FiiO
FT15
FiiO launches FT15 open-back planar over-ear headphones
FiiO has introduced a new open-back model in its planar headphone range. The FT15 builds on the planar-driver technology used in the FT5.
Georg S. Kuklick
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FiiO has introduced the FT15 planar over-ear headphones. The open-back model uses 101 mm drivers with an 800 nm diaphragm and was available by 17 September 2026.
The diaphragm has a proprietary diamond coating across its entire surface, while each driver has an effective radiating area of 6,443.5 mm². The driver assembly uses a patented uniform magnetic-field design. Its voice coil is electroplated using a 28 nm chip-manufacturing process, and the headphones have a sensitivity of 95 dB/mW and an impedance of 24 ohms.
The earcups are made from FAS-grade North American black walnut, paired with a carbon-fibre headband. The headphones weigh 425 g. Two sets of earpads are included, along with a storage carrier.
The supplied cable uses 6N single-crystal copper that has been cryogenically treated with liquid nitrogen. It terminates in a 4.4 mm plug, with 6.35 mm and four-pin XLR adapters also included in the package.
Key specifications
Headphone format | Over-ear |
|---|---|
Acoustic design | Open-back |
Driver type | Planar magnetic |
Driver diameter | 101 mm |
Diaphragm thickness | 800 nm |
Diaphragm coating | Proprietary full-surface diamond coating |
Effective radiating area | 6,443.5 mm² |
Magnetic-field design | Patented uniform magnetic field |
Voice-coil manufacturing | Electroplating using a 28 nm chip-manufacturing process |
Sensitivity | 95 dB/mW |
Impedance | 24 ohms |
Cable | Cryogenically treated 6N single-crystal copper |
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