Beryllium-coated driver | Pure titanium CNC-machined shell

Cryo-treated silver-plated monocrystalline copper cable

13.8mm external magnet dynamic driver

W-shaped diaphragm with independent surround

Acoustic Prism front chamber

Airflow-controlled damped rear chamber

Dual swappable tuning nozzles

Includes 3.5mm/4.4mm/TC swappable plugs

0.78mm 2-pin detachable cable

Designed around the acoustic characteristics of a single dynamic driver, we spared no effort in refining OAK NANO's diaphragm, magnetic drive, and voice coil—each detail a deliberate step toward higher performance and a more fully realized sound.

Custom-engineered Excellence in every detail

Advanced dynamic driver design

Lighter, Stronger Beryllium Dome

In our pursuit of perfection, we’ve achieved the impossible: a larger beryllium dome that is also significantly thinner. Paired with our newly engineered, high-flux magnetic circuit, the OAK NANO achieves lightning-fast transient response and breathtaking treble extension.

Noble refinement Timeless elegance

The OAK NANO utilizes pure titanium—prized for its density and hardness—to create a body that remains pristine through the passage of time. Through a series of demanding and precision manufacturing processes—including mirror polishing, CNC machining, and PVD coating—its distinctive design language is brought to life, allowing the earphone's unique color, luster, and sharp contours to emerge with striking clarity.

Pure titanium shell

Utilizing micro-precision CNC machining, a high-density acoustic damping mesh is integrated into the rear chamber vents of the OAK NANO to regulate internal airflow. This specialized damping effectively suppresses resonance, resulting in deeper and more authoritative bass. The midrange benefits equally, with vocal body and density in the 100Hz–4kHz range noticeably enriched. The result is that the mids and bass are fuller and more satisfying across the board.

Precision airflow control Transformed mids and bass

Airflow-controlled damped rear chamber

Precision correction Keeping sound on track 

Front chamber Acoustic Prism system

 The OAK NANO utilizes an advanced Acoustic Prism to ensure your music stays "on track." This technology, proven in the acclaimed FD7, corrects the phase of sound waves as they travel through the chamber. By resolving time-lag and standing wave distortion, it allows for superior control over every frequency for a more refined sound.  

The story of the OAK Series

Supreme elegance.

A new movement in sound.

The new OAK Series was inspired by classic wristwatch aesthetics. We celebrate the watchmaker’s quest for the absolute, translating that dedication into rock-solid build quality and an elegance that never fades. Where sound meets light, individuality and sophistication take center stage.

OAK NANO is the first of the OAK Series, the spiritual successor to the FIIO FD7, and SNOWSKY's first flagship product. The OAK NANO was created through two years of research and development—a journey of unceasing refinement in pursuit of watch-grade craftsmanship and exceptional sonic character. The engineering team chose beryllium metal for the diaphragm—the same precious material found in the FD7. Its rare combination of lightness and rigidity yields a distinctively clear and open sonic character. Together with a suite of sophisticated acoustic innovations, OAK NANO turns every listening session into a premium auditory indulgence.

Inheriting the acoustic DNA of the legendary FIIO FD7, the OAK NANO continues the legacy of beryllium-based diaphragms while charting a new path. Beryllium as a driver material is ultra-lightweight, exceptionally rigid, and superior to aluminum or titanium. Its low damping and high sonic velocity ensure zero unwanted coloration, making it the premier choice for high-end audio. While global supply chains have made pure beryllium increasingly rare, the OAK NANO utilizes a specialized beryllium alloy that mirrors the performance and sonic characteristics of the pure metal. We have pushed the boundaries of precision engineering to reduce the diaphragm's thickness, further unleashing the material’s potential. This significantly enhances high-frequency extension, transient response, and distortion control, allowing for the precise restoration of micro-details—from the crisp strike of percussion to the delicate nuances present in vocals.

Superior materials Sublime fidelity

Reimagining the conductor

The next level of sonic purity

13.8mm external magnet dynamic driver

Building on the legacy of the FD7, OAK NANO steps up to a larger 13.8mm driver unit with an enlarged and thickened magnet to match. A larger magnet means a stronger and more stable magnetic field. Lab testing confirms that magnetic flux density within the voice coil gap reaches nearly 1.5T, with distortion as low as 0.1% even at 114dB SPL. This immense magnetic force provides the raw driving power necessary for greater amplitude and minimal vibration distortion, resulting in superior transient response.

Seamless compatibility Built around your needs

Detachable cable and swappable plugs

The OAK NANO is engineered for ultimate flexibility. With a fully detachable cable and a swappable plug system, it adapts effortlessly to any listening environment. Included are three interchangeable connectors to cover all your devices. Notable is the Type-C plug, which unlocks a rich suite of real-time tuning options—giving you the power of multiple setups in a single device.

True to our commitment to going above and beyond, OAK NANO comes standard with 22 pairs of eartips in a variety of styles, along with a newly designed carrying case. Everything you need, right out of the box—no afterthoughts required.

Premium accessories Exceptional standards

22 eartips and custom carrying case

22 Pairs 3 Distinct Eartip Styles

*Please see the accessories list for details on included eartiips.

OAK NANO has passed the high-fidelity audio certification standards set by the Japan Audio Society and the Consumer Electronics Association—a trusted mark of quality that speaks to its faithful, true-to-source sound reproduction.

The gold standard of fidelity

Officially recognized

Hi-Res Audio certified

Basic specifications