E12DIY - Headphones FiiO - Free user manual and instructions
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| Product Type | Portable Headphone Amplifier |
| Brand | FiiO |
| Model | E12DIY |
| Amplifier Type | Class A/AB Hybrid |
| Output Power | 880mW @ 32Ω (per channel) |
| Frequency Response | 5Hz – 80kHz (±0.5dB) |
| Signal-to-Noise Ratio | ≥ 115dB |
| THD+N | < 0.003% |
| Input Impedance | 10kΩ |
| Recommended Headphone Impedance | 16Ω – 300Ω |
| Gain Settings | Low (0dB) / High (10dB) |
| Bass Boost | +6dB @ 100Hz (switchable) |
| Input Connection | 3.5mm stereo jack |
| Output Connection | 3.5mm stereo jack (line out / headphone out) |
| Power Source | Built-in rechargeable Li-ion battery (2200mAh) |
| Battery Life | Up to 15 hours (depending on load and volume) |
| Charging | Micro USB, DC 5V/2A |
| Dimensions | 105 x 62 x 19 mm |
| Weight | 197 g |
| Cleaning Instructions | Wipe with a soft, dry cloth. Do not use liquids or abrasives. |
| Safety Warnings | Avoid high volume to prevent hearing damage. Do not expose to moisture or extreme temperatures. |
| Repair and Spare Parts | Not user-serviceable. Contact FiiO support for service. |
| Accessories Included | USB charging cable, 3.5mm audio cable, rubber bands, user manual |
Frequently Asked Questions - E12DIY FiiO
What is the FiiO E12DIY?
The FiiO E12DIY is a portable headphone amplifier designed to enhance the audio output of your portable devices, such as smartphones and MP3 players. It features a Class A/AB hybrid amplifier with adjustable gain and bass boost.
How do I charge the E12DIY?
Connect the included Micro USB cable to the amplifier and a standard USB power adapter (5V/2A). The LED indicator turns blue during charging and turns off when fully charged. Charging time is approximately 3-4 hours.
What is the battery life of the E12DIY?
The built-in 2200mAh battery provides up to 15 hours of playback time under normal conditions. Actual battery life may vary based on headphone impedance, volume level, and gain setting.
How do I switch between gain levels?
The E12DIY has a physical Gain switch on the side. Set to Low for sensitive earphones (default) and High for harder-to-drive headphones (above 100Ω). Always start with Low gain to avoid distortion.
Can I use the E12DIY with any headphone?
Yes, it works with most headphones having a 3.5mm plug and impedances from 16 to 300 ohms. For very high-impedance headphones (>300Ω), consider a more powerful desktop amplifier.
How do I clean the E12DIY?
Turn off the device and disconnect all cables. Wipe the exterior with a soft, dry cloth. Do not use alcohol, solvents, or abrasive cleaners, and avoid getting moisture into the ports.
What does the bass boost do?
The Bass Boost switch increases low frequencies by about 6dB at 100Hz. It adds extra punch to your music, ideal for genres like electronic or hip-hop. Turn it off for a more neutral sound.
Is the E12DIY compatible with smartphones?
Yes, connect your smartphone via the 3.5mm audio out to the line input of the E12DIY. For best performance, use a high-quality cable. Some smartphones may require a USB-C to 3.5mm adapter.
What should I do if the device doesn't power on?
Ensure the battery is charged. If the device still doesn't turn on, try a different Micro USB cable and power source. If it remains unresponsive, contact FiiO support for assistance.
Can I use the E12DIY while charging?
Yes, the E12DIY can be used while connected to a power source. However, for optimal battery longevity, avoid leaving it plugged in continuously for extended periods.
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USER MANUAL E12DIY FiiO
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Product information
Brand : FiiO
Model : E12DIY
Category : Headphones