It is NOT compatible with UTWS3 and UTWS5 modules. 

The FiiO FD11 are FiiO's new in-ear headphones with a 10mm dynamic driver, made with liquid die-cast zinc alloy construction. 

It mounts asymmetrical internal and external magnetic circuits to give rise to a tuned frequency response with high-resolution audio certification. Its design highlights the capsule finished in silver and with a rounded shape, to fit perfectly in the ear and enjoy your favorite songs at full capacity.

The FiiO development team has designed the FD11 as part of the new "Bionic Conch" series of products which aims to exceed expectations in both aesthetics and sound.

It stands out for its sound profile focused on the dynamic timbre of the driver, with special attention to vocals and genres such as folk, ACG and other styles of music. 

For the FD11's 10mm carbon-based dynamic driver, the FiiO team chose to use the same materials found in the high-end FH15 and FF5 models, giving the FD11 a big boost to its sonic capabilities. The carbon-based material is ideal for the diaphragm as it is lighter than aluminum, beryllium and other materials with a tensile strength nine times that of steel.

The carbon-based diaphragm results in a detailed, highly responsive driver to easily drive fast transients with minimal distortion thanks to minimal breakup. 

The FD11 uses N52 neodymium magnets which give the headset its 111dB/mW@1kHz sensitivity. In simulation tests compared with the single external magnetic circuit of the typical dynamic driver, the FD11's dual asymmetric internal and external magnetic circuits not only exhibit higher magnetic density but also exhibit a wider magnetic field. This means the FD11 handles highly dynamic audio with ease and with lower distortion than typical in its class.

The rear of the FiiO FD11 dynamic driver features a unique double-layer cavity. This allows the internal construction to precisely control airflow, reduce distortion, and allow the diaphragm to move freely. 

This results inmore detailed highs, and above all, more robust and higher-resolution bass, with a driver that faithfully reproduces low-frequency details at maximum speed.

Compared to the FD1, the FiiO FD11 is completely manufactured with high-end materials and techniques to make them stronger and more durable in daily use. Thanks to the die-cast shape, the inner surface of the FD11 is slightly uneven, enough to reduce the convergence of sound waves and result in the purest sound.

For its part, in addition to the new conch shape of the FiiO FD11, theC-shaped acoustic fluteinside the headphones serves to improve sound quality; This function focuses specifically on the bass.

Going into the small details, the shape of the FD11 is specifically designed to optimize the contact area between the earphone and the human ear, forming a triangular support structure so that it remains secure in your ear no matter the situation.

The FiiO FD11 uses a0.78mm dual-pin cable, allowing you to easily upgrade your listening experience. The elbow-shaped headphone jack is also curved to make it easier to use and more comfortable to wear.

The FD11 is High Resolution Audio Certified, as established by the JAS and Consumer Electronics Association (CEA). 

• 1 x Headphones
• 1 x Cable 3.5mm - 2 pin
• 3 x Balanced silicones S,M and L
• 1 x User Manual

Specifications