1. Introduction
This manual provides detailed instructions for the FiiO Q3-MQA Portable High-Resolution DAC and Headphone Amplifier. The Q3-MQA is designed to enhance audio quality from various sources, offering high-resolution audio decoding and powerful amplification in a compact form factor. Please read this manual thoroughly before using the device to ensure proper operation and to maximize your listening experience.

Image 1.1: Front view of the FiiO Q3-MQA Portable DAC and Amplifier. This device is a compact, black rectangular unit with the FiiO logo and "Hi-Res AUDIO" certification visible on its surface, indicating its capability for high-fidelity sound reproduction.
2. Product Overview
The FiiO Q3-MQA is a versatile portable DAC and amplifier featuring advanced audio technologies. Key features include:
- MQA Decoding Support: Fully supports MQA format decoding, allowing for the rendering of MQA files when used with compatible players.
- High-Resolution Audio: Supports PCM up to 384kHz/32-bit and DSD256.
- Multiple Headphone Outputs: Equipped with 2.5mm balanced, 3.5mm single-ended, and 4.4mm balanced headphone outputs for broad compatibility.
- Dual THX AAA-28 Amplifiers: Provides a maximum power output of 330mW (370mW in Line-in mode) into 32Ω.
- Long Battery Life: Features an 1800mAh battery, offering over 23 hours of battery life via AUX In and over 12 hours via USB In.
- Portable Design: Compact and lightweight, measuring approximately 105mm x 59mm x 12.5mm and weighing about 110g.

Image 2.1: Top view of the FiiO Q3-MQA showing its three headphone outputs. From left to right, these are the 3.5mm single-ended output, 2.5mm balanced output, and 4.4mm balanced output, providing versatile connectivity options for various headphones.

Image 2.2: A visual representation of the MQA logo, indicating that the FiiO Q3-MQA supports MQA (Master Quality Authenticated) decoding. This feature allows for the playback of high-resolution audio files encoded with MQA technology.
3. Setup
Follow these steps to set up your FiiO Q3-MQA for use with various devices.
3.1 Package Contents
The FiiO Q3-MQA package includes the following accessories:
- Lightning to Type C cable (x1)
- Type C to Type C cable (x1)
- USB A to Type C data cable (x1)
- 3.5mm to 3.5mm audio cable (x1)
- Silicone bands for stacking (x2)
- Silicone pad (x1)
- Carrying pouch (x1)

Image 3.1: An overview of the accessories included with the FiiO Q3-MQA. This image displays various cables (Lightning to Type C, Type C to Type C, USB A to Type C, 3.5mm audio cable), silicone bands, a silicone pad, and a carrying pouch, highlighting the comprehensive set of items provided for immediate use.
3.2 Connecting to a Computer (Charging On)
When connecting the Q3-MQA to a computer, ensure the "CHARGE" switch on the bottom of the device is set to "ON". This allows the Q3-MQA to draw power from the computer while functioning as a DAC/amplifier.

Image 3.2: The FiiO Q3-MQA connected to a laptop via a USB-C cable. The image highlights the "CHARGE ON" setting, indicating that the device is receiving power from the computer while operating as an external DAC and amplifier.
3.3 Connecting to Smartphones (Charging Off)
When connecting the Q3-MQA to a smartphone, set the "CHARGE" switch on the bottom of the device to "OFF". This prevents the Q3-MQA from drawing power from your smartphone, conserving your phone's battery life. The Q3-MQA will use its internal battery for power.

Image 3.3: The FiiO Q3-MQA connected to a smartphone via a USB-C cable. The image emphasizes the "CHARGE OFF" setting, ensuring the Q3-MQA operates on its own battery to avoid draining the connected smartphone's power.
4. Operating Instructions
4.1 Power On/Off and Volume Control
The Q3-MQA features an integrated volume knob that also serves as the power switch. Rotate the knob clockwise to power on the device and increase volume. Rotate counter-clockwise to decrease volume and power off the device.

Image 4.1: A close-up of the FiiO Q3-MQA's volume knob, illustrating its ADC (Analog-to-Digital Converter) volume adjustment capability. Arrows indicate the rotational movement for increasing or decreasing the audio output level.
4.2 Gain and Bass Boost Settings
The Q3-MQA includes switches for adjusting gain levels and enabling bass boost, located on the bottom of the device.
- GAIN Switch: Toggles between low and high gain settings. Use high gain for headphones that require more power or for a louder output.
- BASS Switch: Activates or deactivates the bass boost function, allowing you to tailor the low-frequency response to your preference.

