesn't drastically outshine the original Castor for everyone.
- Pro:Quad-switch tuning for adjustable bass response
- Pro:Very affordable dual-driver setup
- Pro:Strong low-end impact and flexibility
- Con:No app support or EQ customization
- Con:Lacks a compelling upgrade over the standard Castor
- Con:Sound signature may feel too bass-forward for some
Sivga SM100
The Sivga SM100 is a budget-friendly single-dynamic-driver IEM that punches above its price class with an open, cohesive sound signature. It delivers impressive detail retrieval and well-controlled bass for the cost, though it does compromise on sub-bass depth and top-end airiness. Overall, it's a solid pick for listeners who value clarity and balance over extreme extension.
- Pro:Excellent clarity and detail for the price
- Pro:Balanced, cohesive tuning with controlled bass
- Pro:Lightweight and comfortable with detachable cable
- Con:Sub-bass extension is limited
- Con:Treble rolls off noticeably in the upper frequencies
- Con:No wireless or multipoint connectivity options
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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