Wired IEMs
Campfire Audio Alien Brain - Hybrid IEM
84Great
$1,000
Full review dataCampfire Audio Alien Brain - Hybrid IEM vs FiiO FA9: which should you buy?
On aggregated review scores the Campfire Audio Alien Brain - Hybrid IEM comes out ahead with an HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Campfire Audio Alien Brain - Hybrid IEM - Great overall at around $999.
Wired IEMs
FiiO FA9
72Good
$500
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Campfire Audio Alien Brain - Hybrid IEM
Sound8.5
Value7.5
FiiO FA9
Sound7.5
Value6.5
Specifications
| Spec | Campfire Audio Alien Brain - Hybrid IEM | FiiO FA9 |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $1,000 | $500 |
| HearWiki score | 84 / 100 · Great | 72 / 100 · Good |
| Released | 2024 | 2020 |
| Audio | ||
| Driver | hybrid | 6 balanced armature drivers (Knowles) |
| Driver size | 10 mm | - |
| Drivers per side | 5 | 6 |
| Frequency response | 5Hz-20kHz | 15Hz-40kHz |
| Impedance | 7.8 Ω | 16-32 @1KHz |
| Sensitivity | 94 dB/mW | 110 dB/mW |
| Battery | ||
| Wireless charging | - | No |
| Features | ||
| ANC type | - | none |
| Transparency mode | - | No |
| Companion app | - | No |
| Custom EQ | - | No |
| Wear detection | - | No |
| Controls | - | none |
| Design | ||
| Weight | - | 6.2 g |
| Water resistance | - | none |
| Foldable | - | No |
| Detachable cable | - | Yes |
| USB-C | Yes | No |
What reviewers said
Campfire Audio Alien Brain - Hybrid IEM
The Campfire Audio Alien Brain is a five-driver hybrid IEM that pairs a dynamic driver with four balanced armatures for a warm, engaging, and highly detailed sound. Its tuning is cohesive and broadly appealing, offering controlled bass, natural mids, and smooth treble, all within a compact, ergonomic shell that's easy to drive. This premium set stands out for its fun yet balanced character, making it a versatile choice for a wide range of listeners.
- Pro:Detailed and controlled bass response
- Pro:Warm, engaging, and musical tuning
- Pro:Compact and ergonomic design
- Con:Low impedance may require a good source
- Con:Sensitivity is on the lower side
- Con:Price point is premium
FiiO FA9
The FiiO FA9 is a flagship six-driver balanced-armature in-ear monitor that prioritizes tuning flexibility through its switchable sound profiles and a robust, 3D-printed shell. It delivers a warm, bass-rich signature with airy treble, and while it excels in build quality and source compatibility, its physical size and complex tuning options may not suit everyone. Overall, it's a well-engineered enthusiast tool that offers solid technical performance for its price, though it doesn't dominate every sonic category.
- Pro:Excellent build quality with a comfortable, lightweight fit for most ears
- Pro:Multiple tuning switches allow for significant sound signature adjustments
- Pro:Strong bass extension and smooth, non-fatiguing treble
- Con:Large shell may cause fit issues for smaller ears
- Con:Tuning options can be overwhelming or confusing to dial in
- Con:Instrument separation is only average for the price
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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