Gustard DAC-R26II Network Streaming DAC

1. ആമുഖവും അവസാനവുംview

The Gustard DAC-R26II is a high-performance 26-bit R2R Digital-to-Analog Converter with integrated network streaming capabilities, designed for discerning audiophiles. It features a discrete R-2R resistor ladder network for natural sound reproduction and supports a wide range of high-resolution audio formats.

പ്രധാന സവിശേഷതകളിൽ ഇവ ഉൾപ്പെടുന്നു:

• Discrete R-2R Architecture: Utilizes a 26-bit R-2R resistor ladder network for high linearity and natural audio texture.
• Full-Format High-Resolution Decoding: Supports DSD2048 (via IIS) and PCM 32-bit/768kHz, with a DIRECT DSD mode for preserving original bitstream details.
• High-Precision Clock Module: Integrated GCLK-02 clock module with PLL technology reduces digital jitter and supports external 10MHz clock input.
• Comprehensive Interface Coverage: Features USB (XMOS XU216), Optical, Coaxial, IIS, AES, and LAN digital inputs, along with RCA/XLR analog outputs.
• Custom Class-A LPF Circuit: Fully discrete Class-A low-pass filter output stage optimizes sound layers and enhances transient response.
• Seamless Multi-Protocol Streaming: Supports mainstream network protocols for high-resolution music via wired and wireless connections.

This manual provides detailed instructions for setting up, operating, and maintaining your DAC-R26II to ensure optimal performance and longevity.

2. പാക്കിംഗ് ലിസ്റ്റ്

Please check the contents of your package upon unboxing. The following items should be included:

• Main Unit (Gustard DAC-R26II)
• പവർ കോർഡ്
• USB കേബിൾ
• റിമോട്ട് കൺട്രോൾ
• ബ്ലൂടൂത്ത് ആൻ്റിന
• Gustard Warranty Card
• ദ്രുത ആരംഭ ഗൈഡ്

Image: Contents of the Gustard DAC-R26II package, including the main unit, power cord, USB cable, remote control, Bluetooth antenna, warranty card, and quick start guide.

3. Front Panel Introduction

The front panel of the DAC-R26II features a clear display and intuitive controls for easy operation.

ചിത്രം: വിശദമായത് view of the Gustard DAC-R26II front panel, highlighting the display and control buttons.

1. പവർ ബട്ടൺ: Switches between Standby and Operation states. The unit remains in standby when the rear power switch is on.
2. ഡിസ്പ്ലേ സ്ക്രീൻ: Shows the current input channel, encoding format, and sampling rate. Displays menu items when entering the settings menu.
3. Setting/Volume Button (-): Typically used to decrease volume. In the menu interface, it is used to switch options.
4. Menu/Input Button (*): Short press to switch input selection; Long press to enter or exit the menu; Short press within the menu to toggle items.
5. Volume Button (+): Typically used to increase volume. In the menu interface, it is used to switch options.

4. Rear Panel Interface

The rear panel provides all necessary input and output connections for integrating the DAC-R26II into your audio system.

ചിത്രം: വിശദമായത് view of the Gustard DAC-R26II rear panel, illustrating all input and output ports.

അനലോഗ് ഔട്ട്പുട്ടുകൾ:

• XLR Right (Balanced) / XLR Left (Balanced): For balanced audio output.
• RCA Right (Single-Ended) / RCA Left (Single-Ended): For single-ended audio output.

ഡിജിറ്റൽ ഇൻപുട്ടുകൾ:

• LAN (Network Input): For network streaming.
• USB: ഒരു കമ്പ്യൂട്ടറിലേക്കോ മറ്റ് USB ഓഡിയോ ഉറവിടത്തിലേക്കോ ബന്ധിപ്പിക്കുന്നതിന്.
• IIS Input (HDMI format): For high-resolution audio input, supporting DSD2048.
• ഏകോപന ഇൻപുട്ട്: Standard S/PDIF coaxial digital input.
• AES/EBU Digital Input: Professional digital audio input.
• ഒപ്റ്റിക്കൽ ഇൻപുട്ട്: Standard S/PDIF optical digital input.

