FiiO FF3 vs Letshuoer S12 Ultra: which should you buy?

Specs, scores and condensed review verdicts for the FiiO FF3 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 FF3

Not yet scored

$100

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 FF3
Letshuoer S12 Ultra

HearWiki score

Sound

8.6

Value

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

Letshuoer S12 Ultra (2025) against FiiO FF3 (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.

FF32024
S12 Ultra20251 yr newer

Specifications

FF3S12 Ultra

Type: Wired IEMs; Wired IEMs
Price (USD): $100; $170
HearWiki score: Not scored; 83
Released: 2024; 2025
Availability: Discontinued; Sold new
Driver: 14.2 mm dynamic; 1 planar magnetic
Driver type: dynamic; planar
Driver configuration: -; 1 planar magnetic
Driver size: 14.2 mm; 14.8 mm
Drivers per side: 1; 1
Frequency response: 42.5 Hz - 17 kHz; -
Impedance: 45 Ω; 16 Ω
Sensitivity: 105 dB/mW; -
Active noise cancelling: No; -
Controls: buttons; -
Detachable cable: Yes; -
Connector: 4.4 mm balanced; -

Specification comparison of FiiO FF3 vs Letshuoer S12 Ultra
Spec	FiiO FF3	Letshuoer S12 Ultra
Type	Wired IEMs	Wired IEMs
Price (USD)	$100	$170
HearWiki score	Not scored	83 / 100 Outstanding
Released	2024	2025
Audio
Driver	14.2 mm dynamic	1 planar magnetic
Driver type	dynamic	planar
Driver configuration	-	1 planar magnetic
Driver size	14.2 mm	14.8 mm
Drivers per side	1	1
Frequency response	42.5 Hz - 17 kHz	-
Impedance	45 Ω	16 Ω
Sensitivity	105 dB/mW	-
Features
Active noise cancelling	No	-
Controls	buttons	-
Design
Detachable cable	Yes	-
Connector	4.4 mm balanced	-

What reviewers said

FiiO FF3

The FiiO FF3 is a wired in-ear monitor that pairs a 14.2mm dynamic driver with a polished stainless steel shell for a sturdy, premium feel. It features a bass-enhancing acoustic chamber and interchangeable plugs, while the detachable silver-plated copper cable adds flexibility for audiophile setups. With a balanced 4.4mm connection and no active noise cancellation, it targets listeners who prioritize pure, wired sound.

Pro:Sturdy stainless steel build
Pro:Bass-enhancing acoustic design
Pro:Detachable cable with balanced option

Con:Limited frequency response range
Con:No noise cancellation
Con:Requires a balanced source for full potential

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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