4.7 out of 5 StarsBased on 17 reviews

Kiwi Ears KE4

Completely Redesigned 2DD+2BA Hybrid IEM

Isobaric dual-dynamic bass

Two dynamic drivers

Knowles RAD33518 BA

Knowles driver contributes focused upper-mid

Custom RAB32257 BA

A custom balanced armature

Three-way natural-target crossover

The crossover is tuned

1-Year Warranty7-Day ReturnsFree Shipping over $50

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Natural Target Hybrid

Natural balance, built from an isobaric bass system and two precision BAs.

KE4 pairs two dynamic drivers in an isobaric low-frequency system with a Knowles RAD33518 and a custom RAB32257 balanced armature. The three-way design is tuned around a natural target: sub-bass extension, warm and realistic mids

Isobaric dual-dynamic bass

Knowles RAD33518 BA

Custom RAB32257 BA

Three-way natural-target crossover

Natural balance, built

A natural-target hybrid that combines an isobaric dual-dynamic bass system with two balanced armatures for full low-end extension, warm mids

Isobaric dual-dynamic bass

2 x Balanced Armatures

01 Isobaric dual-dynamic bass

Two dynamic drivers work as a coordinated low-frequency unit to improve extension and control without requiring an oversized enclosure.

02 Knowles RAD33518 BA

The Knowles driver contributes focused upper-mid and high-frequency detail with stable transient behavior.

03 Custom RAB32257 BA

A custom balanced armature supports the midrange and crossover integration for a natural tonal transition.

04 Three-way natural-target crossover

The crossover is tuned to connect sub-bass, warm mids, and precise treble as one coherent response.

KE4 follows a natural-target philosophy, delivering deep bass with sufficient extension while keeping the midrange warm and the upper range precise rather than exaggerated.

Kiwi Ears KE4

Levels matched at 1 kHz

The result is a completely balanced tone that accurately reflects the best qualities of each driver.

Bass Deep, rounded bass with generous weight

Mids Natural vocals with full, warm body

Treble Relaxed highs favor smoothness over sparkle

Soundstage Natural space with a closer center

Imaging Stable placement; softer edges when busy

How It Sounds

Deep sub-bass, warm mids

KE4 is designed as a complete all-rounder: the isobaric bass system supplies extension, while the dual BAs preserve natural midrange tone and controlled upper-frequency detail.

Natural

Isobaric

Balanced

Isobaric dual-dynamic bass

Knowles RAD33518 BA

The Knowles driver contributes focused upper-mid and high-frequency detail with stable transient behavior.

Who it's for

Deep sub-bass, warm mids

The natural-tuning listener

KE4 is organized around a balanced target rather than a sharply V-shaped or extreme specialty signature.

NaturalBalancedRealistic

The sub-bass listener

The isobaric dual-dynamic system extends low without pushing unnecessary warmth into the mids.

Sub-BassIsobaricControlled

The all-rounder

Warm mids and precise treble let KE4 move easily between contemporary music, acoustic recordings, and general media.

VersatileWarmPrecise

The hybrid upgrader

Two dynamics and two BAs provide a more specialized architecture while retaining a coherent, accessible tuning.

2DD+2BAHybridUpgrade

Balanced Tonal Signature

The KE4 follows Kiwi Ears’ new target tuning, emphasizing precise sub-bass impact, a warm yet natural midrange, and precise treble. This refined sound signature delivers powerful low-end, lush vocals, and airy upper-frequency detail.

Hip-HopPopVocalR&BRockElectronic

Innovative 2DD+2BA Hybrid Performance

Powered by a 2DD isobaric sub-woofer system, a customized RAB 32257 BA, and a Knowles RAD 33518 BA tweeter, the KE4 delivers fast, controlled sub-bass, lush textured vocals, and natural airy treble.

102dB (±1dB)Sensitivity

28 ohmImpedance

GamingOn-StageCommuting

Accurate Sound For Professional Use

With a 3-way passive crossover, 3 independent sound tubes, and handcrafted precision, the KE4 delivers reliable accuracy and immersive detail for gaming, stage monitoring, and daily listening.

2DD+2BADriver Configuration

6mmNozzle Diameter

First-step hi-fi listening

Kiwi Ears KE4 offers a completely redesigned 2DD+2BA hybrid system for listeners moving beyond basic earphones without sacrificing tonal balance or professional-grade accuracy.

Pop, R&B, and rock

A custom-tuned tonal balance with precise sub-bass impact, warm natural mids, and pristine treble gives modern vocals and rhythm sections a satisfying, engaging presentation.