മറ്റ് കണക്ഷനുകൾ:

• Firmware Update Port (UPDATE): For future firmware upgrades.
• ബ്ലൂടൂത്ത് ആന്റിന: Connect the provided Bluetooth antenna for wireless connectivity.
• 10MHz Clock Input (BNC): For connecting an external 10MHz clock source.
• വാല്യംtage Selector (115V/230V): മുന്നറിയിപ്പ്: Ensure both switches are set to match your local power supply (110V or 220V). Failure to do so will damage the internal transformer upon power-up.
• എസി പവർ ഇൻപുട്ട്: Connect the provided power cord here.
• വൈദ്യുതി സ്വിച്ച്: മെയിൻ പവർ ഓൺ/ഓഫ് സ്വിച്ച്.

5. സജ്ജീകരണവും ഇൻസ്റ്റാളേഷനും

Follow these steps to set up your Gustard DAC-R26II:

1. അൺബോക്സിംഗ്: Carefully remove the DAC-R26II and all accessories from the packaging. Retain the packaging for future transport or storage.
2. പ്ലേസ്മെൻ്റ്: Place the DAC on a stable, level surface, away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit.
3. വാല്യംtagഇ തിരഞ്ഞെടുക്കൽ: നിർണായക ഘട്ടം: Before connecting the power cord, verify that the വാല്യംtagഇ സെലക്ടർ on the rear panel is correctly set to your local power supply (115V or 230V). Incorrect selection will cause damage.
4. Connect Bluetooth Antenna: Screw the provided Bluetooth antenna into its designated port on the rear panel.
5. ഓഡിയോ ഔട്ട്പുട്ടുകൾ ബന്ധിപ്പിക്കുക: Connect the DAC-R26II to your ampലൈഫ് അല്ലെങ്കിൽ ഹെഡ്ഫോൺ amplifier using either the XLR (balanced) or RCA (single-ended) analog outputs. Use high-quality cables for optimal sound.
6. ഡിജിറ്റൽ ഇൻപുട്ടുകൾ ബന്ധിപ്പിക്കുക: Connect your digital audio sources (e.g., computer, CD player, network streamer) to the appropriate digital input ports (USB, Optical, Coaxial, IIS, AES, LAN).
7. പവർ ബന്ധിപ്പിക്കുക: Once all audio connections are made and the voltage selector is confirmed, connect the power cord to the AC Power Input on the rear panel, then plug it into a wall outlet.
8. പവർ ഓൺ: Flip the main Power Switch on the rear panel to the 'ON' position. The unit will enter standby mode. Press the Power Button on the front panel to turn on the unit.

6. പ്രവർത്തന നിർദ്ദേശങ്ങൾ

6.1. Display Screen Introduction

The R26II uses a large OLED display to provide real-time status and facilitate functional operations.

ചിത്രം: ഉദാample of the DAC-R26II display showing active input, clock status, audio format, and volume mode.

• ഇൻപുട്ട് ചാനൽ: Indicates the currently selected input (e.g., COAX, AES, OPT, BT, USB, Streamer, IIS).
• External Clock Display: Shows 'EXT' if an external 10MHz clock is detected and used.
• Encoding Format & Sampലിംഗ് നിരക്ക്: Displays the current audio format (e.g., PCM, DSD) and its sampling rate (e.g., 44.1kHz, 768kHz, DSD256).
• വോളിയം ഡിസ്പ്ലേ: Shows the current volume level (e.g., -90dB to 00dB) or 'FIXED' for fixed output mode (volume bypass).

6.2. Input Channel Selection

The R26II has a total of 7 input channels. In the main screen state, short press the Menu/Input Button (*) on the front panel to cycle through the available inputs: COAX → AES → OPT → BT → USB → Streamer → IIS.

