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FiiO FF3S vs Letshuoer S12 Ultra: which should you buy?

Specs, scores and condensed review verdicts for the FiiO FF3S 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.

  • FiiO FF3S
  • Letshuoer S12 Ultra
HearWiki score
-
83
Sound
-
8.6
Value
-
8.9
Price (USD)
$90
$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

Letshuoer S12 Ultra (2025) against FiiO FF3S (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.

  • FF3S2024
  • S12 Ultra20251 yr newer

Specifications

FF3SS12 Ultra
Type
Wired IEMs
Wired IEMs
Price (USD)
$90
$170
HearWiki score
Not scored
83
Released
2024
2025
Availability
Discontinued
Sold new
Driver
14.2 mm dynamic
1 planar magnetic
Driver type
dynamic
planar
Driver configuration
-
1 planar magnetic
Driver size
14.2 mm
14.8 mm
Drivers per side
1
1
Frequency response
20 Hz - 20 kHz
-
Sound signature
warm
-
Impedance
45 Ω
16 Ω
Sensitivity
105 dB/mW
-
Active noise cancelling
No
-
Controls
buttons
-
Weight
3.9 g
-
Detachable cable
Yes
-
USB-C
No
-
Connector
2-pin 0.78 mm
-
Balanced connection
Yes
-

What reviewers said

FiiO FF3S

The FiiO FF3S are wired, detachable-cable earbuds with a warm sound signature, built around a 14.2mm dynamic driver with a beryllium-plated dome and PU gasket diaphragm. They feature an aluminum alloy shell, a dual-cavity bass design for enhanced low-end, and come with a high-purity silver-plated monocrystalline copper cable with swappable 3.5mm and 4.4mm plugs. These lightweight earbuds offer a comfortable fit and balanced output via a 2-pin connector, making them a versatile option for listeners seeking a rich, bass-forward presentation without active noise cancellation.

  • Pro:Warm, bass-forward sound with dual-cavity design
  • Pro:Detachable cable with swappable 3.5/4.4mm plugs
  • Pro:Lightweight aluminum alloy build (3.9g)
  • Con:No active noise cancellation
  • Con:Wired only, no USB-C option
  • Con:On-cable buttons may be less convenient than inline controls

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

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New comparisonFiiO FF3SLetshuoer S12 Ultra