Wired IEMs
Letshuoer S12 Ultra
83Outstanding
$170
Full review dataLetshuoer S12 Ultra vs NF ACOUS NA2+: 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
NF ACOUS NA2+
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
- NF ACOUS NA2+
HearWiki score
83
60
Sound
8.6
7.0
Value
8.9
6.4
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
- NA2+2021
Specifications
S12 UltraNA2+
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $170
- $170
- HearWiki score
- 83
- 60
- Released
- 2025
- 2021
- Availability
- Sold new
- Discontinued
- Driver
- 1 planar magnetic
- dynamic
- Driver type
- planar
- dynamic
- Driver configuration
- 1 planar magnetic
- -
- Driver size
- 14.8 mm
- -
- Drivers per side
- 1
- -
- Impedance
- 16 Ω
- 32 Ω
- Sensitivity
- -
- 107 dB/mW
- 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
NF ACOUS NA2+
The NF Audio NA2+ is a wired dynamic IEM that delivers crisp detail and precise imaging with a bright-neutral signature. It shines for treble-focused genres like rock and metal, offering clean bass and transparent mids, but its top-end emphasis makes it less ideal for those seeking a warm, all-around tuning. Priced around $169, it remains a technically capable choice for listeners prioritizing clarity and soundstage over a forgiving sound.
- Pro:Excellent detail retrieval and imaging
- Pro:Clean, transparent mids and solid bass
- Pro:Wide soundstage for an IEM at this price
- Con:Bright treble can be sibilant or metallic
- Con:Not a balanced all-rounder; leans bright
- Con:Fit may be loose for some users
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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