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FiiO FX15 (2023) Hi-Res 1DD+1BA+4EST Tribrid IEM Earphone Sonion Electrostatic Drivers + Knowles Balanced Armature + DLC Dynamic Driver

> Sonion Electrostatic Drivers
> 10mm DLC Dynamic Driver
> Custom High-precision DLP-3D Printed Shell
> Interchangeable Audio Plugs
> MMCX Detachable Cable (8 strands, 224 wires)
> Electrostatic ON/OFF Switch
> "Sound & Form" Harmonic Design
> Patented S.Turbo Acoustic Design
> Hi-end Specially-Tuned Frequency Response Curve
> Hi-Res Audio Certified

Electrostatic IEMs are no longer a novelty in the high-end IEM landscape, but the FX15 is FiiO's first foray into producing such a product. When developing the FX15, the FiiO R&D team spent much time researching how best to utilize electrostatic drivers. Due to the low sensitivity of such drivers, special care must be taken to ensure they are not overpowered by the other dynamic and BA drivers in use. Otherwise, listeners will not be fully able to experience the unique sound that electrostatic drivers bring to the table.

[FiiO FX15 Specifications]

Headphone type: Dynamic BA Electrostatic Tribrid IEMs
Wearing Method: In-ear, around-the-ear
Drivers: Knowles BA (1), 10mm DLC Dynamic Driver (1), Sonion EST Driver (4)
Frequency Response: 20Hz-40kHz
Impedance: 24 ohms @ 1kHz
Sensitivity: 103dB/mW @ 1kHz
Cable: 8 strands totaling 224 wires of high-purity silver
Cable Length: about 1.2m
Ear unit weight: about 6g (not including cable)
Earphone Connector: Expanded MMCX
Audio Plug: Twist-lock interchangeable plugs (included 4.4mm BAL and 3.5mm S-E)