Juzear x Z Reviews Defiant 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 3 of 4 measures.

Juzear x Z Reviews Defiant
Letshuoer S12 Ultra

HearWiki score

Sound

7.9

8.6

Value

8.8

8.9

Price (USD)

$100

$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

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.

x Z Reviews Defiant2025
S12 Ultra2025

Specifications

x Z Reviews DefiantS12 Ultra

Type: Wired IEMs; Wired IEMs
Price (USD): $100; $170
HearWiki score: 79; 83
Released: 2025; 2025
Availability: Sold new; Sold new
Driver: 1DD + 3BA hybrid; 1 planar magnetic
Driver type: hybrid; planar
Driver configuration: 1DD + 3BA; 1 planar magnetic
Driver size: 10 mm; 14.8 mm
Drivers per side: 4; 1
Impedance: 32 Ω; 16 Ω
Weight: 6.1 g; -
Detachable cable: Yes; -
Connector: 2-pin 0.78 mm; -

Specification comparison of Juzear x Z Reviews Defiant vs Letshuoer S12 Ultra
Spec	Juzear x Z Reviews Defiant	Letshuoer S12 Ultra
Type	Wired IEMs	Wired IEMs
Price (USD)	$100	$170
HearWiki score	79 / 100 Great	83 / 100 Outstanding
Released	2025	2025
Audio
Driver	1DD + 3BA hybrid	1 planar magnetic
Driver type	hybrid	planar
Driver configuration	1DD + 3BA	1 planar magnetic
Driver size	10 mm	14.8 mm
Drivers per side	4	1
Impedance	32 Ω	16 Ω
Design
Weight	6.1 g	-
Detachable cable	Yes	-
Connector	2-pin 0.78 mm	-

What reviewers said

Juzear x Z Reviews Defiant

The Defiant is a hybrid in-ear monitor that pairs a single dynamic driver with three balanced armatures to deliver a lively, energetic sound profile that belies its modest price point. It offers a robust feature set, including a detachable cable and lightweight build, making it a compelling pick for budget-conscious listeners who prioritize fun and engaging audio. Overall, it stands out as a strong value proposition around the $100 mark, with tuning and accessories that punch above their weight.

Pro:Energetic and engaging tuning for the price
Pro:Hybrid driver array offers good detail separation
Pro:Lightweight and comfortable build

Con:No noise cancellation for those seeking isolation
Con:Bass may be too forward for neutral purists
Con:Stock cable could feel basic to some users

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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New comparison Juzear x Z Reviews Defiant Letshuoer S12 Ultra