Advanced Quad-brid IEM

Astell&Kern's philosophy of striving to deliver ultra-precise original sounds has been praised by many audiophiles from the result of our first IEM, the AK ZERO1.

The AK ZERO2 is a professional IEM made using advanced technologies based on our experience gained from the development of the AK ZERO1.

The ultra-refined cross-over network design and acoustic chamber perfectly harmonize the four different drivers

that power the AK ZERO2, designed to play the true sounds of Astell&Kern.

·         Four different types of drivers

·         Perfectly harmonized driver structure

·         Highest Cross-Over Network Management

·         Acoustic Chamber by 3D Print Technology

·         Precise CNC Metal Housing

·         Hi-Fi Grade Pure Silver-Coated OFC Cable

·         Made in Japan.

Advanced Quad-brid Design and

Ultra-refined Cross-over Network

The AK ZERO2 is an IEM that features a “Quad-brid” design centered around an advanced driver array and a Super Low Noise Cross-Over Network perfectly tuned. Four different types of driver, including Custom BA Drivers, a Planar Dynamic Driver, a 10-mm Dynamic Driver, and a Piezoelectric Transducer create the perfect synergy, coming together to form the Quad-brid AK ZERO2 capable of reproducing the pure sounds that Astell&Kern strives to deliver.

Special Micro Rectangular Planar Dynamic Driver

- [High] Crisp and Dynamic Treble Sound

The Micro Rectangular Planar Dynamic Driver is a driver specifically developed to deliver high frequencies, featuring advanced technology that allows a planar driver to be used in IEMs, despite the extreme difficulty in making it small enough to fit in such a small cavity.

We selected a light yet sturdy planar membrane to minimize frequency loss and applied a trembler with a thin metal membrane and polymer film to create lifelike vivid high frequencies. This provides a clear and dynamic high-frequency response.

Dual Custom Balanced Armature Drivers

- [Mid-Low] Transparent Vocal sound

- [Full Range] Perfectly Balanced and Rich Sound

The Coil Parameter Dual Custom BA Driver is a custom-made driver designed to reproduce both full-range and mid to low-range frequencies.

It comes with a total of four drivers: two BA drivers that offer ultra-low distortion to create clear low- to mid-ranged vocal sounds and two BA drivers that offer perfectly balanced rich sounds, uniquely tuned to harmonize each frequency range, playing perfect sounds.

Single 10-mm Dynamic Driver with Piezoelectric Transducer

- [Low & Super High] The Deepest Bass and Clear Treble Sound

Various types of carefully designed drivers create rich, Hi-Fi sounds. The 10-mm dynamic driver used in the AK ZERO2 is meticulously manufactured using a fully automated process. This allows the driver to recreate rich and deep low frequencies.

An additional piezoelectric transducer works in tandem with the dynamic driver, serving as a super tweeter that asserts its presence in the super-high frequency range that many IEMs struggle to recreate.