Fosi Audio IM4 vs Kiwi Ears KE4: which should you buy?

On aggregated review scores the Kiwi Ears KE4 comes out ahead with a HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Kiwi Ears KE4 - Outstanding overall at around $199.

Wired IEMs

Score breakdown

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

Kiwi Ears KE4 leads on 3 of 4 measures.

Fosi Audio IM4
Kiwi Ears KE4

HearWiki score

Sound

7.4

8.6

Value

7.8

8.6

Price (USD)

$100

$200

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

Fosi Audio IM4 (2025) against Kiwi Ears KE4 (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.

IM420251 yr newer
KE42024

Specifications

IM4KE4

Type: Wired IEMs; Wired IEMs
Price (USD): $100; $200
HearWiki score: 72; 84
Released: 2025; 2024
Availability: Sold new; Still sold new
Driver: 2× 10 mm dynamic; 2DD + 2BA hybrid
Driver type: dynamic; hybrid
Driver configuration: -; 2DD + 2BA
Driver size: 10 mm; 10 mm
Drivers per side: 2; 4
Impedance: 21 Ω; 28 Ω
Active noise cancelling: -; No
Weight: 7 g; -
Detachable cable: -; Yes
Connector: 2-pin 0.78 mm; 3.5 mm

Specification comparison of Fosi Audio IM4 vs Kiwi Ears KE4
Spec	Fosi Audio IM4	Kiwi Ears KE4
Type	Wired IEMs	Wired IEMs
Price (USD)	$100	$200
HearWiki score	72 / 100 Great	84 / 100 Outstanding
Released	2025	2024
Audio
Driver	2× 10 mm dynamic	2DD + 2BA hybrid
Driver type	dynamic	hybrid
Driver configuration	-	2DD + 2BA
Driver size	10 mm	10 mm
Drivers per side	2	4
Impedance	21 Ω	28 Ω
Features
Active noise cancelling	-	No
Design
Weight	7 g	-
Detachable cable	-	Yes
Connector	2-pin 0.78 mm	3.5 mm

What reviewers said

Fosi Audio IM4

The Fosi Audio IM4 is a wired, dual-dynamic-driver IEM that delivers a spacious, engaging sound with a focus on upper mids and treble detail. It suits acoustic and vocal-centric listening, though its tuning is more niche than universally neutral. With solid build quality, light weight, and strong value, it's a compelling budget option for those seeking a lively, open presentation.

Pro:Lightweight and comfortable fit
Pro:Spacious, open soundstage with good separation
Pro:Strong detail retrieval and resolution for the price

Con:Tuning is uneven for all-purpose use
Con:Metallic cymbal timbre at times
Con:Lower mids can sound slightly imbalanced

Kiwi Ears KE4

The Kiwi Ears KE4 is a wired hybrid IEM that offers a balanced, relaxing sound with a distinct twist on the popular 'New Meta' tuning, adding extra bass and treble sparkle. It delivers solid midrange clarity and a comfortable fit, making it a versatile choice for many genres, though its smooth presentation may not excite those seeking aggressive or highly dynamic sound.

Pro:Well-balanced hybrid tuning with rich lower mids and airy treble
Pro:Comfortable fit and broad genre versatility
Pro:Good resolution and clarity for its price

Con:Sub-bass can get overpowering at times
Con:Limited resolving power and dynamic impact
Con:Smooth tuning may feel less exciting than V-shaped alternatives

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

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