Enjoy premium sound reproduction with the Astell & Kern AK ZERO2, a pair of advanced Quad-brid in-ear monitors that’s build off the success of the original ZERO1 IEMs. Several enhancements have been added, including an ultra-refined crossover network design and acoustic chamber that perfectly harmonizes the four integrated driver types.
The AK ZERO2 features four drivers including a micro rectangular planar dynamic driver, two dual custom balanced armature drivers, and a 10mm dynamic driver with a piezoelectric transducer, which combine in a 3D printed acoustic chamber. The outer enclosure is crafted from a precision CNC-machined aluminum housing, which limits resonance to create a stable, high-quality sound. The ZERO2 includes two cables (4.4mm TRRRS and 3.5mm TRS) made from Hi-Fi-grade pure silver-coated OFC. A set of five silicone eartips, a pair of foam eartips, and a travel case are included.
At a Glance
- Four different types of drivers
- Perfectly harmonized driver structure
- Highest crossover 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
- High—crisp and dynamic treble sound
- The micro rectangular planar dynamic driver is 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. A&K 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 ultralow 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 10mm 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 10mm 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.
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