6.3. Volume Regulation (VOLUME)

In the main screen state, use the +/- കീകൾ on the front panel or remote to adjust the analog volume attenuation.

• പരിധി: 00dB to -90dB (Total 90 steps).
• FIXED Mode: When volume is at 00dB, increasing it further enters Fixed Output Mode (Volume Bypass). Decrease volume to exit FIXED mode.

6.4. ക്രമീകരണ മെനു

To access the settings menu, long press the Menu/Input Button (*) on the front panel. Use the +/- ബട്ടണുകൾ to adjust the currently selected option. Long press the Menu/Input Button (*) again to return to the main page.

Menu Items Overview:

1. PCM FILTER: PCM Digital Filter Adjustment (Fast, Medium, Slow).
2. DSD DIRECT: DSD Direct Mode (Disable, Enable).
3. NOS MODE: PCM NOS (Non-Oversampling) Mode (Disable, Enable).
4. REF CLOCK: Reference Clock Source Selection (Internal, EXT.10MHz).
5. IIS MODE: IIS Pin Sequence Mode (MODE1, MODE2, MODE3, MODE4).
6. ഘട്ടം: Analog Output Phase Control (Non-inverted, Inverted).
7. പ്രദർശിപ്പിക്കുക: Screen Brightness (AUTO, AUTO ALL OFF, AUTO DISPLAY OFF).
8. സ്റ്റാൻഡ് ബൈ: Standby Mode Behavior (Manual, Auto).

6.5. Streamer Usage (Network Bridge)

The DAC-R26II includes a network bridge system co-engineered with CelAudio, supporting various streaming protocols.

Image: Screenshot of the network bridge configuration interface, showing various streaming protocols.

1. Connect the R26II to your LAN via the RJ45 port.
2. Select the 'Streamer' input channel on the DAC.
3. Wait for the system to boot (approx. 1 minute). The screen will show "DSD 24.5M" or similar.
4. എ തുറക്കുക web browser on a device in the same LAN and visit: http://r26.local.
5. ൽ web interface, you can enable/disable protocols (AirPlay, Roon Bridge, UPnP, HQPlayer NAA, Spotify) to optimize performance.
6. Firmware updates for the bridge are also handled via this web പേജ്.

7. റിമോട്ട് കൺട്രോൾ

The DAC-R26II is equipped with a dedicated remote control for convenient operation.

Image: The Gustard DAC-R26II remote control with labeled buttons.

1. സ്റ്റാൻഡ്‌ബൈ ബട്ടൺ: Toggles between Operation and Standby. Wakes up the screen in standby mode.
2. മെനു: Enters function settings.
3. ദിശാസൂചന പാഡ്: Up/Down: Switch function. Left/Right: Adjust options. Center: Unmute / Mute.
4. മടങ്ങുക: പ്രധാന സ്‌ക്രീനിലേക്ക് മടങ്ങുക.
5. VOL - / VOL +: വോളിയം ക്രമീകരിക്കുക.
6. DAC / AMP / STREAM Buttons: These buttons are used to switch the remote's control mode for different Gustard products (DAC, Amplifier, Streamer). Long press for 5 seconds to switch between modes. Ensure the remote is in 'DAC' mode for controlling the R26II.

ജാഗ്രത:

• കോണിനെ ആശ്രയിച്ച് പ്രവർത്തന ദൂരം വ്യത്യാസപ്പെടുന്നു.
• The remote control may not function properly if there are objects between the remote control and the sensor.
• Remove the batteries if the remote control will not be used for an extended period (one month or longer).
• If the battery leaks, thoroughly clean all residue from the battery compartment and install new batteries.
• Using this remote control may cause malfunctions in other devices controlled by infrared signals.

8. പരിപാലനം

Proper maintenance ensures the longevity and optimal performance of your Gustard DAC-R26II.

