Astell&Kern, the name synonymous with premium high-resolution audio, and 64 Audio, a leader in cutting-edge in-ear monitor technology, have come together for the first time to create something extraordinary: XIO.
First previewed at the High End Show in Munich earlier this year, XIO will be available worldwide in August 2025 through authorised Astell&Kern dealers at $3,000. More than just a flagship in-ear monitor (IEM), XIO redefines what personal audio can be—merging precision engineering with artistry to sculpt sound into a deeply immersive experience.
Meticulous Engineering Inside and Out
At the heart of XIO is a 10-driver hybrid system paired with a 4-way passive crossover.
This configuration delivers a stunning balance of frequencies, creating a vast, lifelike soundstage.
Key technologies include:
● tia® Waveguide: Eliminates sound tubes to reduce distortion, producing airy, delicate highs.
● Balanced Armature Manifold: Seven drivers tuned for midrange clarity and rich textures.
● TRUE ISOBARIC Dual-Dynamic Bass: Dual dynamic drivers in an acoustically neutral chamber generate bass with density and authority rarely achieved in IEMs.
XIO also incorporates 64 Audio’s patented apex® venting system, which relieves air pressure in the ear canal, minimising fatigue while enhancing the sense of space. Meanwhile, LID (Linear Impedance Design) ensures a stable sound signature, regardless of the source device.
Artistry Meets Acoustics
XIO isn’t just about performance—it’s designed as an audio art piece. Its housing is crafted from precision-milled 904L stainless steel, finished with a striking black Diamond-Like Carbon (DLC) coating for durability and elegance. The sculpted faceplate reflects Astell&Kern’s design DNA, balancing depth, light, and shadow in a form that feels as luxurious as it sounds.
Completing the package is a silver-plated UP-OCC copper Litz cable. With its cross-braided structure and ultra-low impedance, it ensures transparent, distortion-free transmission while complementing the IEM’s premium aesthetic.
Handcrafted in the USA
Each pair of XIO is meticulously assembled in the United States by 64 Audio’s expert engineers, using globally sourced premium components.
From its bold design to its innovative acoustic engineering, XIO sets a new benchmark in high-end IEMs—a true fusion of technical mastery and musical artistry.
Availability
The Astell&Kern x 64 Audio XIO will be available in August 2025 through authorised dealers worldwide for $3,000.
Find out more here.
