Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs SeeAudio Yume: 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
SeeAudio Yume
60Average
$170
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
- SeeAudio Yume
HearWiki score
83
60
Sound
8.6
7.3
Value
8.9
5.8
Price (USD)
$170
$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 4 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 4 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- S12 Ultra20254 yr newer
- Yume2021
Specifications
S12 UltraYume
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $170
- HearWiki score
- 83
- 60
- Released
- 2025
- 2021
- Availability
- Sold new
- Discontinued
- Driver
- 1 planar magnetic
- 1DD + 2BA hybrid
- Driver type
- planar
- hybrid
- Driver configuration
- 1 planar magnetic
- 1DD + 2BA
- Driver size
- 14.8 mm
- -
- Drivers per side
- 1
- 3
- Impedance
- 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 built around a single 14.8mm planar magnetic driver housed in a lightweight aluminum shell. It delivers the signature planar sound of the S12 line—fast, detailed, and punchy—in a refreshed design aimed at hi-fi enthusiasts. With a low 16-ohm impedance, it pairs easily with most sources, though it lacks any active noise cancellation.
- Pro:Fast, detailed planar sound with strong dynamics
- Pro:Lightweight and sturdy aluminum-alloy build
- Pro:Easy to drive thanks to low impedance
- Con:No noise cancellation or isolation features
- Con:Planar timbre may not suit all listeners
- Con:Cable and accessories are basic for the price
SeeAudio Yume
The SeeAudio Yume is a wired hybrid IEM with a single dynamic driver and two balanced armatures, tuned to the Harman curve by acoustic engineers. Its standout feature is its refined, natural tonality that excels with vocals and overall balance, making it a strong choice for listeners who prioritize tuning over raw technicalities. However, its resolution, imaging, and soundstage are only average, with a slightly weak sub-bass extension, so it won't impress those seeking maximum detail retrieval.
- Pro:Excellent, natural tonality with balanced tuning
- Pro:Clear and engaging midrange, especially for vocals
- Pro:Comfortable fit with good timbre
- Con:Average resolution and detail retrieval
- Con:Limited soundstage and vague imaging
- Con:Sub-bass extension is somewhat weak
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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