Astell & Kern ZERO2

Advanced Quad-brid IEM

Astell&Kern’s unwavering commitment to delivering unparalleled, true-to-original sound experiences has garnered accolades among discerning audiophiles, a testament apparent in our inaugural In-Ear Monitor (IEM), the AK ZERO1.

Building upon the success and insights derived from the development of the AK ZERO1, the AK ZERO2 stands as a testament to our dedication to pushing the boundaries of audio excellence. Crafted with advanced technologies, this professional IEM boasts an ultra-refined cross-over network design and meticulously engineered acoustic chambers, achieving a seamless harmony among its four distinct drivers.

Designed with the sole purpose of authentically reproducing the essence of Astell&Kern’s signature sound, the AK ZERO2 emerges as a pinnacle in audio innovation, ensuring a listening experience that resonates with the truest expressions of music.

• 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

At the heart of the AK ZERO2 lies a revolutionary “Quad-brid” design, meticulously crafted around an advanced driver array and an impeccably tuned Super Low Noise Cross-Over Network. This cutting-edge IEM showcases four distinct driver types, including Custom Balanced Armature (BA) Drivers, a Planar Dynamic Driver, a 10-mm Dynamic Driver, and a Piezoelectric Transducer. Together, these drivers seamlessly converge to create the Quad-brid AK ZERO2, a pinnacle of audio engineering.

The inclusion of Custom BA Drivers ensures precision in rendering intricate details, while the Planar Dynamic Driver contributes to a rich and immersive audio experience. The 10-mm Dynamic Driver adds depth and resonance to the sound, while the Piezoelectric Transducer brings a heightened level of clarity to the overall audio output.

In perfect harmony, these drivers, coupled with the Super Low Noise Cross-Over Network, establish the AK ZERO2 as an exceptional IEM capable of faithfully reproducing the pure sounds that Astell&Kern is renowned for. This Quad-brid configuration represents a union of innovation and craftsmanship, setting a new standard for audio excellence.

Special Micro Rectangular Planar Dynamic Driver

Crisp and Dynamic Treble Sound

The Micro Rectangular Planar Dynamic Driver represents a groundbreaking advancement in audio technology, purposefully engineered to excel in delivering high frequencies within the confines of In-Ear Monitors (IEMs). This specialized driver incorporates cutting-edge technology that overcomes the inherent challenges of integrating a planar driver into the compact space of an IEM.

Addressing the difficulty of size constraints, we have meticulously designed a lightweight yet robust planar membrane that minimizes frequency loss, ensuring a faithful reproduction of high frequencies. The inclusion of a trembler, featuring a thin metal membrane and polymer film, further elevates the performance by imparting lifelike and vivid qualities to the high-frequency spectrum.

This innovative combination of materials and design elements results in a clear and dynamic high-frequency response, allowing the Micro Rectangular Planar Dynamic Driver to unlock a level of precision and realism in audio reproduction that aligns seamlessly with Astell&Kern’s commitment to delivering an unparalleled sonic experience.

Dual Custom Balanced Armature Drivers

Transparent Vocal sound – Perfectly Balanced and Rich Sound

The Coil Parameter Dual Custom BA Driver stands as a bespoke marvel, meticulously crafted to excel in the reproduction of a wide spectrum of frequencies, ranging from full-range to mid- to low-range tones. This custom-made driver comprises a total of four drivers, embodying a dual configuration that contributes to the richness and clarity of the audio output.

Within this innovative design, two Balanced Armature (BA) drivers are dedicated to delivering ultra-low distortion, ensuring the creation of crystal-clear low- to mid-ranged vocal sounds. Concurrently, an additional two BA drivers are finely tuned to produce perfectly balanced and rich sounds, each uniquely calibrated to seamlessly harmonize within its designated frequency range.

This synergistic combination of drivers within the Coil Parameter Dual Custom BA Driver epitomizes Astell&Kern’s dedication to precision and perfection in sound reproduction. The result is an audio experience that transcends expectations, capturing every nuance and detail across the entire frequency spectrum, and exemplifying the commitment to delivering perfect sounds in every note.

Single 10-mm Dynamic Driver with Piezoelectric Transducer

The Deepest Bass and Clear Treble Sound

The AK ZERO2 embraces a spectrum of meticulously designed drivers, each contributing to the creation of rich and high-fidelity sounds. A key component in this sonic symphony is the 10-mm dynamic driver, crafted with precision through a fully automated process. This meticulous manufacturing ensures the dynamic driver’s ability to faithfully reproduce rich and deep low frequencies, adding a layer of depth and resonance to the overall audio experience.

In a seamless collaboration, an additional piezoelectric transducer complements the dynamic driver, functioning as a super tweeter. This specialized component addresses the challenges associated with the super-high frequency range, an area where many In-Ear Monitors (IEMs) often struggle to deliver clarity and precision. The piezoelectric transducer’s unique role as a super tweeter enhances the AK ZERO2’s capability to reproduce the finest details in the audio spectrum, contributing to an immersive and well-rounded Hi-Fi sound signature.

Through this harmonious integration of advanced technologies, the AK ZERO2 stands as a testament to Astell&Kern’s commitment to delivering an exceptional audio experience, characterized by richness, depth, and clarity across the entire frequency range.

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

The AK ZERO2 is accompanied by a meticulously crafted pure silver-coated Oxygen-Free Copper (OFC) cable, meticulously designed to elevate the IEM’s performance to its fullest potential. This cable incorporates high-purity silver plating along with copper, striking a harmonious balance that enhances conductivity and signal transmission. The connectors, crafted from aluminum, not only contribute to the cable’s performance but also add a touch of style to the overall design.

Featuring MMCX connectors, the cable ensures a robust connection, providing not only exceptional audio quality but also a long-lasting and stable life cycle. The MMCX connectors, known for their durability and reliability, guarantee a secure and uninterrupted listening experience, reinforcing the commitment to quality and longevity in the AK ZERO2’s design.

In essence, the combination of pure silver-coated OFC cable and MMCX connectors reflects Astell&Kern’s dedication to not only delivering superior audio performance but also ensuring a seamless and enduring connection for audiophiles who demand the utmost in both quality and style.

Astell & Kern ZERO2 Specifications

• Drivers:Quad-brid Drivers
• Special Micro Rectangular Planar Dynamic Driver x1
• Custom Balanced Armature Driver x4
• 10mm Micro Dynamic Driver x1 with Piezoelectric Transducer
• Connector type: MMCX
• Hi-Fi Grade Pure Silver-Coated OFC Cable 4 Core (4.4mm, 3.5mm)
• Housing material: Aluminum
• Frequency Response: 20Hz–30KHz
• SPL: 105dB@1KHz (1mW)
• Impedance: 5Ω@1KHz
• Total Harmonic Distortion: 0.7%@1KHz