Gustard R30 True 1-bit DAC User Manual

1. Introducció

This manual provides detailed instructions for the setup, operation, and maintenance of your Gustard R30 True 1-bit Digital-to-Analog Converter (DAC). The R30 is designed to deliver high-fidelity audio reproduction through its advanced discrete R-2R architecture and versatile input/output options.

Imatge 1.1: Frontal view of the Gustard R30 True 1-bit DAC.

1.1. Què hi ha a la caixa

• Gustard R30 DAC Unit
• Cable USB
• Control remot
• Cable d'alimentació
• Gustard Card (Warranty/Information)

2. Característiques clau

The Gustard R30 incorporates several advanced technologies to ensure exceptional audio performance:

2.1. Discrete R-2R Module

The R30 utilizes a discrete R-2R network with precisely matched resistors for digital-to-analog conversion. This architecture aims to reproduce audio signals with high fidelity and natural sound characteristics, distinct from delta-sigma DAC designs.

Imatge 2.1: Detallada view of the Discrete R-2R DAC module.

2.2. True 1-bit DSD Decoding

The R30 supports native DSD1024 resolution through its true 1-bit DSD DAC architecture. In DIRECT mode, DSD signals are processed without PCM conversion, preserving the original digital stream for authentic playback.

2.3. Versatile Digital Inputs

The device offers multiple digital input options, including USB, LAN, Optical, Coaxial, AES, and IIS. USB, LAN, and AES inputs support audio decoding up to PCM 32Bit/768kHz and DSD512, allowing connection to various source devices.

2.4. Flexible Analog Outputs

Analog audio outputs are provided via RCA and XLR connections, facilitating integration with power amplifiers, active speakers, and other Hi-Fi audio equipment.

2.5. GCLK-02 Clock Module and External Clock Support

The integrated GCLK-02 clock module utilizes advanced PLL technology for precise clock signal processing. The R30 also supports external 10MHz clock input for further enhancement of audio quality.

Imatge 2.2: Interna view showing FPGA, GCLK-02 Clock Module, OCXO clock, and Digital Filter.

2.6. Network Streaming Capabilities

The R30 supports various network streaming protocols and services, including Roon Bridge, AirPlay, UPnP/DLNA, HQPlayer NAA, mConnect, BubbleUPnP, and Spotify. Access these features by navigating to http://r30.local en a web navegador en un dispositiu connectat.

Image 2.3: Supported network streaming applications.

2.7. 12V Trigger System

The DAC-R30 includes 12V trigger input and output, enabling synchronized power on/off with compatible audio components for streamlined system control.

3. Configuració

3.1. Col·locació

Place the R30 on a stable, level surface away from direct heat sources, moisture, and strong electromagnetic fields. Ensure adequate ventilation around the unit.

3.2. Connexió d'alimentació

1. Connect the provided power cable to the AC inlet on the rear panel of the R30.
2. Connecteu l'altre extrem del cable d'alimentació a una presa de corrent de CA adequada.

3.3. Connexions d'entrada d'àudio

Connect your digital audio source(s) to the corresponding input ports on the R30's rear panel:

• USB: Per connectar-lo a un ordinador o a una altra font d'àudio USB.
• Òptic (TOSLINK): For connecting to TVs, CD players, or other optical digital sources.
• Coaxial (RCA): For connecting to CD transports or other coaxial digital sources.
• AES (XLR): For professional audio equipment with AES/EBU digital output.
• IIS (HDMI): For connecting to compatible IIS-enabled audio devices.
• LAN (Ethernet): For network streaming from a local network or internet services.

3.4. Connexions de sortida d'àudio

Connect the R30 to your ampparlants activadors o actius:

• Sortides RCA: Use high-quality RCA cables to connect to the analog inputs of your amplifier o altaveus actius.
• Sortides XLR: Use balanced XLR cables for optimal signal integrity when connecting to compatible balanced inputs on your amplifier o altaveus actius.

3.5. 12V Trigger Connection (Optional)

If your other audio components support 12V trigger, connect a 12V trigger cable between the R30 and the compatible device to enable synchronized power control.

4. Funcionament

4.1. Encendre/apagar

Press the standby switch on the front panel to power on or power off the unit. The display will illuminate upon power-on.

Image 4.1: Front panel layout with display and touch interface.

4.2. Selecció d'entrada

Use the touch interface buttons on the front panel or the remote control to cycle through the available digital inputs (USB, Optical, Coaxial, AES, IIS, LAN). The selected input will be indicated on the display.

4.3. Volume Control (Preamp funció)

If using the R30 as a preamp, adjust the volume using the '+' and '-' buttons on the front panel or the remote control. The volume level will be shown on the display. Ensure the volume is set to a safe level before playing audio.

4.4. Network Streaming

To configure and manage network streaming services (Roon Bridge, AirPlay, etc.), open a web browser on a device connected to the same network as the R30 and navigate to http://r30.local. Follow the on-screen instructions to enable or disable specific protocols.

Image 4.2: Supported network streaming protocols.

4.5. Funcions de control remot

The included remote control provides convenient access to power, input selection, volume adjustment, and other settings. Refer to the remote control diagram for specific button functions.

Image 4.3: Gustard R30 DAC and its remote control.

5. Manteniment

To ensure the longevity and optimal performance of your Gustard R30 DAC:

• Neteja: Feu servir un drap suau i sec per netejar l'exterior de la unitat. Eviteu productes de neteja o dissolvents abrasius.
• Ventilació: Assegureu-vos que les obertures de ventilació no estiguin obstruïdes.
• Emmagatzematge: Si guardeu la unitat durant un període prolongat, desconnecteu-la de l'alimentació i guardeu-la en un lloc fresc i sec.
• Potència: Always disconnect the power cable before performing any cleaning or maintenance.

6. Solució De Problemes

If you encounter issues with your R30 DAC, refer to the following common troubleshooting steps:

• Sense energia:
  • Check if the power cable is securely connected to both the R30 and the power outlet.
  • Comproveu que la presa de corrent funcioni.
  • Ensure the standby switch on the front panel is pressed.
• Sense sortida de so:
  • Confirm that the correct input source is selected on the R30.
  • Check all audio cables (RCA/XLR) for secure connections between the R30 and your amplifier/altaveus actius.
  • Assegureu-vos el vostre amplifier/active speakers are powered on and set to the correct input.
  • Adjust the volume level on the R30 and your ampmés viu.
  • For USB input, ensure the necessary drivers are installed on your computer (if required).
• Intermittent Audio/Distortion:
  • Comproveu totes les connexions dels cables per si hi ha fluïdesa o danys.
  • Assegureu-vos que el sample rate and bit depth settings on your source device match the R30's capabilities.
  • Try a different input source or cable to isolate the issue.
• Network Streaming Issues:
  • Ensure the R30 is connected to your network via an Ethernet cable.
  • Verifiqueu que la vostra xarxa funciona correctament.
  • Accés http://r30.local to check the status of streaming services and enable/disable them as needed.
  • Restart your network router and the R30.

7. Especificacions

8. Garantia i Suport

For warranty information and technical support, please refer to the Gustard Card included in your product packaging or visit the official Gustard website. Contact the seller or manufacturer directly for assistance with product-related issues or service requests.