Wired IEMs
Hidizs MD4
60Average
$140
Full review dataHidizs MD4 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.
Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$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.
- Hidizs MD4
- Letshuoer S12 Ultra
HearWiki score
60
83
Sound
6.9
8.6
Value
5.9
8.9
Price (USD)
$140
$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 3 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 3 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- MD42022
- S12 Ultra20253 yr newer
Specifications
MD4S12 Ultra
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $140
- $170
- HearWiki score
- 60
- 83
- Released
- 2022
- 2025
- Availability
- Discontinued
- Sold new
- Driver
- 4× balanced armature
- 1 planar magnetic
- Driver type
- balanced-armature
- planar
- Driver configuration
- -
- 1 planar magnetic
- Driver size
- -
- 14.8 mm
- Drivers per side
- 4
- 1
- Frequency response
- 20 Hz - 40 kHz
- -
- Impedance
- 8 Ω
- 16 Ω
- Sensitivity
- 102 dB/mW
- -
- Active noise cancelling
- No
- -
- Controls
- both
- -
- Weight
- 14 g
- -
- Detachable cable
- Yes
- -
- USB-C
- No
- -
- Connector
- 2-pin 0.78 mm
- -
What reviewers said
Hidizs MD4
The Hidizs MD4 is a compact, lightweight four-driver balanced-armature IEM that offers impressive detail and texture for its price. Its standout feature is dual tuning switches providing four sound modes, giving users flexibility to tailor the sound signature. With a low 8-ohm impedance and high sensitivity, it is easy to drive from most sources, making it a versatile and accessible option for those seeking a technical yet tunable listening experience.
- Pro:Excellent detail retrieval and texture for the price
- Pro:Four switchable tuning modes for flexibility
- Pro:Compact and lightweight build
- Con:Occasional nasal timbre on some female vocals
- Con:Potential channel imbalance if switches are not set consistently
- Con:No included active noise cancellation
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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