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64 Audio U4S vs Campfire Audio Andromeda 2020: which should you buy?

On aggregated review scores the Campfire Audio Andromeda 2020 comes out ahead with a HearWiki score of 80. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Campfire Audio Andromeda 2020 - Great overall at around $835.

Score breakdown

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

Campfire Audio Andromeda 2020 leads on 3 of 4 measures.

  • 64 Audio U4S
  • Campfire Audio Andromeda 2020
HearWiki score
76
80
Sound
8.5
9.0
Value
7.5
6.5
Price (USD)
$1,100
$830

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

The 64 Audio U4S is 3 years newer, but it is 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. For 3 years between them, that is a thin return - treat this as a restyle rather than a new platform.

  • U4S20233 yr newer
  • Andromeda 20202020

Specifications

U4SAndromeda 2020
Type
Wired IEMs
Wired IEMs
Price (USD)
$1,100
$830
HearWiki score
76
80
Released
2023
2020
Availability
Discontinued
Discontinued
Driver
1DD + 3BA hybrid
5× balanced armature
Driver type
hybrid
balanced-armature
Driver configuration
1DD + 3BA
-
Drivers per side
4
5
Frequency response
-
5 Hz - 20 kHz
Impedance
11 Ω
6.4 Ω
Sensitivity
107 dB/mW
123 dB/mW
Sensitivity (dB/Vrms)
-
94
Active noise cancelling
No
No
Controls
-
none
Detachable cable
-
Yes
USB-C
-
No
Connector
-
MMCX
Model code
-
Andromeda Emerald Sea

What reviewers said

64 Audio U4S

The 64 Audio U4S is a hybrid universal IEM that blends a dynamic driver with three balanced armatures to deliver a well-rounded, musical sound signature. It offers punchy, well-defined bass, smooth mids, and crisp treble, making it a versatile and easy-to-drive choice for a wide range of genres. While its tuning leans toward enjoyment rather than pure neutrality, it maintains solid technical performance with good detail retrieval and soundstage for its price point.

  • Pro:Energetic and well-extended bass response
  • Pro:Smooth, natural midrange with good vocal presence
  • Pro:Easy to drive thanks to high sensitivity and low impedance
  • Con:Lower mids can sound slightly recessed to some ears
  • Con:Lacks active noise cancellation for noisy environments
  • Con:Price point may be high for those seeking a strictly neutral sound

Campfire Audio Andromeda 2020

The Campfire Audio Andromeda 2020 is a premium five-driver balanced armature IEM that refines the original's signature with smoother, more coherent mids and improved treble. It delivers an expansive soundstage with excellent imaging and layering, though its low impedance and high sensitivity mean it demands a quality source to shine. A worthwhile update for both newcomers and existing fans, it excels in clarity and detail but has some limitations in bass texture.

  • Pro:Cohesive and smooth midrange
  • Pro:Excellent soundstage and imaging
  • Pro:Strong, detailed treble
  • Con:Requires a high-quality source
  • Con:Limited bass texture and weight
  • Con:No controls or ANC

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

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