Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs TFZ FORCE KING: which should you buy?
Specs, scores and condensed review verdicts for the Letshuoer S12 Ultra vs TFZ FORCE KING, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.
Wired IEMs
TFZ FORCE KING
Not yet scored
$150
Full review dataScore 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.
- Letshuoer S12 Ultra
- TFZ FORCE KING
HearWiki score
83
-
Sound
8.6
-
Value
8.9
-
Price (USD)
$170
$150
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 7 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 7 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- S12 Ultra20257 yr newer
- FORCE KING2018
Specifications
S12 UltraFORCE KING
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $150
- HearWiki score
- 83
- Not scored
- Released
- 2025
- 2018
- Availability
- Sold new
- Discontinued
- Driver
- 1 planar magnetic
- 11.4 mm dynamic
- Driver type
- planar
- dynamic
- Driver configuration
- 1 planar magnetic
- -
- Driver size
- 14.8 mm
- 11.4 mm
- Drivers per side
- 1
- 1
- Frequency response
- -
- 20 Hz - 40 kHz
- Impedance
- 16 Ω
- 16 Ω
- Active noise cancelling
- -
- No
- Connector
- -
- 2-pin 0.78 mm
What reviewers said
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
TFZ FORCE KING
The TFZ FORCE KING is a wired in-ear monitor built around a single 11.4mm dynamic driver, designed for high-resolution audio playback. It offers a wide frequency range from 20Hz to 40kHz, and connects via a standard 2-pin 0.78mm connector, making it a straightforward choice for audiophiles seeking a detailed, non-ANC listening experience.
- Pro:Wide frequency response for detailed highs and lows
- Pro:Efficient 16-ohm impedance, easy to drive
- Pro:Standard 2-pin connector allows cable swapping
- Con:No active noise cancellation
- Con:Wired only, no wireless option
- Con:Single driver may lack some separation compared to hybrids
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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