Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs Sennheiser IE 300: 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
Sennheiser IE 300
66Good
$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
- Sennheiser IE 300
HearWiki score
83
66
Sound
8.6
7.6
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 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
- IE 3002021
Specifications
S12 UltraIE 300
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $150
- HearWiki score
- 83
- 66
- Released
- 2025
- 2021
- Availability
- Sold new
- Discontinued
- Driver
- 1 planar magnetic
- 7 mm dynamic
- Driver type
- planar
- dynamic
- Driver configuration
- 1 planar magnetic
- -
- Driver size
- 14.8 mm
- 7 mm
- Drivers per side
- 1
- 1
- Frequency response
- -
- 6 Hz - 20 kHz
- Sound signature
- -
- neutral-warm
- Impedance
- 16 Ω
- 16 Ω
- Sensitivity
- -
- 106 dB/mW
- Active noise cancelling
- -
- No
- Controls
- -
- none
- Weight
- -
- 4 g
- Detachable cable
- -
- Yes
- Connector
- -
- 3.5 mm
- Model code
- -
- 509104
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
Sennheiser IE 300
The Sennheiser IE 300 is a wired single-dynamic-driver IEM offering a neutral-warm signature with impressive technical performance for its price. It combines a durable, lightweight build with comfortable ergonomics, delivering detailed mids, solid bass, and good soundstage separation. While it lacks top-tier subtlety and rhythmic agility, it remains a strong, well-rounded choice for audiophiles on a budget.
- Pro:Comfortable, lightweight, and well-built
- Pro:Detailed and lush midrange with good bass depth
- Pro:Solid soundstage and instrument separation
- Con:Not the most subtle or dynamic performer at the top level
- Con:No inline controls or microphone
- Con:Lacks some rhythmic precision for critical listeners
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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