FiiO JD7 vs Letshuoer S12 Ultra: which should you buy?

Specs, scores and condensed review verdicts for the FiiO JD7 vs Letshuoer S12 Ultra, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.

Wired IEMs

FiiO JD7

Not yet scored

$99

Full review data

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.

FiiO JD7
Letshuoer S12 Ultra

HearWiki score

Sound

8.6

Value

8.9

Price (USD)

$99

$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

Letshuoer S12 Ultra (2025) against FiiO JD7 (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.

JD72024
S12 Ultra20251 yr newer

Specifications

JD7S12 Ultra

Type: Wired IEMs; Wired IEMs
Price (USD): $99; $170
HearWiki score: Not scored; 83
Released: 2024; 2025
Availability: Discontinued; Sold new
Driver: 10 mm dynamic; 1 planar magnetic
Driver type: dynamic; planar
Driver configuration: -; 1 planar magnetic
Driver size: 10 mm; 14.8 mm
Drivers per side: 1; 1
Sound signature: harman; -
Impedance: 32 Ω; 16 Ω
Sensitivity: 108 dB/mW; -
Active noise cancelling: No; -
Controls: buttons; -
Weight: 8.3 g; -
Detachable cable: Yes; -
USB-C: No; -
Connector: MMCX; -

Specification comparison of FiiO JD7 vs Letshuoer S12 Ultra
Spec	FiiO JD7	Letshuoer S12 Ultra
Type	Wired IEMs	Wired IEMs
Price (USD)	$99	$170
HearWiki score	Not scored	83 / 100 Outstanding
Released	2024	2025
Audio
Driver	10 mm dynamic	1 planar magnetic
Driver type	dynamic	planar
Driver configuration	-	1 planar magnetic
Driver size	10 mm	14.8 mm
Drivers per side	1	1
Sound signature	harman	-
Impedance	32 Ω	16 Ω
Sensitivity	108 dB/mW	-
Features
Active noise cancelling	No	-
Controls	buttons	-
Design
Weight	8.3 g	-
Detachable cable	Yes	-
USB-C	No	-
Connector	MMCX	-

What reviewers said

FiiO JD7

The FiiO JD7 is a wired, semi-open in-ear monitor featuring a single 10mm dynamic driver housed in stainless steel, with a sound profile aimed at the Harman target. It comes with HS18 ear tips and a compact storage case, offering detachable MMCX cables for easy replacement or upgrades.

Pro:Harman-tuned sound signature
Pro:Detachable MMCX cable
Pro:Stainless steel build

Con:No active noise cancellation
Con:Wired only, no USB-C option
Con:Semi-open design may leak sound

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

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 FiiO JD7 Letshuoer S12 Ultra