How it compares

Technical Specifications

Inside the Box

Monitors

Kiwi Ears KE4 × 1 Pair

Cable

Cable × 1

Eartips

Eartips × 2 Pairs

Extras

Wearing Diagram Card × 1

Storage

Packaging Box × 1

Warranty

1 Year Warranty Card × 1

Drivers

Dynamic Drivers

2 x dynamic drivers in isobaric arrangement

Balanced Armatures

Knowles RAD33518 + custom RAB32257

Crossover

3-way crossover

Acoustics

Impedance

28 Ohm

Sensitivity

102 dB +/- 1 dB

Tuning concept

Natural target with sub-bass extension, warm mids

Build & Fit

Shell

Medical-grade resin shell

Connector

0.78 mm 2-pin, detachable

Cable

Optional / Variants

Standard configuration includes a detachable cable

Cable Plug

3.5 mm single-ended

How it compares

KE4 in the lineup.

Kiwi Ears KE44.65

Kiwi Ears Septet 4.55

Kiwi Ears Quintet4.54

Kiwi Ears x HBB Punch4.25

Signature

["MEMS", "Configurable", "Hybrid"]

["Open-Back", "Quadbrid", "Airy"]

["Quadbrid", "Resolution", "Air"]

["Basshead", " Tribrid", "Electrostatic"]

Best for

["The tuning explorer"]

["The technology enthusiast"]

["The bass enthusiast"]

Standout

Five-driver hybrid array

Seven drivers across four technologies

DLC dynamic bass driver

Fifteen-decibel sub-bass shelf

Price

$199.00

$269.00

$219.00

$449.00

unboxing video

See it in Motion.

Verified buyers

Customer Reviews

Todo está perfecto, me encanta el sonido y el diseño es espectacular. Pero me gustaría que vinieran con un par de eartips más pequeños.

Kiwi Ears KE4

A Sound That Just Feels Right

My first experience to the new Meta Tuning - The KE4 immediately struck me as natural, it’s one of those IEMs that lets you stop analyzing and simply enjoy the music. After spending time with it, I understand why so many listeners are drawn to this tuning style.

Still haven’t revived my order.

I’m still waiting. The item is a Christmas gift for my daughters. I ordered on 12/9, it is now 12/24 and we haven’t received. Horrible

Hi there，

We sincerely apologize for keeping you waiting.

We have checked and confirmed that your package was successfully delivered on the 24th. Have you received it?

Typically, the shipping time would not take this long. The delay may have been caused by the recent holiday season coupled with a backlog of packages.

We apologize again for the unpleasant experience this has caused you.

My gaming rank

The Kiwi Ears KE4 stands as a masterclass in balanced armature tuning, delivering a pristine and highly articulate listening experience. Its quad-BA configuration achieves a remarkably coherent and neutral-natural sound signature, impressing with its exceptional clarity and detail retrieval across the frequency spectrum. The mids are transparent and lifelike, vocals shine with stunning presence, and the treble is extended and crisp without a hint of sibilance. While bass-light for some, its speed and texture are impeccable. For audiophiles and critical listeners seeking unparalleled accuracy, impeccable instrument separation, and pure, uncolored sonic fidelity at its price point, the KE4 is an undeniable triumph and a true reference-grade IEM.

Get the most out of it

Pairs well with

In-Ear Monitors

Kiwi Ears

KE4 II

$0.00

Reservation Card

Kiwi Ears

$1 Reservation Card For KE4 II

$1.00

In-Ear Monitors

Kiwi Ears × ふぐみかん

EMBER

$135.00

DAC/AMP

Kiwi Ears

Coda

$29.99

Eartips

Kiwi Ears

Kiwi Ears Flow Ear Tips

$9.99

Audio Cable

Kiwi Ears x B Media

Terras Headphone Cable

From $47.99

Before you buy

Product FAQ.

KE4 is designed as a complete all-rounder: the isobaric bass system supplies extension, while the dual BAs preserve natural midrange tone and controlled upper-frequency detail.

Kiwi Ears KE4 is especially well suited to the natural-tuning listener, the sub-bass listener, the all-rounder, and the hybrid upgrader. It is a natural-target hybrid that combines an isobaric dual-dynamic bass system with two balanced armatures for full low-end extension, warm mids, and precise treble.

Yes. Natural mids, clean sub-bass, and stable hybrid imaging make KE4 a versatile choice for both competitive cues and immersive game audio.

KE4 is suitable for clean portable dongles and players. A dedicated amplifier is not essential, although a better source may provide lower noise, finer volume control, and additional outputs.

Yes. It uses 0.78 mm 2-pin, detachable. The current source connection is 3.5 mm single-ended. Available configuration: Standard configuration includes a detachable cable with a 3.5 mm single-ended plug.

The current official package list includes 1 pair Kiwi Ears KE4 IEMs and Detachable cable.

Start with the size that seals evenly without creating pressure. A consistent seal is essential for bass extension, channel balance, isolation, and stable imaging.

Pair it with a clean source and the correct cable termination. Relevant Kiwi Ears options in this content set include Kiwi Ears Allegro Pro, Kiwi Ears Flex Ear Tips, and Kiwi Ears Sonicap.