FiiO FH19

The FIIO FH19 is a hybrid in-ear monitor with a push-pull dual dynamic driver unit and six Knowles balanced armature drivers per ear. It has a semi-open shell of titanium and 7000 series aluminum, expanded MMCX connectors, and a swappable-plug silver cable (3.5/4.4mm).
| Frequency response | 8 Hz – 40 kHz |
| Sensitivity | 109 dB/mW |
| Impedance | 16 Ω |
| Driver | 13.7 mm |
As stated by the manufacturer — not community data.
Plays straight from a phone
A phone or laptop reaches full listening level. An amp is a choice, not a requirement.
| Needs, for 110 dB peaks | 0.14 V · 1.3 mW |
| Phone or laptop (≈0.70 V, 20 mW) | Enough |
| Dongle DAC/amp (≈2.0 V, 120 mW) | Enough |
Worked out from the stated 109 dB/mW and 16 Ω — not a listening test.
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