Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs TRN X7: 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.
Wired IEMs
TRN X7
25Weak
$130
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
- TRN X7
HearWiki score
83
25
Sound
8.6
4.6
Value
8.9
-
Price (USD)
$170
$130
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
- X72018
Specifications
S12 UltraX7
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $130
- HearWiki score
- 83
- 25
- Released
- 2025
- 2018
- Availability
- Sold new
- Discontinued
- Driver
- 1 planar magnetic
- 7× balanced armature
- Driver type
- planar
- balanced-armature
- Driver configuration
- 1 planar magnetic
- -
- Driver size
- 14.8 mm
- -
- Drivers per side
- 1
- 7
- Frequency response
- -
- 20 Hz - 40 kHz
- Impedance
- 16 Ω
- 20 Ω
- Sensitivity
- -
- 102 dB/mW
- Active noise cancelling
- -
- No
- Weight
- -
- 12 g
- Connector
- -
- 3.5 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
TRN X7
The TRN X7 is a wired in-ear monitor built around seven balanced-armature drivers, offering a wide frequency range and a lightweight, replaceable-cable design with a standard 3.5 mm plug. Its tuning leans toward a bright, detailed treble that can occasionally come across as sharp, while the bass and midrange deliver solid performance for the price. It's a good pick for listeners curious about multi-BA setups, though its sound may not suit everyone's taste.
- Pro:Excellent build and fit quality
- Pro:Strong bass and midrange performance
- Pro:Lightweight at only 12 g
- Con:Treble can be sharp or piercing at times
- Con:Not an all-around standout for all genres
- Con:Requires a capable source due to 20 ohm impedance
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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