FiiO FX15 Monitor

A tribrid system combines three different driver technologies—a dynamic driver for punchy bass, a balanced armature for midrange clarity, and four electrostatic drivers for ultra-high frequency detail. This combination allows the FX15 to reproduce a wider spectrum of sound with greater precision than a single-driver earphone.

The physical switch on the earphone housing allows you to toggle the four electrostatic drivers on or off. This is useful for comparing the sound signature with and without the extra high-frequency extension, helping you decide which profile suits your current music or personal preference.

Yes, the shell is 3D-printed with an ergonomic, contoured shape designed to sit securely in the ear. At only 6 grams per unit, they are lightweight enough to remain comfortable during extended listening periods.

With an impedance of 24 Ohms and a sensitivity of 103dB, the FX15 is relatively easy to drive. While you can use them directly with a phone or laptop, pairing them with a dedicated DAC or amplifier will help you get the most out of their high-resolution capabilities.

The FX15 uses an expanded MMCX connector for the earphone end, which offers a more secure and durable connection than standard MMCX. The other end features a twist-lock system that lets you easily swap between different audio plugs, such as 3.5mm or balanced connections.

The patented S.Turbo design is an internal acoustic structure that acts like a turbocharger for the dynamic driver. It effectively filters out unnecessary high frequencies from the bass driver, resulting in cleaner, more impactful low-end performance without muddying the mids.