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Kiwi Ears Stardust vs Letshuoer S12 Ultra: which should you buy?

Specs, scores and condensed review verdicts for the Kiwi Ears Stardust vs Letshuoer S12 Ultra, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.

Score breakdown

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

Letshuoer S12 Ultra leads on 3 of 4 measures.

  • Kiwi Ears Stardust
  • Letshuoer S12 Ultra
HearWiki score
-
83
Sound
-
8.6
Value
-
8.9
Price (USD)
$130
$170

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

Both shipped in 2025. 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.

  • Stardust2025
  • S12 Ultra2025

Specifications

StardustS12 Ultra
Type
Wired IEMs
Wired IEMs
Price (USD)
$130
$170
HearWiki score
Not scored
83
Released
2025
2025
Availability
Sold new
Sold new
Driver
1DD + 4BA hybrid
1 planar magnetic
Driver type
hybrid
planar
Driver configuration
1DD + 4BA
1 planar magnetic
Driver size
10 mm
14.8 mm
Drivers per side
5
1
Frequency response
20 Hz - 40 kHz
-
Sound signature
neutral-warm
-
Impedance
13 Ω
16 Ω
Detachable cable
Yes
-
Connector
2-pin 0.78 mm
-

What reviewers said

Kiwi Ears Stardust

The Kiwi Ears Stardust is a wired hybrid in-ear monitor that pairs a single 10mm dynamic driver with four balanced armature drivers for a detailed, immersive sound. With a neutral-warm tuning and a low 13-ohm impedance, it's easy to drive from most sources, making it a versatile choice for critical listening. Its detachable 2-pin cable adds convenience and upgrade potential.

  • Pro:Detailed hybrid driver configuration
  • Pro:Neutral-warm sound signature
  • Pro:Low impedance for easy driving
  • Con:No active noise cancellation
  • Con:Requires a wired source
  • Con:May need amplification for optimal performance

Letshuoer S12 Ultra

The Letshuoer S12 Ultra is a wired in-ear monitor that delivers Hi-Fi sound through a single 14.8mm planar magnetic driver housed in a lightweight aluminum-alloy shell. Aimed at music enthusiasts, it offers the signature planar-driver clarity and detail of the S12 series in a refreshed design, without any active noise cancellation or wireless features. Priced around $169, it's a straightforward, high-performance option for wired listening.

  • Pro:Detailed and fast planar magnetic sound
  • Pro:Lightweight and durable aluminum-alloy build
  • Pro:Accurate bass response with low distortion
  • Con:Requires a wired connection, no wireless freedom
  • Con:No active noise cancellation for noisy environments
  • Con:Open-back style may leak sound in quiet settings

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.

New comparisonKiwi Ears StardustLetshuoer S12 Ultra