Wired IEMs
Campfire Audio Alien Brain - Hybrid IEM
84Great
$999
Full review dataCampfire Audio Alien Brain - Hybrid IEM vs Etymotic ER4XR Earphones: 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
Etymotic ER4XR Earphones
78Great
$299
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
Etymotic ER4XR Earphones
Sound8.0
Value7.0
Specifications
| Spec | Campfire Audio Alien Brain - Hybrid IEM | Etymotic ER4XR Earphones |
|---|---|---|
| Type | Wired IEMs | Wired IEMs |
| Price (USD) | $999 | $299 |
| HearWiki score | 84 / 100 · Great | 78 / 100 · Great |
| Released | 2024 | 2016 |
| Audio | ||
| Driver | hybrid | Balanced Armature (BA) |
| Driver size | 10 mm | - |
| Drivers per side | 5 | 1 |
| Frequency response | 5Hz-20kHz | 20Hz-16kHz |
| Impedance | 7.8 Ω | 45 Ω |
| Sensitivity | 94 dB/mW | 98 dB/mW |
| Wireless | ||
| Multipoint pairing | - | No |
| Battery | ||
| Wireless charging | - | No |
| Features | ||
| Active noise cancelling | - | No |
| ANC type | - | none |
| Transparency mode | - | No |
| Companion app | - | No |
| Custom EQ | - | No |
| Wear detection | - | No |
| Controls | - | none |
| Design | ||
| 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
Etymotic ER4XR Earphones
The Etymotic ER4XR is a compact, wired in-ear monitor built around a single balanced-armature driver, delivering a detailed and analytical sound signature with crisp mids and highs. Its deep-insertion design provides excellent passive noise isolation and a secure fit, though the unusual fit and lack of onboard controls make it better suited for professionals or critical listeners than casual users. With a detachable cable and replaceable filters, it's a durable, portable choice for travel or office use, though the bass response is lean and the feature set is minimal.
- Pro:Exceptional mid and treble detail
- Pro:Superb passive noise isolation
- Pro:Compact, durable, and highly portable
- Con:Deep insertion fit may be uncomfortable
- Con:Bass-light tuning not for bass lovers
- Con:No inline remote or controls
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
Compare something else
Swap either side out, or start again from the picker.