Astell&Kern AK ZERO2 Quad-Driver Hybrid IEM Earphones

AK ZERO2 Quad-Driver Hybrid IEM Earphones, by Astell&Kern.

Astell&Kern's philosophy of striving to deliver ultra-precise original sounds has been praised by many audiophiles from the result of their 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 harmonise the four different drivers that power the AK ZERO2, designed to play the true sounds of Astell&Kern.

The AK ZERO2 is an IEM that features a Quad-brid design centred 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.

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.

A&K selected a light-yet-sturdy planar membrane to minimise 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.

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 harmonise each frequency range, playing perfect 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.

The pure silver-coated OFC cable, designed to maximise 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 aluminium.

The MMCX connectors offers a robust connection and a long-lasting and stable life cycle.

Comparison

Features

• Four different types of drivers.
• Perfectly harmonised 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.

Specifications

• Model: AK ZERO2
• Driver: Quad-brid Drivers
• Special Micro Rectangular Planar Dynamic Driver x 1
• Custom Balanced Armature Drivers x 4
• 10 mm Micro Dynamic Driver x 1 with Piezoelectric Transducer
• Cable: MMCX, Hi-Fi Grade Pure Silver-Coated OFC Cable 4 Core (4.4 mm, 3.5 mm)
• Material: Aluminium
• Frequency Response: 20 Hz – 30 KHz
• SPL: 105 dB @ 1 KHz (1 mW)
• Impedance: 5 Ω @ 1 KHz
• Total Harmonic Distortion: 0.7 % @ 1 kHz

Included

• 2 x AK ZERO2 Earbuds (L / R)
• 1 x 3.5 mm cable
• 1 x 4.4 mm cable
• 5 x pairs of silicone ear tips
• 1 x pair of foam tips
• 1 x Carrying Case

More Information

• AK ZERO2 Quad-Driver Hybrid IEM Earphones, by Astell&Kern