The FiiO E3 is a compact earphone power amplifier designed to boost the output of multimedia players for high‑impedance headphones. It uses a single AAA battery and features a 3.5 mm standard audio jack.
This manual covers the main features, battery installation, package contents, important safety notices, technical specifications, and a troubleshooting guide to help users operate the device correctly. This manual is written in Chinese.
| Output Power | 70 mW (32 Ω), 12 mW (300 Ω) |
|---|---|
| Frequency Response | 10 Hz – 40 kHz |
| Signal‑to‑Noise Ratio | 80 dB (A‑weighted) |
| Total Harmonic Distortion | <0.5 % (1 kHz) |
| Headphone Impedance | 16 Ω – 300 Ω |
| Battery Type | Single AAA (7 mm) cell |
| Dimensions | 55 mm × 23 mm × 14.5 mm |
Use a single AAA battery and insert it with the correct polarity as shown in the installation diagram.
Make sure the audio source volume is turned up, the output volume on the E3 is increased, and all connections are secure.
Insert the headphones to power on (the indicator light turns red); remove them to power off (the light turns gray).