FiiO FT15 | Open-Back Planar Magnetic Headphones

FiiO FT15 Features a Diamond-Coated Nano-Diaphragm Planar Magnetic Driver with Premium American Walnut Wood Ear Cups

800nm Ultra-Thin Diaphragm for Greater Sensitivity
FiiO Proprietary Planar Technology
95dB/mW High-Sensitivity Easy-to-Drive Design
Liquid-Nitrogen-Treated 6N Mono Crystalline Copper Cable


Advanced Engineering
FT15's diaphragm thickness drops from the previous generation's 6 microns to a breakthrough 800 nanometers, 86.7% thinner than its predecessor. This nanometer-scale thinness approaches the physical limits of the material, representing the current state of the art in the industry. A thinner diaphragm means better sound, across the board:
ResolutionWith nanometer-level diaphragm precision, the FT15 achieves faster transient response. Even subtle signals in the high and ultra-high frequencies can be reproduced with greater precision and accuracy.
FidelityThe diaphragm follows the signal closely and moves with precision, starting and stopping in sync with the signal with minimal residual ringing. The result is an exceptionally clean and refined sonic character.
Listening ComfortThe ultra-thin diaphragm delivers greater compliance and lower distortion, producing smooth, refined highs that remain comfortable even over long listening sessions.

Innovative Diamond Coating
The FT15 incorporates FIIO's self-developed patented multi-layer coating technology. The voice coil features a silver-aluminum alloy coating to enhance its mechanical performance and conductivity, while the diaphragm employs an innovative full-surface diamond coating. Using a highly sophisticated manufacturing process, this design brings the unique physical properties of diamond into the acoustic field.
Proprietary Planar Technology
FT15 features a groundbreaking 800nm ultra-thin diaphragm and FIIO’s first diamond-coating process, capturing even the finest nuances in the music. A specially refined patented magnetic circuit applies force to the diaphragm more evenly and powerfully, reducing vibrational distortion. The result is deep, solid bass, refined and easy-to-listen mid-to-high frequencies, and an overall warm, natural sound.
Thoughtfully Selected Materials
The FT15's center frame is crafted from North American FAS-grade black walnut, a wood commonly used in luxury car interiors, fine furniture, and premium musical instruments. Each pair is meticulously finished and polished to preserve the wood's natural grain, resulting in a piece that's as much a collectible as it is a pair of headphones, where musical craftsmanship meets fine woodworking.