FiiO FH3 Black Ear Loop headphones

FiiO FH3 — Hybrid Triple-Driver IEM for Audiophile Listening

The FiiO FH3 in-ear monitor pairs a 10mm beryllium-plated dynamic driver with two Knowles balanced armatures inside a closed-back CNC-machined aluminum-magnesium shell. A pure audiophile IEM with no microphone and no active noise cancellation, it focuses entirely on sound quality. Hi-Res Audio certified, it reaches 10 Hz to 40 kHz, reproducing everything from sub-bass rumble to airy treble. A physical + electronic three-way crossover keeps bass, mids, and highs cleanly separated. At 24Ω and 114 dB sensitivity, the IEM scales from a smartphone to a dedicated DAP.

What Sets the FH3 Apart in Its Class

Patented S.TURBO acoustic design routes the dynamic driver's output through longer turbine-inspired sound tubes that filter unwanted high-frequency harmonics, producing deeper bass without smearing the mids. FiiO's balanced pressure relief technology equalizes air pressure between front and rear chambers, keeping dynamics intact during long sessions. The included monocrystalline silver-plated copper cable — 4 strands of 96 wires — is a step above the typical stock cable at this tier.

Driver Configuration and Technical Specs

Three drivers, three frequency bands, one cohesive sound. The DD handles lows, the Knowles ED-30262 covers mids, and the Knowles RAD-33518 delivers highs — with the high-frequency BA placed closer to the ear to minimize treble reflections.

• Driver Setup: 10mm beryllium-plated DD + 2 Knowles BA — dedicated drivers for bass, mids, and treble
• Frequency Response: 10 Hz – 40 kHz — Hi-Res certified bandwidth
• Impedance: 24 Ω @ 1 kHz — easy to drive from a phone or portable DAC
• Sensitivity: 114 dB @ 1 mW — reaches comfortable volume without high-power sources
• Cable & Shell: Monocrystalline silver-plated copper cable, MMCX, 3.5 mm L-bend; aluminum-magnesium alloy, 7.3 g per side

Who Should Pick the FH3

This IEM is the right choice for listeners stepping into the audiophile world who want a warm, full-bodied signature without sacrificing detail. Bass lovers will appreciate the dynamic driver's weight and texture; vocal-focused listeners will enjoy the slightly forward midrange. Easy drivability means smartphone users can plug in and enjoy, though a dedicated source unlocks tighter imaging. With 11 pairs of eartips included, finding a secure seal — and the right sound — is straightforward.