The housings feature a lightweight honeycomb-structured aluminum, while the frame and arms are crafted from magnesium,
chosen for its thin profile, high rigidity, and exceptional vibration-damping properties.
With Alcantara® earpads installed, the headphone achieves an impressive weight of just 270g, seamlessly balancing comfort and acoustic performance at the highest level.
Each production step carries the craftsmanship and human touch of skilled artisans, embodying both analog precision and emotional sensibility.
Meticulously hand-finished, this headphone stands as a masterpiece of dedication to sound — a creation where technique meets artistry,
revealing new layers of discovery and inspiration with every listen.
● The Ultimate Expression of Open-Back Headphone Design — Reproducing Sound with Naturally Moving Diaphragms
Rather than confining sound around the ears, the ATH-ADX series integrates the natural flow of air into its acoustic architecture.
Sound is released freely into space, carried by air rather than trapped within the housing—
like the delicate chirping of insects carried on the breeze, it feels organic, effortless, and gently resonant within the listener’s body.
While conventional open-back headphones focus primarily on technical openness—soundstage or imaging—
Audio-Technica centers its philosophy on the relationship between sound and the listener.
Here, sound becomes more than a signal — it breathes, resonates, and connects emotionally,
allowing the listener to merge with the music in an experience of complete immersion and harmony.
● Precision and Distinction from Other Headphone Designs
1. Acoustic Design Differences: Closed, Semi-Open, and Open-Back Structures
In open-back headphones, the housing allows unrestricted airflow.
Thus, the essential challenge is how to precisely control the movement of air generated by the diaphragm.
Audio-Technica applies distinct acoustic theories for closed and open systems,
ensuring that each structure achieves its optimal sonic performance.
2. Precision in Driver Engineering
The sound of Audio-Technica’s open-back headphones reflects decades of transducer innovation.
With drivers and enclosures developed specifically for True Open-Air Audio (TOA),
they deliver an exceptionally natural soundscape — deep, fluid lows; lifelike, expressive mids; and endlessly extended highs.
Each motion of the diaphragm directly creates air vibrations, without artificial frequency manipulation, resonant chambers, or acoustic ducts.
The result is a pure, uncolored, and breathtakingly real sound field.
Unparalleled Driver Design — HXDT (Hi-Concentricity X Dynamic Transducer) Technology
In pursuit of the ideal diaphragm form, Audio-Technica has spent over 30 years developing its proprietary HXDT (Hi-Concentricity X Dynamic Transducer) technology.
Designed and engineered entirely from the ground up, this advanced driver manufacturing method achieves both exceptional signal accuracy and consistent sonic reproduction.
The result is a sound core that remains unwavering, with extraordinary clarity and precision that transforms technical mastery into auditory art.
With in-house developed precision molding techniques, the diaphragm’s shape is controlled at the nanometer level.
The baffle, magnet, voice coil, and diaphragm are meticulously aligned on the same axis, achieving a tenfold improvement in structural precision compared to previous models.
This remarkable accuracy delivers a pure, dimensional sound field — the true fusion of artisanal craftsmanship and acoustic science.
- The φ58mm driver unit features an integrated aluminum baffle structure, precision-machined from a solid aluminum billet.
By unifying the baffle and driver into a single body, the number of structural components is minimized, effectively eliminating even the slightest distortion from the sound path.
The finely machined aluminum maximizes the material’s inherent acoustic properties while suppressing unwanted resonance and achieving weight reduction through meticulous craftsmanship.
Advanced five-axis machining creates smooth, organic curves that combine acoustic function with refined aesthetics.
Each pair of headphones bears a unique laser-engraved serial number on its aluminum baffle, symbolizing true individuality and exclusivity.
- For the first time in headphone design, non-oriented electromagnetic steel — a unique material developed in Japan, has been adopted in the magnetic circuit.
This special material allows magnetic flux to flow uniformly in all directions, minimizing energy loss and greatly improving electrical conversion efficiency.
The stabilized and evenly distributed magnetic flow effectively reduces noise generation, resulting in exceptional transparency, purity, and a remarkably quiet, natural sound field.
Proprietary Core Mount Technology (PAT.P)
By re-examining the positional relationship between the baffle damper and the ear pads, the driver’s voice coil is strategically
placed at the midpoint of the acoustic space between the listener’s ear and the housing.
This configuration achieves a remarkably balanced and natural sound field, enabling open, airy reproduction with exceptional clarity and presence.
