7HZ TIMELESS AE 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

Score 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.

7HZ TIMELESS AE
Letshuoer S12 Ultra

HearWiki score

Sound

7.7

8.6

Value

5.6

8.9

Price (USD)

$260

$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.

TIMELESS AE2022
S12 Ultra20253 yr newer

Specifications

TIMELESS AES12 Ultra

Type: Wired IEMs; Wired IEMs
Price (USD): $260; $170
HearWiki score: 66; 83
Released: 2022; 2025
Availability: Discontinued; Sold new
Driver: 1 planar; 1 planar magnetic
Driver type: planar; planar
Driver configuration: 1 planar; 1 planar magnetic
Driver size: 14.2 mm; 14.8 mm
Drivers per side: 1; 1
Impedance: 14.8 Ω; 16 Ω
Weight: 5 g; -
Detachable cable: Yes; -
Connector: 2-pin 0.78 mm; -

Specification comparison of 7HZ TIMELESS AE vs Letshuoer S12 Ultra
Spec	7HZ TIMELESS AE	Letshuoer S12 Ultra
Type	Wired IEMs	Wired IEMs
Price (USD)	$260	$170
HearWiki score	66 / 100 Good	83 / 100 Outstanding
Released	2022	2025
Audio
Driver	1 planar	1 planar magnetic
Driver type	planar	planar
Driver configuration	1 planar	1 planar magnetic
Driver size	14.2 mm	14.8 mm
Drivers per side	1	1
Impedance	14.8 Ω	16 Ω
Design
Weight	5 g	-
Detachable cable	Yes	-
Connector	2-pin 0.78 mm	-

What reviewers said

7HZ TIMELESS AE

This wired in-ear monitor uses a single 14.2 mm planar magnetic driver to deliver detailed, high-fidelity sound for home or work listening. It's a refined version of the original Timeless, with a detachable 2-pin cable and a lightweight build for comfort. Lacks active noise cancellation, focusing instead on pure audio performance.

Pro:Detailed and accurate planar sound signature
Pro:Lightweight and comfortable for long sessions
Pro:Detachable 2-pin cable for easy replacement or upgrades

Con:No noise cancellation, so external sounds leak in
Con:Requires a decent source to drive properly due to low impedance
Con:Cable may pick up microphonics if not worn over-ear

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

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

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