Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs Punch Audio Martilo: 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
Punch Audio Martilo
75Great
$330
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Letshuoer S12 Ultra leads on 4 of 4 measures.
- Letshuoer S12 Ultra
- Punch Audio Martilo
HearWiki score
83
75
Sound
8.6
8.0
Value
8.9
7.3
Price (USD)
$170
$330
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
Both shipped in 2025. These are 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.
- S12 Ultra2025
- Martilo2025
Specifications
S12 UltraMartilo
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $330
- HearWiki score
- 83
- 75
- Released
- 2025
- 2025
- Availability
- Sold new
- Sold new
- Driver
- 1 planar magnetic
- 2DD + 2BA + 1PL tribrid
- Driver type
- planar
- tribrid
- Driver configuration
- 1 planar magnetic
- 2DD + 2BA + 1PL
- Driver size
- 14.8 mm
- 8 mm
- Drivers per side
- 1
- 5
- Impedance
- 16 Ω
- 9 Ω
- Detachable cable
- -
- Yes
- 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
Punch Audio Martilo
The Punch Audio Martilo is a wired tribrid IEM that leans into a bass-forward sound while keeping things controlled and coherent rather than messy. It offers a wide, spacious presentation with solid separation and a smooth treble, making it easy to wear for long sessions. Its main trade-off is a slightly recessed midrange that can feel hollow on acoustic or live tracks.
- Pro:Controlled, punchy bass without bloat
- Pro:Wide soundstage with clear instrument separation
- Pro:Smooth treble and comfortable long-term fit
- Con:Mids can sound recessed or hollow at times
- Con:Not ideal for acoustic or live recordings
- Con:Low 9-ohm impedance may need a good source
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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