490Ω High-Impedance Voice Coil
For the first time in the ADX series, a custom-designed air-core voice coil has been adopted,
achieving a high-impedance configuration that delivers more powerful electromagnetic drive.
This enhances responsiveness across all frequency ranges and expands the dynamic range,
faithfully expressing every nuance — from the most delicate tones to the most dynamic passages — with depth and precision.
Approaching the essence of music with a natural and open sound
An analog aesthetic woven with depth and realism
The low frequencies extend deeply with power, anchoring the sound space with presence. The midrange is smooth and refined,
naturally positioning each instrument while capturing every nuance of the performance. The highs are delicate and airy, imbuing vocals with intimacy and realism.
- Three-dimensional spatial imaging that brings the sound to life
With an expansive stereo image and clear instrument separation, the structure of the music is revealed in three dimensions.
Rather than artificial sharpness, the sound image has depth and layered richness, creating a sense of real spatial depth and vivid presence — as if you were standing right at the performance scene.
Lightness that inspires comfort
Featuring a precision-crafted honeycomb-punched housing born from Japan’s advanced metalworking expertise
The special honeycomb aluminum housing is not shaped through standard machining but meticulously pressed and formed by skilled Japanese artisans.
This masterful craftsmanship maximizes driver efficiency and diaphragm linearity, enhancing transient response and expressive clarity.
- Lightweight yet rigid magnesium frame and arms
The molded magnesium frame and arms offer both high rigidity and exceptional vibration damping. By minimizing unwanted resonance and maintaining a remarkably low specific gravity of about 1.74, the design achieves both sonic purity and superior wearing comfort.
- Pursuit of overwhelming lightness and fit
Combining the honeycomb aluminum housing with a magnesium frame and arms, and paired with Alcantara® earpads, the result is an exceptionally lightweight body of just 270g. The structure flexibly follows head movements while preserving acoustic stability, ensuring lasting comfort even during extended listening sessions.
- Titanium sliders for precision and durability
Beautifully polished titanium sliders enhance structural integrity and longevity. They maintain precision over years of use without compromising acoustic performance, delivering a refined and smooth adjustment experience.
Two selectable earpad options.
Premium velvet earpads crafted by Myouchu Pile Textile Co., Ltd.
From the moment they touch your ears, the earpads deliver an exceptionally soft, gentle feel.
Their luxurious texture ensures fatigue-free comfort, even during extended listening sessions, creating an ideal environment for musical immersion.
The high-density fiber weave provides excellent breathability, minimizing unwanted reflections and distortions to faithfully reproduce every sonic detail with remarkable precision.
- Alcantara® earpads – the perfect balance of comfort and acoustic refinement
The second earpad option features luxurious synthetic suede made by Italy’s renowned Alcantara® company. Its smooth, velvety surface and superior airflow maintain comfort over long listening periods. With outstanding durability, these earpads retain their beauty and performance through daily use, offering both elegance and enduring acoustic excellence.
Compatible with dual-sided balanced cable connection
Includes detachable balanced and unbalanced cables with nylon-braided sheaths
The package includes two 3.0m detachable cables: a balanced XLR cable and an unbalanced 6.3mm stereo plug cable, designed for Hi-Fi audio equipment.
The balanced cable features premium Neutrik XLR male connectors, ensuring robust signal integrity and professional-grade reliability.
- A2DC connectors – engineered for stable signal transmission and superior durability
Equipped with A2DC (Audio Designed Detachable Coaxial) connectors, purpose-built for exceptional audio fidelity and long-term durability. The uniquely designed connector tip eliminates noise and signal interruptions, maintaining a consistent connection even with frequent movement. Its reliability ensures accurate signal transfer and enduring performance through years of listening enjoyment.
MADE IN JAPAN
Designed and handcrafted entirely in Japan
From concept and engineering to final assembly, every process of this flagship model is meticulously handled by Japanese engineers and master craftsmen. The precision and craftsmanship refined in Japan form the very core of this headphone’s sonic purity and reliability.
Other Features
Delivers its full sonic potential when paired with high-performance audio equipment.
Highly recommended for users who own powerful desktop amplifiers or dedicated headphone amps.
※Due to its high-impedance design (490Ω), sufficient volume may not be achieved with certain playback devices.
- Wide frequency response range from 5 to 50,000 Hz
- Includes a durable, portable storage case for safe transport and everyday practicality
