1. Product Overview
The FiiO A1 is a compact and portable headphone amplifier designed to enhance the audio output from various devices such as smartphones, tablets, and computers. It features a durable anodized aluminum chassis and a self-powered amplifier, allowing for improved sound quality and volume levels for your headphones.
- Compact Design: Extremely small and lightweight for maximum portability.
- Durable Construction: Anodized aluminum chassis provides robust protection.
- Self-Powered Amplifier: Enhances audio signal without drawing power from the source device.
- Rechargeable Battery: Can be charged during use, offering extended listening time.

Figure 1: FiiO A1 Portable Headphone Amplifier, showcasing its compact silver design.
2. Package Contents
Please ensure all items are present in the package:
- FiiO A1 Headphone Amplifier
- USB Charging Cable
- 3.5mm Audio Cable (short)
- 3.5mm Audio Cable (long)
- Removable Clear Clip (2 pieces)
3. Device Layout

Figure 2: Top view of the FiiO A1, highlighting the control buttons and audio jacks.
- Power/EQ Button: Used to power on/off the device and cycle through equalizer modes.
- Volume Up Button (+): Increases the audio output volume.
- Volume Down Button (-): Decreases the audio output volume.
- Headphone Output (3.5mm): Connect your headphones here.
- Audio Input (3.5mm): Connect your audio source (e.g., smartphone, MP3 player) here.
- Micro USB Port: Used for charging the amplifier.
- LED Indicator: Displays power status, charging status, and current EQ mode.
4. Setup
4.1 Charging the Amplifier
Before first use, fully charge the FiiO A1. Connect the supplied USB charging cable to the Micro USB port on the amplifier and the other end to a USB power source (e.g., computer USB port, USB wall adapter). The LED indicator will show charging status.
- Charging Time: Approximately 1.5 hours for a full charge.
- LED Status: Red light indicates charging; blue light indicates fully charged.
4.2 Connecting to Audio Source and Headphones
- Connect one end of the 3.5mm audio cable to the audio output jack of your source device (e.g., smartphone, tablet, computer).
- Connect the other end of the 3.5mm audio cable to the Audio Input (3.5mm) port on the FiiO A1.
- Connect your headphones to the Headphone Output (3.5mm) port on the FiiO A1.

Figure 3: Illustrates the connection points for audio input and headphone output on the FiiO A1.
5. Operating Instructions
5.1 Power On/Off
- To power on, press and hold the Power/EQ Button for approximately 2 seconds until the LED indicator lights up.
- To power off, press and hold the Power/EQ Button for approximately 2 seconds until the LED indicator turns off.
5.2 Adjusting Volume
- Press the Volume Up Button (+) to increase the volume.
- Press the Volume Down Button (-) to decrease the volume.
5.3 Equalizer (EQ) Modes
The FiiO A1 features four distinct EQ modes to tailor the sound to your preference. Press the Power/EQ Button briefly to cycle through the modes. The LED indicator will change color to denote the active EQ mode.
- Mode 1 (Blue LED): Flat EQ - Provides a neutral audio amplification without any frequency adjustments.
- Mode 2 (Green LED): Bass 1 EQ - Offers a moderate bass boost, enhancing low-frequency response.
- Mode 3 (Red LED): Bass 2 EQ - Provides a stronger bass boost for more pronounced low-end.
- Mode 4 (Blue & Red Flashing LED): Bass 3 EQ - Applies a slight attenuation, potentially for specific audio profiles or headphones.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the amplifier. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Clip Replacement: The clear plastic clip is removable and replaceable. Extra clips are provided in the package.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume. |
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| Distorted sound. |
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| Hissing or static noise. |
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| Amplifier not charging. |
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8. Specifications
| Feature | Detail |
|---|---|
| Model Name | A1 |
| Dimensions | 0.94 x 3.99 x 4.19 cm |
| Weight | 20.13 g (0.71 Ounces) |
| Material | Aluminum |
| Connectivity Technology | Wired |
| Headphones Jack | 3.5 mm Jack |
| Amplifier Type | Solid State |
| Output Wattage | 5 Watts |
| Power Source Type | Battery Powered |
| Battery Capacity | 160mAh (Lithium Ion) |
| Frequency Response | 20Hz - 20kHz |
| Recommended Earphone Impedance | 16 - 100 ohms |
9. Warranty and Support
9.1 Warranty Information
The FiiO A1 Portable Headphone Amplifier typically comes with a 1-year limited warranty from the date of purchase. This warranty covers manufacturing defects and workmanship. Please retain your proof of purchase for warranty claims. For specific warranty terms and conditions, refer to the warranty card included with your product or visit the official FiiO website.
9.2 Customer Support
For technical assistance, troubleshooting, or general inquiries about your FiiO A1, please visit the official FiiO website or contact their customer support channels. Detailed contact information can usually be found on the manufacturer's website or in the product packaging.





