The FH3 Lumi is a hybrid in-ear monitor built around vocals. Rather than chasing maximum detail or bass impact, it is tuned for the warm, rich character of classic CD and cassette playback, with the midrange brought forward so singers sit naturally in the mix and stay easy on the ear over long sessions. If you listen mainly to vocal-led music and want an analogue-leaning presentation from a compact wired earphone, this is the FiiO model aimed squarely at you.
Driver Array
Each earpiece carries a 10mm dynamic driver paired with two custom balanced armature drivers that handle the mids and treble. The dynamic driver uses a natural cashmere-wood fibre composite diaphragm made with traditional papermaking techniques: ground plant fibres are blended with wool to balance rigidity and flexibility, the aim being a diaphragm that reproduces the warmth and texture of the human voice without a cold, synthetic edge. The crossover points are set around the vocal-critical bands so the three drivers hand over smoothly through the region that matters most, and the rear chambers and diaphragm materials of the balanced armatures are specified to expand the mids while preserving treble detail and extension.
Co-Created Retro Tuning
FiiO invited experienced listeners to take part in the tuning, studying the sonic character of classic CD players and cassette decks and refining the response across more than twenty rounds of iteration. The result is a warm, atmospheric soundstage with effortless vocals that remain comfortable for hours of listening.
Sibilance Control
Harsh sibilants are the enemy of a vocal-focused earphone. The FH3 Lumi pairs a precision filter circuit with an electronic active notch filter to isolate and suppress the 6 to 8kHz sibilance band, while leaving the extension and detail above 8kHz intact.
Design and Cable
The faceplates carry a 3D embossed deer motif with a silver shimmer, giving the earpieces the look of a small art piece. The detachable cable uses high-purity oxygen-free copper conductors with 0.78mm 2-pin connectors and a right-angled gold-plated 3.5mm plug. The FH3 Lumi is Hi-Res Audio certified, meeting the standards set by the Japan Audio Society and the Consumer Technology Association.
In the Box
Supplied with the 2-pin 3.5mm cable, three pairs of balanced ear tips (S/M/L, one pair pre-fitted), three pairs of vocal ear tips (S/M/L), a carrying case and a quick start guide.