KGUSS xDuoo XA-02 Balanced DAC Headphone AMP Manual Pengguna

1. Pengenalan Produk

The xDuoo XA-02 is a high-fidelity small desktop balanced headphone amplifier that integrates USB, Optical, Coaxial, and Bluetooth audio decoding with an analog audio input. It features an OLED 1.3-inch screen for displaying working status. The USB audio decoder utilizes XMOS's XU316 chip, supporting digital audio signals up to PCM 32Bit/384kHz, MQA, and DSD256. Optical and coaxial inputs support maximum PCM 24Bit/192kHz and DSD64 (DOP). Bluetooth connectivity uses QCC5125, supporting popular codecs like aptX, aptX_HD, aptX_LL, LDAC, and AAC. The analog amplification part adopts a fully balanced Class A design structure, providing powerful output and strong load capacity to drive various headphones, enhancing sound dynamics and restoring audio fidelity.

Imej: Depan dan belakang view of the xDuoo XA-02 Balanced DAC Headphone AMP, highlighting its compact design and various input/output options.

2. Ciri-ciri Produk

• Skrin OLED 1.3 inci: Displays music information and operational status clearly.
• USB Audio Decoding: Supports asynchronous transfer mode for PCM 32Bit/384kHz, MQA, and DSD256.
• High-Performance DAC Chip: Features ESS's ES9039Q2M chip for superior decoding of native DSD, DXD, and PCM signals.
• Advanced Bluetooth Audio: Bluetooth 5.1 with support for SBC, AAC, aptX, aptX_LL, aptX_HD, and LDAC codecs.
• Coaxial/Optical Audio: Supports PCM 24Bit/192kHz and DSD64 signal input.
• Optimized Power Design: Built-in filter circuit and high-efficiency power conversion circuit, with separate power supply to critical components for optimal performance.
• Kelas A Amplebih hidup: Utilizes transistors in a Class A circuit for strong load capacity, capable of driving various headphones.
• Kapasitor Audio Premium: Employs ELNA's SILMIC professional audio capacitors for power filter, ensuring soft, warm sound and splendid high frequencies.
• Output Relay Protection: Built-in relay protection prevents 'pop' noise during power on/off and safeguards connected headphones and the device.

Image: Diagram illustrating the truly balanced output path from decoding to the amplifier circuit, designed to reduce noise and improve channel separation.

Image: Visual representation of the various high-resolution music formats supported by the XA-02, including MQA 8X, DSD256, PCM 32Bit/384kHz, and DXD 32Bit/384kHz.

3. Bahagian dan Kawalan

Panel Depan

1. Fon Kepala 6.35mm Keluar: Standard headphone output.
2. 4.4mm Balanced Headphone Out: Output fon kepala yang seimbang untuk kualiti audio yang dipertingkatkan.
3. Skrin: 1.3-inch OLED display for status and settings.
4. Kekunci Menu: Press to enter or exit menu settings. Rotate the volume knob to select menu items, and press the volume knob to confirm.
5. Pairing (Bluetooth) Button: Long press for 3 seconds to force the device into Bluetooth pairing state.
6. Tombol berbilang fungsi:
   • Turn clockwise to increase volume; turn counter-clockwise to decrease volume.
   • Short press to change input channel: USB In, Coaxial, Optical, and Bluetooth In.
   • In menu settings, press this button to confirm selection.

   Backlight Color Indication:

   Kelantangan	warna
   0-20	Cyan Gelap
   21-45	Bright Cyan
   46-75	Merah Muda
   76-99	Merah pekat

Panel Belakang

7. AUX Keluar: Analog audio output from the DAC.
8. Coaxial IN: Input audio digital sepaksi.
9. Optik DALAM: Input audio digital optik.
10. USB DALAM: Input audio USB.
11. Upgrade Interface: Untuk kemas kini perisian tegar.
12. Input Kuasa: Connect to AC100-240V power supply.
13. Hidupkan/Mati Kuasa: Suis kuasa utama.
14. Antena Bluetooth: Titik sambungan untuk antena Bluetooth.

Image: Front panel of the XA-02 with numbered labels indicating the 6.35mm headphone out, 4.4mm balanced headphone out, screen, menu key, pairing button, and multi-function knob.

Image: Rear panel of the XA-02 with numbered labels indicating AUX Out, Coaxial IN, Optical IN, USB IN, Upgrade interface, Power input, Power on/off switch, and Bluetooth antenna connection.

4. Persediaan

1. Sambungan Kuasa: Connect the power cable to the XA-02's power input (AC100-240V) and then to a power outlet. Ensure the power switch on the rear panel is in the 'OFF' position before connecting.
2. Pemasangan Antena Bluetooth: Screw the provided Bluetooth antenna into the designated port on the rear panel.
3. Hidupkan kuasa: Press the power switch on the rear panel to the 'ON' position. The OLED screen will light up.

5. Arahan Operasi

1. Changing Input Channel: Short press the multi-function knob to cycle through available input channels: USB, Coaxial, Optical, and Bluetooth. The selected input will be displayed on the OLED screen.
2. Pairing Bluetooth: If you select Bluetooth input, long press the pairing (Bluetooth) button for 3 seconds to enter pairing mode. On your mobile device or computer, search for 'XA-02' in the Bluetooth settings and connect.
3. Pelarasan Kelantangan: Rotate the multi-function knob clockwise to increase the volume and counter-clockwise to decrease it. The volume level (0-99) and corresponding backlight color will be displayed on the screen.
4. Tetapan Menu: Press the menu key to enter the menu settings. Rotate the multi-function knob to navigate through options like FILTER (FIR1-FIR8), GAIN (G=H for High, G=L for Low), and BASS (ON/OFF). Press the multi-function knob to confirm your selection.
5. Fon Kepala Menyambung: Connect your headphones to either the 6.35mm or 4.4mm balanced headphone output on the front panel.

