FiiO just launched the FT15, a pair of wired over-ear headphones featuring a 101mm planar driver with a diamond-coated diaphragm. FiiO says the FT15’s diaphragm is 800nm thick, compared to the 6μm diaphragm on the previous FT5. They went on sale in China on September 12, 2026, for $446 (2999 yuan).
Friends, by tradition, if a news post gets 100 likes, I get the model in hand and make a review for you. And of course subscribe to the review — I will email you the moment it goes live on MyChooz.
The FiiO FT15’s standout feature is its 800nm diamond coating on the diaphragm. FiiO claims this coating covers the entire diaphragm, offering high rigidity and a frequency response extending up to 40 kHz. For the coil, they’re using a 28-nanometer electroplating process, which the brand says virtually eliminates damage.
Sound. The 101mm driver offers an effective vibration area of 6443.5 mm². The magnets are specially shaped, and FiiO’s patent suggests this creates a uniform field that pulls the diaphragm equally across its entire surface. FiiO also claims significantly reduced harmonic distortion. While they have Hi-Res certification, that alone doesn’t tell you how they actually sound.
Power. With an impedance of 24 Ohms and a sensitivity of 95 dB/mW, FiiO suggests even a small USB DAC should be sufficient to drive these headphones.
Build. Weighing in at 425g, FiiO describes the FT15’s build as lightweight. The headband is made of carbon fiber, and the earcups are crafted from FAS-grade black walnut. The company promises they can be worn for 4 hours or more without causing pressure on your head.
Price and where to buy. You can find the FT15 on FiiO’s official website. Sales began in China at $446 (2999 yuan); the official page doesn’t mention availability outside China. The package includes a 6N liquid-nitrogen-treated monocrystalline copper 4.4 mm balanced cable, adapters for 6.35mm and XLR-4, two pairs of ear pads, and a linen carrying case. You’ll find the full specs further down.
Friends, let me know in the comments what you think of this new model and what you’d like to see covered in the review — I’ll do my best to answer everything.
What interests me most is how the 101 mm planar driver with diamond coating sounds and how the claimed range up to 40 kHz manifests. Second, is it true that such a planar driver can be powered by a USB DAC at 24 Ohms? And how will the FT15 stack up against the planar driver in Hifiman Sundara from our wired headphone ranking. I’ll check all this in the review if I get enough likes — that’s how I’ll know if the model is of interest to you.
Specifications FiiO FT15
Source: fiio.com
Every spec has been checked against the manufacturer's official source. No copy-pasting from the internet or AI-generated text.
Source: FiiO
