FiiO Oak Nano Silver

The FiiO OAK NANO is a premium in-ear headphone featuring a 13.8 mm dynamic driver with a beryllium-alloy diaphragm and a precision-machined pure titanium housing. Developed as the first model in FiiO's OAK series, it combines advanced driver engineering with carefully designed acoustic chambers to deliver detailed, controlled sound reproduction.

The large dynamic driver uses a W-shaped diaphragm with an independent surround, a high-flux external magnet and a pure copper voice coil. The acoustic prism in the front chamber helps correct phase and reduce standing-wave distortion, while the airflow-controlled, damped rear chamber regulates internal airflow to suppress resonances and enhance bass and midrange performance.

Two interchangeable tuning nozzles provide different sound profiles. The red nozzle emphasizes a deeper, more spacious bass presentation, while the black nozzle offers a more precise sound with enhanced high-frequency detail. The detachable 0.78 mm 2-pin cable is made from 6N single-crystal copper, silver-plated and treated cryogenically at -192 °C.

The interchangeable connector system includes 3.5 mm single-ended, 4.4 mm balanced and USB Type-C DSP connectors. The Type-C connector features a BES3001-SP audio decoding chip, supports up to 32-bit/384 kHz PCM and provides an 8-band parametric EQ accessible through the FiiO Control app for Android or the web interface. The Type-C connector does not support UAC 1.0 devices such as Xbox, Nintendo Switch and PlayStation consoles.

The OAK NANO comes with a custom-designed carrying case and 22 pairs of ear tips in three designs, offering a choice of fit and sound characteristics. It is Hi-Res Audio certified by the Japan Audio Society and the Consumer Electronics Association.

Features
13.8 mm dynamic driver with beryllium-alloy diaphragm
CNC-machined pure titanium housing with PVD coating
W-shaped diaphragm with independent surround
High-flux external magnet with up to 1.5 T magnetic flux density
Pure copper voice coil
Acoustic prism front chamber for phase correction
Airflow-controlled, damped rear chamber
Two interchangeable tuning nozzles: red and black
Cryogenically treated, silver-plated 6N single-crystal copper cable
Detachable 0.78 mm 2-pin cable connection
Interchangeable 3.5 mm, 4.4 mm and USB Type-C connectors
USB Type-C DSP connector with BES3001-SP decoding chip
USB Type-C supports up to 32-bit/384 kHz PCM
8-band parametric EQ via Android app or web interface
Hi-Res Audio certified

In The Box
FiiO OAK NANO in-ear headphones
Detachable cable
3.5 mm single-ended interchangeable connector
4.4 mm balanced interchangeable connector
USB Type-C DSP interchangeable connector
22 pairs of ear tips in three designs: FiiO HS20, FiiO HS18 and SpinFit CP360
Custom-designed carrying case