KGUSS Xduoo XD05 BASIC2 Portable DAC Headphone Amplifier User Manual

1. Product Overview

The KGUSS Xduoo XD05 Basic2 is a versatile and compact Digital-to-Analog Converter (DAC) and headphone amplifier designed for high-fidelity audio on the go or at your desk. It offers robust sound quality and flexible connectivity options for various audio setups.

Key Features:

• Powerful Decoding: Supports PCM 32Bit/384kHz, DSD256, and MQA 8x unfolding for detailed audio reproduction.
• High Output Power: Delivers up to 750mW per channel (32Ω load) with high/low gain settings, suitable for a wide range of headphones.
• Portable & Desktop Modes: Operates on battery (3.7V/3000mAh) for portable use or DC power for extended desktop listening.
• Bluetooth 5.4: Features LE-Audio 5.4 for faster transmission, lower latency, and improved sound, supporting LC3, LDAC, aptX Lossless, and more.
• Sound Customization: Includes onboard EQ and a +6dB bass boost switch to tailor the audio to your preferences.
• User-Replaceable Op-Amps: Allows for customization of sound quality by swapping amplifier chips.
• OLED Display: Provides real-time digital information flow for easy monitoring.

2. Parts and Controls

Familiarize yourself with the various inputs, outputs, and controls of your Xduoo XD05 Basic2.

Image: Front and rear views of the Xduoo XD05 Basic2, highlighting various ports and controls.

Front Panel:

• PHONE (6.35mm Headphone Out): Standard headphone output.
• BALANCED (4.4mm Balanced Headphone Out): Balanced headphone output for enhanced audio quality.
• VOL & INPUT (Red Knob): Multi-function knob for volume control and input selection.
• Power On/Off Switch: Toggles the device power.
• TURBO Switch: Adjusts output power gain.
• BASS Switch: Activates +6dB bass boost.
• OLED Display: Shows current input, sampling rate, volume, filter, and battery status.

Rear Panel:

• DC IN: Power input for external DC power supply (12V/3A or higher current).
• COAX/OPTI: Coaxial/Optical digital input (3.5mm).
• USB IN: USB Type-C input for connecting to computers or mobile devices.
• AUX IN/OUT: 3.5mm analog input/output.
• BAL IN/OUT: Balanced analog input/output.
• Power Selection Switch (CHARGE/BATT/EXT): Selects power source (Charge, Battery, External DC).

3. Setup and Connections

Properly connecting your Xduoo XD05 Basic2 to your audio source is crucial for optimal performance.

Connecting to a Computer (USB DAC Mode):

1. Ensure the Xduoo XD05 Basic2 is powered off.
2. Connect one end of the provided Type-C USB cable to the USB IN port on the XD05 Basic2.
3. Connect the other end of the USB cable to your computer (Windows, Linux, Mac OS X).
4. Turn on the XD05 Basic2.
5. On your computer, select the Xduoo XD05 Basic2 as the audio output device. For Windows systems, you may need to install a USB driver from the official Xduoo website. Mac OS systems typically do not require a driver.
6. Connect your headphones to either the 6.35mm or 4.4mm balanced output.

Connecting to Mobile Phones/Players (USB OTG Mode):

1. Ensure the Xduoo XD05 Basic2 is powered off.
2. Use a compatible USB OTG cable (Type-C to Type-C or Lightning to Type-C) to connect your mobile phone or player to the USB IN port on the XD05 Basic2.
3. Turn on the XD05 Basic2.
4. Connect your headphones to the appropriate output.

Connecting via Coaxial/Optical Input:

1. Connect a 3.5mm Coaxial/Optical cable from your audio source (e.g., CD player, digital audio player) to the COAX/OPTI port on the XD05 Basic2.
2. Press the INPUT button (red knob) to select the COAX/OPTI input.
3. Connect your headphones to the appropriate output.

Connecting via AUX Input:

1. Connect a 3.5mm audio cable from your analog audio source to the AUX IN/OUT port on the XD05 Basic2.
2. Press the INPUT button (red knob) to select the AUX input.
3. Connect your headphones to the appropriate output.

Bluetooth Connection:

1. Turn on the XD05 Basic2.
2. Press the INPUT button (red knob) to select Bluetooth input. The OLED display will show "BT".
3. On your mobile device or computer, search for Bluetooth devices and select "Xduoo XD05 Basic2" to pair.
4. Once paired, audio will stream wirelessly to the XD05 Basic2.

4. Operating Instructions

Learn how to use the various functions of your Xduoo XD05 Basic2.

Image: Close-up of the Xduoo XD05 Basic2 showing EQ and Digital Volume adjustment features.

Volume Control:

• Rotate the red knob (VOL & INPUT) clockwise to increase volume and counter-clockwise to decrease volume. The volume level (0-99) is displayed on the OLED screen.

Gain Adjustment:

• Use the TURBO switch to adjust the output power gain (+0dB/6dB) to match the impedance of your headphones.

Bass Boost:

• Flip the BASS switch to the right to activate a +6dB bass boost for enhanced low-end response.

Desktop and Portable Modes:

• The XD05 Basic2 can operate in two power modes: Battery (BATT) for portable use and External DC (EXT) for desktop use.
• Use the Power Selection Switch on the rear panel to select your desired mode. When connected to DC power, the device automatically disconnects Type-C power and supports battery charging.

Op-Amp Replacement:

The amplifier chips (op-amps) are user-replaceable, allowing for sound customization. Refer to the detailed instructions provided with replacement op-amps for proper installation.

Image: Close-up of an op-amp chip, illustrating the user-replaceable component.

5. Specifications

Detailed technical specifications for the Xduoo XD05 Basic2.

6. Troubleshooting

If you encounter any issues, please refer to the following common problems and solutions:

• Unit does not turn on:
  • Ensure the battery is charged.
  • Check if the Power Selection Switch is set to the BATT position.
  • If the battery life is significantly reduced, it may be nearing the end of its service life. Contact your dealer for replacement.
• Battery cannot be charged:
  • Verify that the charger specifications (12V/2A or higher current) are correct.
  • Ensure the Power Selection Switch is set to the CHARGE position.
  • Confirm the battery is not already fully charged.
• No sound:
  • Check that the unit and the audio device are connected correctly.
  • Ensure the connected device is turned on.
  • Turn up the volume on both the XD05 Basic2 and your connected device.
  • Verify that the correct input source is selected on the XD05 Basic2.
  • When connected to a computer, ensure the device settings on your computer are correct and that the XD05 Basic2 is selected as the audio output.

7. Maintenance and Care

To ensure the longevity and optimal performance of your Xduoo XD05 Basic2, follow these maintenance guidelines:

• Do not place the unit under direct sunlight or near heating equipment.
• Avoid placing the device in high-temperature or dusty environments. Do not spill liquids on it.
• Do not use chemical solvents to clean the device. Use a soft, dry cloth to wipe it.
• Turn off the unit when not in use for extended periods.
• Do not attempt to repair the unit yourself. For any issues, contact your local dealer or authorized service center.

8. Warranty and Support

Your Xduoo XD05 Basic2 comes with a 12-month free warranty service from the date of sale. This warranty covers product fault conditions. Accessories are not covered under warranty. If the warranty period has expired, our company will charge for parts and service depending on the fault condition.

For technical support or warranty claims, please contact your nearest Xduoo dealer or refer to the contact information provided in your purchase documentation.