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Final A4000 vs Letshuoer S12 Ultra: which should you buy?

On aggregated review scores the Letshuoer S12 Ultra comes out ahead with a HearWiki score of 83. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Letshuoer S12 Ultra - Outstanding overall at around $169.

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.

  • Final A4000
  • Letshuoer S12 Ultra
HearWiki score
65
83
Sound
7.1
8.6
Value
6.8
8.9
Price (USD)
$160
$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

The Letshuoer S12 Ultra is 5 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 5 years between them, that is a thin return - treat this as a restyle rather than a new platform.

  • A40002020
  • S12 Ultra20255 yr newer

Specifications

A4000S12 Ultra
Type
Wired IEMs
Wired IEMs
Price (USD)
$160
$170
HearWiki score
65
83
Released
2020
2025
Availability
Still sold new
Sold new
Driver
6 mm dynamic
1 planar magnetic
Driver type
dynamic
planar
Driver configuration
-
1 planar magnetic
Driver size
6 mm
14.8 mm
Drivers per side
1
1
Impedance
18 Ω
16 Ω
Sensitivity
100 dB/mW
-
Active noise cancelling
No
-
ANC type
none
-
Transparency mode
No
-
Companion app
No
-
Custom EQ
No
-
Wear detection
No
-
Voice assistant
No
-
Weight
18 g
-
USB-C
No
-
Connector
2-pin 0.78 mm
-
Model code
FI-A4DPLDN
-
Call noise reduction
No
-

What reviewers said

Final A4000

The Final A4000 is a wired, single-dynamic-driver IEM designed for portable use, delivering an open, spacious sound with crisp mids and airy treble. Its easy 18-ohm impedance makes it a hassle-free match for phones and dongles, though its bright tuning can expose sibilance or harshness in some tracks. It's a technically capable earphone that rewards listeners who value clarity and soundstage over a warm, forgiving signature.

  • Pro:Excellent soundstage and imaging for the price
  • Pro:Fast transient response and strong separation
  • Pro:Easy to drive from any phone or portable source
  • Con:Bright tuning can turn sibilant on certain recordings
  • Con:Upper-midrange harshness may fatigue sensitive ears
  • Con:No accessories or app support beyond the cable

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.

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