Astell&Kern AK ZERO2 | Quadbrid Universal IEMs

AK ZERO2 Combines Advanced IEM Technology with Astell&Kern's Tuning Prowess

• Quadbrid setup: Planar Magnetic, BA, Dynamic, and Piezoelectric drivers with advanced cross-over
• 3D printed acoustic chamber dedicated to each driver for crystal clear, optimally balanced sound
• Each unit meticulously crafted in Japan
• Precise CNC Aluminum housing and high-purity, silver-coated OFC cable with MMCX connectors

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 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.

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.

Transparent Vocal 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.

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.

Super-Low-Noise Cross-Over Network
The ultra-refined cross-over network enables a perfect balance between six drivers with distinctive sound characteristics, maximizing each of their acoustic traits while creating a balanced harmonized sound.

Each Driver Has an Acoustic Chamber Made Using 3D Printing Technology
Each driver is placed optimally in an acoustic chamber that is created through refined 3D printing technology. This design eliminates any unnecessary movement and resonance of the drivers for permanently stable performance.

High Quality Construction

The housing, which is made using Astell&Kern's advanced aluminum processing technology, limits resonance to create stable high-quality sound. The pure silver-coated OFC cable, designed to maximize the performance of the AK ZERO2, is created with high-purity silver plating and copper, and adds a touch of style with plugs crafted from aluminum. The MMCX connectors offers a robust connection and a long-lasting and stable life cycle.

Each AK ZERO2 is meticulously assembled by professional technicians with extensive experience and is produced at our state of the art facilities in Japan to offer you the highest quality through strictly managed processes.

Unmatched Astell&Kern Technology

The AK ZERO2 is a bold stride forward from the AK ZERO1 into new territory, setting a new bar for clear audio. This outlines the design identity and new standards of the AK ZERO2. The diagonally cut hexagonal shape leaves a powerful impression, creating a new sound experience that sets a clear standard. The shape of the AK ZERO2 is designed to fit naturally in your ears to allow music to be enjoyed comfortably. The colorful shapes change with the lighting to offer a whole new experience alongside the unmatched sound.

Specifications

• Driver: Quad-brid Drivers
• (x1) Special Micro Rectangular Planar Dynamic Driver
• (x4) Custom Balanced Armatures
• (x1) 10mm Micro Dynamic Driver with Piezoelectric Transducer
• Cable: MMCX Hi-Fi Grade Pure Silver-coated OFC 4 Core (4.4mm, 3.5mm)
• Material: Aluminum
• Frequency Response: 20Hz–30KHz
• SPL: 105dB@1KHz(1mW)
• Impedance: 5Ω@1KHz
• THD: 0.7%@1kHz
• Astell&Kern 1 Year Warranty

In the Box

• AK ZERO2 Earbud L/R
• (x1) 3.5mm cable
• (x1) 4.4mm cable
• 5 pairs silicone ear tips
• 1 pair foam tips
• Carrying Case