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Campfire Audio Axion vs Kiwi Ears KE4: which should you buy?

On aggregated review scores the Kiwi Ears KE4 comes out ahead with a HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Kiwi Ears KE4 - Outstanding overall at around $199.

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

Kiwi Ears KE4 leads on 4 of 5 measures.

  • Campfire Audio Axion
  • Kiwi Ears KE4
HearWiki score
66
84
Sound
6.9
8.6
Calls
6.0
-
Value
6.4
8.6
Price (USD)
$250
$200

Generation & platform

The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?

Same generation

Campfire Audio Axion (2025) against Kiwi Ears KE4 (2024). These are the same generation of hardware - nothing in the radio, the codecs or the noise cancelling separates them. Nothing separates them on convenience features either, so the choice comes down to tuning and price.

  • Axion20251 yr newer
  • KE42024

Specifications

AxionKE4
Type
Wired IEMs
Wired IEMs
Price (USD)
$250
$200
HearWiki score
66
84
Released
2025
2024
Availability
Sold new
Still sold new
Driver
dynamic
2DD + 2BA hybrid
Driver type
dynamic
hybrid
Driver configuration
-
2DD + 2BA
Driver size
-
10 mm
Drivers per side
1
4
Frequency response
5 Hz - 20 kHz
-
Sound signature
neutral
-
Impedance
15.3 Ω
28 Ω
Active noise cancelling
No
No
ANC type
none
-
Transparency mode
No
-
Companion app
No
-
Custom EQ
No
-
Wear detection
No
-
Controls
buttons
-
Foldable
No
-
Detachable cable
Yes
Yes
USB-C
Yes
-
Connector
USB-C
3.5 mm
Microphones
1
-

What reviewers said

Campfire Audio Axion

The Campfire Audio Axion is a wired USB-C in-ear monitor that pairs a single dynamic driver with a built-in DAC, delivering a balanced and immersive sound with punchy bass and a natural midrange. Its lightweight, comfortable shells and practical design make it a solid everyday option, though it lacks advanced features like ANC, app support, and custom EQ. Overall, it offers a convenient, modern listening experience with good imaging and build quality, but its resolution and treble extension have some limitations.

  • Pro:Punchy, well-defined bass
  • Pro:Natural and articulate midrange
  • Pro:Lightweight, comfortable shells
  • Con:Lower mids can sound congested
  • Con:Treble lacks crispness and extension
  • Con:Bass presence is limited

Kiwi Ears KE4

The Kiwi Ears KE4 is a wired hybrid IEM that offers a balanced, relaxing sound with a distinct twist on the popular 'New Meta' tuning, adding extra bass and treble sparkle. It delivers solid midrange clarity and a comfortable fit, making it a versatile choice for many genres, though its smooth presentation may not excite those seeking aggressive or highly dynamic sound.

  • Pro:Well-balanced hybrid tuning with rich lower mids and airy treble
  • Pro:Comfortable fit and broad genre versatility
  • Pro:Good resolution and clarity for its price
  • Con:Sub-bass can get overpowering at times
  • Con:Limited resolving power and dynamic impact
  • Con:Smooth tuning may feel less exciting than V-shaped alternatives

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

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New comparisonCampfire Audio AxionKiwi Ears KE4