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.

64 Audio has established itself as an innovative company that pushes the boundaries of IEMs, thanks to a team of top professionals and proprietary patented technologies.

“XIO boldly opens a new chapter in the evolution of high-end in-ear monitors. It goes beyond simply reproducing sound—it embodies our philosophy of sculpting sound itself. By combining mechanical perfection with musical sensibility, XIO creates value that exceeds expectations.”

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
The XIO is meticulously engineered inside and out to deliver an unparalleled listening experience. Its advanced 10-driver hybrid system, paired with a 4-way passive crossover, ensures every frequency is perfectly balanced, providing a rich, spacious soundstage with realistic depth.

10-Driver Hybrid System

tia® Driver & Waveguide
The tia® driver features a direct-radiating structure that eliminates the traditional sound tube, enhancing the delicacy of high frequencies. By minimizing damping and distortion, and combining a custom waveguide system, it delivers airy, detailed highs and a deep sense of space.

Balanced Armature (BA) Drivers
Mid and upper-mid frequencies are powered by six and one balanced armature drivers, respectively, for smooth transitions and rich texture. Vocals and instruments are rendered with warmth and clarity, creating a natural, well-balanced soundstage.

TRUE ISOBARIC Dual Dynamic Driver
This structure uses two dynamic drivers perfectly synchronized within an acoustically neutral coupling chamber, allowing precise bass control. The design delivers deep, dense, and impactful bass, surpassing the capabilities of conventional IEMs.

Patented Technologies

tia (Tubeless In-Ear Audio)
A patented design minimizing resonance and distortion for clear, vivid sound. The tia system—comprising the tia driver, single-bore design, and acoustic chamber—captures the pure essence of sound.

APEX (Air Pressure Exchange)
This patented venting system naturally releases pressure from the sealed ear canal while maintaining excellent noise isolation, reducing listening fatigue during extended sessions and providing a wider, more realistic soundstage. The XIO includes a redesigned m15 apex module with DLC-coated 904L stainless steel, an exclusive solution for this model.

LID (Linear Impedance Design)
Patented circuitry compensates for nonlinear resistance between drivers, ensuring consistent sound quality regardless of the source device’s output impedance. This provides a stable sound signature and accurate frequency response at all times.

Precision-Milled 904L Stainless Steel Shell
The XIO exterior is crafted as an “audio art piece,” combining visual elegance with tactile luxury. Its robust shell is precision-machined from 904L stainless steel, a material harder and more challenging than standard stainless steel, and finished with a black DLC (Diamond-Like Carbon) coating for a premium texture. The faceplate reflects Astell&Kern’s design heritage, with a three-dimensional presence, deep shading, and delicate reflections.

Physical Specifications

Model: XIO
Material: 904L Stainless Steel with DLC (Diamond-Like Carbon) Coating
Cable: 0.78mm 2-pin, 4.4mm Silver-Plated UP-OCC Copper Litz Cable

Technical Specifications

Driver Configuration:
TRUE ISOBARIC Dual Dynamic Driver
6x Mid-Frequency BA Drivers
1x High-Mid Frequency BA Driver
1x TIA® High-Frequency Driver
Crossover: Integrated 4-way Passive Crossover

Special Features:
- TIA® Waveguide Technology
- Apex Module
- 0.78mm 2-pin Socket

Audio Specifications
Frequency Response: 5Hz – 22kHz
SPL: 103dB @ 1kHz, 1mW
Impedance: 6.3 ohms @ 1kHz

Orders ship Sunday through Friday from our offices in Dubai, UAE.

In-stock products typically ship within 48 hours and should be expected to arrive in 3-4 business days. Orders outside of the UAE should be expected to arrive in 5-7 business days.

Pre-order and backorder products will state the approximate delivery timeline beside the Add To Cart button.

If you would like to place a custom order, chat with our specialists for a guided shopping experience. Once your order has been placed, a timeline will be provided depending on your order details.

- Free delivery within the UAE
- Shipping charges will be calculated upon checkout for orders outside of the UAE (Bahrain, Oman, Kuwait, Saudi Arabia & Qatar).
- Taxes and duties are calculated according to the applicable laws of the state or country an item is shipped to and are the customer's responsibility.

For additional information on shipping and our exchange & return policy visit our help center.

Installation charges are applicable and can be paid upon delivery for our clients based in Dubai.

- Installation Charges: AED 450 Per Hour
- Speaker Cables: AED 32 Per Meter
- Trunking: AED 10 Per Meter

For clients based outside of the UAE, please contact our specialists and we will share an estimate based on your requirements.