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Letshuoer S12 Ultra vs Soundcore Sleep A20: 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.

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

Letshuoer S12 Ultra leads on 3 of 5 measures.

  • Letshuoer S12 Ultra
  • Soundcore Sleep A20
HearWiki score
83
64
Sound
8.6
5.1
Battery
-
9.0
Value
8.9
6.8
Price (USD)
$170
$100

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

Letshuoer S12 Ultra (2025) against Soundcore Sleep A20 (2024). 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 Ultra20251 yr newer
  • Sleep A202024

Specifications

S12 UltraSleep A20
Type
Wired IEMs
Wired IEMs
Price (USD)
$170
$100
HearWiki score
83
64
Released
2025
2024
Availability
Sold new
Still sold new
Driver
1 planar magnetic
4.7 mm dynamic
Driver type
planar
dynamic
Driver configuration
1 planar magnetic
-
Driver size
14.8 mm
4.7 mm
Drivers per side
1
1
Frequency response
-
20 Hz - 20 kHz
Sound signature
-
neutral
Impedance
16 Ω
16 Ω
Bluetooth
-
5.3
Codecs
-
SBC, AAC
Multipoint pairing
-
No
Wireless range
-
10 m
Battery life
-
10 h
Battery incl. case
-
80 h
Full charge time
-
90 min
Quick charge
-
none
Wireless charging
-
No
Active noise cancelling
-
No
ANC type
-
none
Transparency mode
-
No
Companion app
-
Yes
Custom EQ
-
Yes
Wear detection
-
Yes
Controls
-
touch
Weight
-
3.1 g
Water resistance
-
IPX4
USB-C
-
Yes

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

Soundcore Sleep A20

The Soundcore Sleep A20 are ultra-compact wireless earbuds designed specifically for overnight use, relying on a snug, earplug-like fit and built-in masking sounds to block disturbances instead of active noise cancellation. They prioritize comfort for side sleepers, offer sleep tracking through the companion app, and provide a practical battery life that supports multiple nights of listening. While they are not meant for critical music listening, their specialized design makes them a solid choice for improving sleep in noisy environments.

  • Pro:Comfortable, low-profile design suitable for side sleepers
  • Pro:Strong passive isolation with noise-masking features
  • Pro:Long battery life with the charging case for multi-night use
  • Con:No active noise cancellation or transparency mode
  • Con:Limited sound quality for music enjoyment
  • Con:No multipoint connectivity for switching devices

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

Compare something else

Swap either side out, or start again from the picker.

New comparisonLetshuoer S12 UltraSoundcore Sleep A20