Image 4.2: The bottom panel of the FiiO Q3-MQA, showing the "BASS" and "GAIN" switches. These controls allow users to adjust the bass enhancement and output gain levels, providing customization for different audio preferences and headphone sensitivities.
4.3 MQA Indicator
When playing MQA content, the indicator light on the Q3-MQA will change color (typically magenta) to confirm that MQA decoding is active and the device is rendering the MQA file correctly.
4.4 Battery Management
The Q3-MQA features an 1800mAh battery. To optimize battery life and charging:
- Use the "CHARGE" switch to control power draw from connected devices.
- Battery life is approximately 23 hours when using AUX In and 12 hours when using USB In.
- Charge the device using the provided USB-C cable connected to a power source (e.g., computer USB port, USB wall adapter).
5. Maintenance
To ensure the longevity and optimal performance of your FiiO Q3-MQA, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using harsh chemicals, solvents, or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Handling: Handle the device with care to prevent physical damage. Avoid dropping or subjecting it to strong impacts.
- Battery Care: For optimal battery health, avoid fully discharging the battery frequently. If storing for an extended period, charge the battery to about 50% and recharge every few months.
6. Troubleshooting
If you encounter issues with your FiiO Q3-MQA, refer to the following common troubleshooting steps:
- No Sound Output:
- Ensure the Q3-MQA is powered on and the volume is turned up.
- Verify that headphones are securely connected to the correct output port (2.5mm, 3.5mm, or 4.4mm).
- Check the connection cable between the Q3-MQA and your source device (computer, smartphone).
- Confirm that the source device's volume is not muted or too low.
- If using USB input, ensure the necessary drivers are installed on your computer (available on the FiiO website).
- Poor Sound Quality:
- Check the audio source file quality.
- Ensure all cables are securely connected and undamaged.
- Try different headphones to rule out headphone issues.
- Adjust the GAIN switch to match your headphones' impedance and sensitivity.
- Disable BASS boost if the sound appears muddy or distorted.
- Device Not Recognized by Computer/Smartphone:
- Ensure the USB cable is functioning correctly and securely connected.
- For computers, install the latest USB DAC drivers from the FiiO official website.
- For smartphones, ensure the "CHARGE" switch is set to "OFF" to prevent power conflicts.
- Try connecting to a different USB port or a different device.
- Battery Not Charging or Draining Quickly:
- Ensure the "CHARGE" switch is set to "ON" when charging from a computer or power adapter.
- Use the provided USB-C cable for charging.
- If connected to a smartphone, ensure the "CHARGE" switch is "OFF" to prevent rapid phone battery drain.
- If the issue persists, contact FiiO customer support.
7. Specifications
Detailed technical specifications for the FiiO Q3-MQA Portable DAC and Headphone Amplifier:
| Feature | Specification |
|---|---|
| Model | Q3 MQA |
| DAC Chip | AK4452 |
| Headphone Amplifier | THX AAA-28 (x2) |
| Decoding Support | PCM up to 384kHz/32-bit, DSD256, MQA |
| Headphone Outputs | 2.5mm Balanced, 3.5mm Single-ended, 4.4mm Balanced |
| Output Power (32Ω) | Single-ended (PO): ≥160mW Balanced (BAL, UAC mode): ≥330mW Balanced (BAL, Line in mode): ≥370mW |
| Battery Capacity | 1800mAh Lithium Polymer |
| Battery Life (Approx.) | AUX In: >23 hours USB In: >12 hours |
| Dimensions (L x W x H) | 105mm x 59mm x 12.5mm (4.1 x 2.3 x 0.5 inches) |
| Weight | Approximately 110g (3.88 ounces) |
| Material | Aluminum Alloy (based on product images and general FiiO construction) |

Image 7.1: A graphic displaying key specifications of the FiiO Q3-MQA Amplifier, including its model, DAC chip (AK4452), headphone amplifier (THX AAA-28), decoding support (PCM384k/DSD256/MQA), and various output power ratings for different headphone connections.

Image 7.2: A diagram illustrating the dimensions (length, width, height) and approximate weight of the FiiO Q3-MQA. The device measures approximately 4.1 inches in length, 2.3 inches in width, and 0.5 inches in thickness, with a weight of about 110g, emphasizing its compact and portable nature.
8. Warranty and Support
FiiO products typically come with a limited warranty. For specific warranty terms, duration, and conditions, please refer to the warranty card included with your product or visit the official FiiO website. Keep your proof of purchase for warranty claims.
For technical support, driver downloads, or further assistance, please visit the official FiiO support page or contact their customer service directly. You can often find updated firmware and FAQs on their website.
Official FiiO Website: www.fiio.com





