EPZ K9 vs Yu9 Audio Que: which should you buy?

On aggregated review scores the Yu9 Audio Que comes out ahead with a HearWiki score of 83. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Yu9 Audio Que - Great overall at around $399.

Wired IEMs

Score breakdown

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

Yu9 Audio Que leads on 3 of 4 measures.

EPZ K9
Yu9 Audio Que

HearWiki score

Sound

8.0

8.5

Value

7.5

8.0

Price (USD)

$350

$400

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.

K92025
Que2025

Specifications

K9Que

Type: Wired IEMs; Wired IEMs
Price (USD): $350; $400
HearWiki score: 74; 83
Released: 2025; 2025
Availability: Sold new; Sold new
Driver: 1DD + 8BA hybrid; 1DD + 3BA hybrid
Driver type: hybrid; hybrid
Driver configuration: 1DD + 8BA; 1DD + 3BA
Driver size: 8 mm; 10 mm
Drivers per side: 9; 4
Active noise cancelling: No; -
Connector: 2-pin 0.78 mm; -

Specification comparison of EPZ K9 vs Yu9 Audio Que
Spec	EPZ K9	Yu9 Audio Que
Type	Wired IEMs	Wired IEMs
Price (USD)	$350	$400
HearWiki score	74 / 100 Good	83 / 100 Great
Released	2025	2025
Audio
Driver	1DD + 8BA hybrid	1DD + 3BA hybrid
Driver type	hybrid	hybrid
Driver configuration	1DD + 8BA	1DD + 3BA
Driver size	8 mm	10 mm
Drivers per side	9	4
Features
Active noise cancelling	No	-
Design
Connector	2-pin 0.78 mm	-

What reviewers said

EPZ K9

The EPZ K9 is a wired hybrid IEM that pairs a single dynamic driver with eight balanced armatures to deliver a warm, smooth, and musical sound signature. It offers strong detail retrieval, an airy presentation, and respectable bass impact, making it a versatile choice for everyday listening across genres. While its treble sparkle and spatial precision are not standout features, its overall coherence, build quality, and accessory package provide solid value at its price point.

Pro:Warm, balanced, and highly versatile tuning
Pro:Strong detail and good bass impact
Pro:Lush mids with wide soundstage

Con:Treble sparkle is limited
Con:Spatial cleanliness not its strongest trait
Con:May not suit treble-sensitive listeners

Yu9 Audio Que

The Yu9 Audio Que is a wired hybrid IEM that delivers a refined, flagship-inspired sound for under $500, blending controlled bass, organic mids, and airy treble with impressive spatial cues. Its vented shell prevents pressure buildup and offers strong technical performance, though the wide nozzle and fit may be a consideration for some listeners. Overall, it presents excellent value as a versatile, engaging single-set option.

Pro:Organic and natural midrange presentation
Pro:Controlled bass with good punch and texture
Pro:Airy treble that adds sparkle without harshness

Con:Wide nozzle may cause fit issues for some ears
Con:No noise cancellation or wireless options
Con:Stock cable could feel stiff for some users

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 comparison EPZ K9 Yu9 Audio Que