Image: Close-up of the XA-02's digital volume knob and OLED display, showing volume level and input status. The backlight color changes with volume.

6. Menyambung ke Peranti Audio

1. Input USB: Set the input to 'USB IN' on the screen. Use a USB cable to connect the XA-02 to an Apple, Windows, or Linux computer, mobile phone, tablet, or HiFi player. Connect your headphones to the XA-02. Ensure the XA-02 is set as the audio output device on your computer/device.
2. Input Koaksial/Optik: Set the input to 'COAXIAL' or 'OPTICAL' on the screen. Use a Coaxial or Optical cable to connect the XA-02 to a player or CD player with Coaxial/Optical audio output. Connect your headphones to the XA-02.
3. Input Bluetooth: Set the input to 'Bluetooth' on the screen. Connect your Bluetooth-enabled phone or computer to the XA-02 via Bluetooth. Connect your headphones to the XA-02.
4. Output AUX: When using USB, Coaxial, Optical, or Bluetooth input, the AUX OUT can be connected to other Hi-Fi amplifiers or active speakers for further audio routing.

Nota: To avoid noise, do not tie the audio cable together with the power cable.

Troubleshooting No Sound (Computer Connection): If there is no sound when connecting to a computer, check the PC audio output device settings. Click the PC start menu and select: Control Panel → Hardware and Sound → Hardware and Sound → Sound. After the computer displays an interface, click the <Play> option, and then select "xDuoo USB Audio" to set it as the default playback device.

Image: Diagram illustrating various connection methods for the XA-02, including USB, Coaxial, Optical, and Bluetooth inputs, and AUX output to speakers.

7. Senarai Aksesori

The following items are included with your xDuoo XA-02:

• xDuoo XA-02 Unit
• Antena Bluetooth
• 6.35 to 3.5 Converter
• Kabel USB Jenis-C
• Kabel Kuasa
• Manual Pengguna
• Kad Waranti

8. Spesifikasi

SampSokongan Kadar ling

• USB DALAM: PCM: 16-32Bit/44.1K-384KHz; DSD: DSD64-256; MQA: 44.1K-384KHz.
• COA/OPT IN: PCM: 16-24Bit/44.1-192KHz; DSD: DSD64(DOP).

6.35mm Headphone Output Parameters

• Kuasa Output: 910mW (32Ω beban)
• Respons Kekerapan: 20Hz-60KHz (±0.5dB)
• Crosstalk: ≥71dB
• SNR: 119dB (A Weight)
• THD + N: 0.002%

4.4mm Balanced Headphone Output Parameters

• Kuasa Output: 2000mW (32Ω beban)
• Respons Kekerapan: 20Hz-60KHz (±0.5dB)
• Crosstalk: ≥118dB
• SNR: 121dB (A Weight)
• THD + N: 0.0004%

Parameter AUX OUT

• Tahap output: 2.6Vrms
• Respons Kekerapan: 20Hz-60KHz (±0.2dB)
• Crosstalk: ≥118dB
• SNR: 121dB (A Weight)
• THD+N: ≤0.0004%

9. Maintenance Instruction and Warranty Terms

Arahan Penyelenggaraan

1. Do not place the unit under direct sunlight or near heating equipment.
2. Do not place the machine in a high temperature or dusty place, or allow any items with water to be placed on it.
3. Do not use chemical solvents to clean the machine. Otherwise, it may damage the surface coating. Please use a soft, dry cloth to wipe it.
4. Turn the unit power off when not using it for a long time.
5. Do not attempt to repair the unit by yourself. If there are any problems, you should send it to local dealers for repair.

Maklumat Waranti

Our products come with 12-months free warranty services from the date of sale. If the warranty period is expired, our company will charge costs depending on the product fault conditions. Accessories are not covered under warranty.

10. Penyelesaian masalah

If you encounter issues with your xDuoo XA-02, please refer to the following common troubleshooting steps:

• Tiada Kuasa: Ensure the power cable is securely connected to both the unit and the power outlet, and that the power switch on the rear panel is in the 'ON' position.
• Tiada Bunyi:
  • Check if the correct input source (USB, Coaxial, Optical, Bluetooth) is selected on the XA-02.
  • Verify that your headphones are properly connected to either the 6.35mm or 4.4mm output.
  • Increase the volume using the multi-function knob.
  • If using a computer, ensure the XA-02 is selected as the default audio output device (refer to 'Connecting to Audio Devices' section for detailed steps).
  • Jika menggunakan Bluetooth, pastikan peranti dipasangkan dan disambungkan dengan betul.
• Bunyi Herot:
  • Semak sumber audio untuk masalah kualiti.
  • Pastikan kabel audio disambungkan dengan selamat dan tidak rosak.
  • Try a different audio cable or input source.
  • Kurangkan kelantangan untuk melihat sama ada herotan berterusan.
• Isu Sambungan Bluetooth:
  • Ensure the Bluetooth antenna is securely installed.
  • Make sure the XA-02 is in Bluetooth pairing mode (long press the pairing button).
  • Ensure your source device's Bluetooth is enabled and within range.
  • Cuba nyahgandingkan dan pasangkan semula peranti.
• Unit Tidak Menjawab: Try turning the unit off and on again. If the problem persists, disconnect the power for a few minutes and then reconnect.

If these steps do not resolve the issue, please contact your local dealer or customer support for further assistance.