Astell&Kern XIO – Flagship In‑Ear Monitors Blending Art & Acoustic Precision

The Astell&Kern XIO represents the pinnacle of in‑ear monitor design, born from a collaboration with 64Audio. More than just a listening device, XIO turns music into a tangible experience, combining cutting‑edge acoustic engineering with artistic craftsmanship. Built with 904L stainless steel and a DLC (Diamond‑Like Carbon) coating, these monitors deliver both stunning durability and unmatched sound fidelity.

Key Features

• Premium driver configuration: Dual dynamic drivers for lows, six balanced armatures for mids, one balanced armature for high‑mid, and one tia balanced armature for highs
• 904L stainless steel housing with DLC coating: Combines luxurious aesthetics with exceptional durability
• Integrated 4‑way crossover: Ensures smooth frequency transitions and precise tonal balance
• High‑purity cable: 0.78 mm 2‑pin 4.4 mm balanced silver‑plated UP‑OCC copper Litz cable for optimal signal transfer
• Reference‑grade tuning: Extended frequency range (5 Hz–22 kHz) with remarkable clarity and texture
• Art‑driven design: Crafted as a singular object that blends form and function at the highest level

Customer Benefits

The XIO offers an experience that transcends traditional in‑ear monitors. With its refined acoustic signature, ultra‑premium materials, and masterful engineering, it provides a deeply immersive sound for audiophiles and professionals who demand nothing short of perfection in their listening sessions.

Quick Specs

• Drivers: 2 × dynamic (low) + 6 × balanced armature (mid) + 1 × balanced armature (high‑mid) + 1 × tia balanced armature (high)
• Crossover: 4‑way passive
• Housing: 904L stainless steel with DLC coating
• Frequency response: 5 Hz – 22 kHz
• Sensitivity: 103 dB @ 1 kHz, 1 mW
• Impedance: 6.3 Ω @ 1 kHz
• Cable: 0.78 mm 2‑pin, 4.4 mm balanced, silver‑plated UP‑OCC copper Litz

What’s in the Box

• XIO Universal In‑Ear Monitors
• 64Audio Premium Leather Case
• TrueFidelity Foam Ear Tips (S, M, L)
• SpinFit Silicone Ear Tips (S, M, L)
• Standard Silicone Ear Tips (S, M, L)
• Cleaning Tool
• Cleaning Cloth
• Cable Clip
• 4.4 mm Silver‑Plated UP‑OCC Copper Litz Cable
• Apex Modules: m20 (Silver), Special m15 (904L Stainless Steel with DLC), m12 (Gold), mX (Black)

Use Cases / Ideal For

Perfect for audiophiles, professional musicians, and critical listeners who want uncompromising fidelity and design in a flagship in‑ear monitor.

Pros & Cons

✅ Pros:

• Top‑tier multi‑driver configuration with tia technology
• Stunning build quality using premium stainless steel and DLC coating
• Balanced 4.4 mm high‑purity cable for superior signal integrity
• Immersive, reference‑grade sound signature

⚠️ Cons:

• Low impedance may require a high‑quality source for optimal performance
• Premium price point reflects its flagship status

The Astell&Kern XIO redefines what’s possible in high‑end in‑ear monitors. Designed as an object of art and precision, it delivers breathtaking sound and craftsmanship for those who demand the very best. Discover XIO at Soundium.