FiiO K3 Quick Start Guide

Buttons and Ports Labeled

The FiiO K3 features several ports and controls for audio output and operation.

Top Panel:

• 2.5mm TRRS balanced headphone output
• Bass switch
• Gain switch

Front Panel:

• 3.5mm headphone output
• Power/Volume knob

Back Panel:

• Type C USB port
• USB mode switch with options for: Line Out, USB AUDIO 1.0, USB AUDIO 2.0, Coax Out, Opt Out.

Operation Explained

1. Power on/off

Turn the "Power/Volume" knob until a click sound is heard to turn on the device. To increase volume, continue turning clockwise. To decrease volume, turn anticlockwise. Turn anticlockwise until a click sound is heard to turn off the device.

Indicator

The RGB light indicates the current status of the device, changing color based on the music playing.

Notes:

1. The RGB light changes color only when music is playing.
2. When using Line Out, volume can be adjusted by the K3. It is normal to get output from both the Line Out and headphone out simultaneously; please unplug your headphone when using Line Out if separate output is desired.
3. When using Optical Out, volume cannot be adjusted by the K3. It is normal to get output from both the Optical Out and headphone out simultaneously; please unplug your headphone when using Optical Out if separate output is desired.
4. If headphones are connected to both the 3.5mm and 2.5mm headphone outputs, the 2.5mm TRRS balanced headphone output takes priority.

USB DAC

The K3 supports two shifts of USB Audio: USB Audio-1.0 (driver-free) and USB Audio-2.0.

• Switch to USB 2.0: When using the device with a Windows computer for the first time, please visit the FiiO website to download the driver and follow the installation instructions. Download link: https://www.fiio.com/supports. For MAC OS computers, no drivers are needed; simply select the K3 as the output device.
• Switch to USB 1.0: No driver installation is required. Simply select the K3 as the output device.

Note: It is recommended to set the system output volume on your computer to the maximum level and then adjust the output volume of the K3 using its volume knob to a suitable level.

After switching between USB 1.0/2.0, it is required to unplug and replug the USB cable to re-establish the connection.

Precautions

• ? In case of system error, please try unplugging and replugging the USB cable to resume normal operation.
• ? Please set the volume with moderation (especially when using Line Out) to protect your hearing and your audio equipment.
• ? Please remove headphones from your ears before plugging or unplugging them to avoid any sudden loud sounds that could damage your hearing.
• ⚠️ Do not disassemble, expose the unit to water, or attempt unauthorized repairs.
• ⛑️ Your hearing and environmental awareness are affected when using headphones. For your own safety, do not use headphones in dangerous environments.

List of Items Included in Package

(Please check to ensure all items are included)

• USB data cable*1
• Quick user guide*1
• Anti-slip tape*4
• Warranty card*1

Learn More

For more product information, please visit the official FiiO website: www.fiio.com.

WEEE Directive & Product Disposal

[Recycling Symbol] At the end of its serviceable life, this product should not be disposed of as household or general waste. It should be handed over to the applicable collection point for the recycling of electrical and electronic equipment, or returned to the supplier for disposal.

Internal/Supplied Batteries: This symbol on the battery indicates that the battery is to be collected separately. This battery is designed for separate collection at an appropriate collection point.