64 Audio x Astell&Kern
XIO is the culmination of Astell&Kern and 64Audio’s shared philosophy on design and sound. Blending precision engineering with artistic sensibility, XIO goes beyond simply playing music. It shapes sound into a tangible experience, offering value that surpasses expectations.
Designed as a true object of art, XIO sets a new standard for high-end in-ear monitors—an uncompromising fusion of aesthetics and acoustics that redefines what's possible.
Designed as a singular object, XIO sets a new standard for high-end in-ear monitors through its uncompromising approach to both aesthetics and acoustics.
Internal Structure
01. tiaⓇ Waveguide
02. 0.78mm 2pin Socket
03. Diamond-Like Carbon (DLC) Coated 904L Stainless Steel
04. Mid Frequency BA Driver
05. TRUE ISOBARIC Dual Dynamic Driver
06. Diamond-Like Carbon (DLC) Coated 904L Stainless Steel
07. Apex Module
08. High-Mid Frequency BA Driver
09. Driver Housing
10. tiaⓇ High Frequency Driver
Engineered for Precision
XIO is meticulously engineered both inside and out.
Its advanced hybrid system, featuring ten high-performance drivers, is finely tuned with a 4-way passive crossover to ensure every frequency is in perfect harmony.
This precise tuning delivers a realistic sense of depth and a rich, spacious soundstage.
Silver Plated UP-OCC Copper Litz Cable
This dedicated cable, specially crafted for XIO, is designed to achieve perfect aesthetic harmony with the earbuds.
The four-core cross-braided cable is made from silver-plated, single-crystal copper (UP-OCC), offering outstanding noise shielding and transparent signal transmission.
With a low impedance of just 0.29Ω, it maximizes electrical efficiency.

Handcrafted IEM Made in the USA
64 Audio uses carefully selected components sourced from trusted partners around the world. Every step of design, assembly, and quality control is meticulously carried out by skilled engineers in the United States.
Components
· XIO Universal In-Ear Monitors
· 64 Audio Premium Leather Case
· TrueFidelity Foam Ear Tips (S,M,L)
· SpinFit Silicone Ear Tips (S,M,L)
· Silicone Ear Tips (S,M,L)
· Cleaning Tool
· Cleaning Cloth
· Cable Clip
· 4.4mm Silver Plated UP-OCC Copper Litz Cable
· Apex Modules: m20 (Silver)
Special m15 (904L Stainless steel with DLC Coating) m12 (Gold), mX (Black)
Hong Kong Authorized Product, Enjoy 1 Year Warranty