$ 449.00

$ 699.00


The New Standard for Hybrid Sound

The AK ZERO1 is a brand-new In-Ear Monitor product from Astell&Kern. Astell&Kern strives to inspire and bring enjoyment to all through the magnificence of experiencing music as close to the original sound.   We worked tirelessly to find ways of helping more people enjoy the pleasure of music and strive to develop sound as true to analog as possible.   AK ZERO1 is the first model that offers the sound that only Astell&Kern can provide.   Three Different Types of Drivers Perfectly Harmonized Driver Structure Highest Cross-Over Network Management Acoustic Chamber created using 3D Printed Technology Precise CNC Machined Metal Housing Hi-Fi Grade Pure Silver-Coated OFC Cable Hand Crafted in Japan   Introducing the first In-Ear Monitor from Astell&Kern, the long-awaited AK ZERO1.    


ZERO is a number that represents the reference point, and it also means the beginning.

Astell&Kern, the global leader in the Hi-Fi portable audio market, introduces a new In-Ear Monitor product from the starting point of "ZERO".

AK ZERO1 is a new start for Astell&Kern and aims to be the new standard for In-Ear Monitors.

By building on our experience in IEM manufacturing from “ZERO,” we push to make ZERO1 a truly best in class product and a market leader in the Hi-Fi IEM arena.

Hybrid Essence Promise
We create the perfect balance by considering different preferences. We believe that wherever you are, the highest quality should be fulfilled as purely and honestly as possible. We embark on new challenges to break new boundaries and enter a new era.


The Hybrid IEM with Each Driver's AK Sound Distributed Harmoniously

The hybrid IEM AK ZERO1 focuses on combining the sounds of three unique driver technologies into one IEM.

Composed of a Micro Rectangular Planar Dynamic Driver, two BA drivers, and a 5.6 mm Dynamic Driver, the AK ZERO1 harmonizes the characteristics of each driver to deliver the most natural sound to your ears.

An ideal frequency response was created through the Cross Over Network, which is designed based on a thorough understanding of each driver’s parameters. At the same time, each driver is carefully placed in the optimal 3D position, enclosed in specifically designed acoustic chambers manufactured with precise 3D printing technology.

By implementing this, we eliminated unnecessary movement and resonance of the drivers to ensure a stable performance.

The housing, which  is designed with Astell&Kern's unique advanced aluminum-refining technology, keeps resonance to a minimum and creates the highest-quality sound.

Special Micro Rectangular Planar Dynamic Driver, Crisp and Dynamic Treble Sound

The Micro Rectangular Planar Dynamic Driver is a specially developed driver with highly advanced technology that allows a planar driver, normally a very difficult driver to scale down, to be applied to in-ear monitors.

Dual Custom Balanced Armature Driver, Transparent Vocal Sound

Two BA drivers are made using custom coil parameters and offer crystal-clear vocals with super-low distortion.

Single 5.6mm Dynamic Driver, Rich and Deep Bass Sound

The 5.6 mm Dynamic Driver has been created through a fully automated, error-free process, ensuring rich, controlled and deep low frequencies.

Hi-Fi Grade Pure Silver-Coated OFC 4 Core Cable

The Pure Silver-Coated OFC cable maximizes the performance of the Hybrid IEM AK ZERO1. It has been exquisitely crafted with high-purity silver plating and copper, and the aluminum plugs give it even more class.

The MMCX connector provides the best quality, offering a long-lasting stable performance.

*A 3.5mm cable is included with AK ZERO1 Black & a 4.4mm special black cable is included with AK ZERO1 Special Edition Black.

*4.4mm balanced cable sold separately, 4.4mm MMCX Cable by A&K (PEP11).

Made in Japan

The Hybrid IEM AK ZERO1 is meticulously manufactured and assembled by highly experienced engineers in facilities in Japan to the highest of tolerances, achieving the highest quality possible.



AK ZERO1's premium sound will open up a whole new world that you have never experienced before, elevating you beyond the boundaries of sound.

This is symbolized by the bold diagonal line that crosses the product, reflecting the identity of the AK ZERO1.

"The Boundary to a New World” This key phrase encompasses the design of the AK ZERO1.

The cut surface created by the character line of the AK ZERO1 shimmers in the light, emphasizing the premium quality of the product.

The shape of the AK ZERO1 has been carefully designed and refined along the inner ear canal to fit your ears perfectly. 

Light bounces off each surface, making the earpieces glisten like jewelry.




Body Color Black, Special Edition Black


Hybrid Drivers

[Special Micro Rectangular Planar Dynamic Driver x1]
[Custom Balanced Armature Driver x2]
[5.6mm Micro Dynamic Driver x1]


MMCX Connection
AK ZERO1 Black: 3.5mm Silver-Plated Copper Cable
AK ZERO1 Special Edition Black: 4.4mm Silver-Plated Copper Cable

Housing Material


Frequency Response



96dB @ 1kHz (1mW)


16Ω @ 1kHz

Total Harmonic Distortion

0.7% @ 1kHz


Package contents include: 

    • AK ZERO1 Earphones L/R x 1
    • Cable:
      • AK ZERO1 Black: 3.5mm MMCX Cable x 1
      • AK ZERO1 Special Black Edition: 4.4mm MMCX Cable x 1
    • 5 Pairs of Silicone Ear tips
    • 1 Pair of Foam Tips
    • Carrying Case x 1