• വൃത്തിയാക്കൽ: Use a soft, dry cloth to clean the exterior of the unit. Avoid abrasive cleaners, solvents, or chemical sprays, as these can damage the finish.
• വെൻ്റിലേഷൻ: Ensure that the ventilation slots on the unit are not blocked. Do not place the unit in an enclosed space without proper airflow.
• പവർ ഓഫ്: Always power off the unit and disconnect it from the power outlet before cleaning or if it will be unused for an extended period.
• ദ്രാവകങ്ങൾ ഒഴിവാക്കുക: Do not expose the unit to liquids or excessive moisture. If liquid enters the unit, immediately disconnect power and contact customer support.
• താപനില: Operate the unit within recommended temperature ranges. Avoid extreme hot or cold environments.

9. പ്രശ്‌നപരിഹാരം

If you encounter issues with your DAC-R26II, please refer to the following common troubleshooting steps:

ശക്തിയില്ല:

• Check if the power cord is securely connected to both the DAC and the wall outlet.
• Ensure the main Power Switch on the rear panel is in the 'ON' position.
• വോളിയം പരിശോധിക്കുകtage Selector on the rear panel is set correctly (115V or 230V) for your region.
• പവർ ഔട്ട്‌ലെറ്റ് പ്രവർത്തനക്ഷമമാണെന്ന് ഉറപ്പാക്കാൻ മറ്റൊരു ഉപകരണം ഉപയോഗിച്ച് അത് പരിശോധിക്കുക.

സൗണ്ട് ഔട്ട്പുട്ട് ഇല്ല:

• Confirm the correct input source is selected on the DAC's front panel or via remote.
• Check all audio cables (XLR, RCA, digital inputs) for secure connections.
• നിങ്ങളുടെ ഉറപ്പാക്കുക ampലൈഫ് അല്ലെങ്കിൽ ഹെഡ്ഫോൺ ampലിഫയർ ഓണാക്കി ശരിയായ ഇൻപുട്ടിലേക്ക് സജ്ജമാക്കിയിരിക്കുന്നു.
• Verify the volume level on the DAC is not muted or set too low. If 'FIXED' mode is active, ensure your amplifier's volume is adjusted.
• If using USB, ensure the correct drivers are installed on your computer (if applicable) and the DAC is selected as the output device.
• For network streaming, ensure the DAC is connected to the network and the streaming service/app is configured correctly.

Intermittent Audio / Dropouts:

• Check digital cable quality and length. Long or low-quality cables can cause signal degradation.
• എസ് ഉറപ്പാക്കുകampling rate of the source matches the DAC's capabilities or is within its supported range.
• If using network streaming, check your network connection stability and bandwidth.
• If 'NOS MODE' is enabled with high-performance software, a click sound may occur when switching between different sampling formats. This is normal behavior for NOS mode.

If the issue persists after trying these steps, please contact Gustard customer support for further assistance.

10. ഉൽപ്പന്ന സവിശേഷതകൾ

Detailed technical specifications for the Gustard DAC-R26II:

ഡിജിറ്റൽ ഇൻപുട്ടുകൾ:

• COAX/AES/OPT: PCM 16-24bit/44.1-192kHz; DSD DoP64
• USB/Streamer: PCM 16-32bit/44.1-768kHz; DSD DoP64-DOP256; NATIVE DSD: DSD64-DSD512
• IIS: PCM 16-32bit/44.1-1536kHz; NATIVE DSD: DSD64-DSD2048 (DSD2048: @ DSD direct mode)
• 10M Input Interface (BNC): Input impedance 50 Ohm, 0dBm-20dBm, CMOS square wave 0.2V-3.3V, sine wave 0.5-3.3V

അനലോഗ് put ട്ട്‌പുട്ട്:

• ഫ്രീക്വൻസി പ്രതികരണം: 20-20kHz /±0.2dB (OS mode)
• ചലനാത്മക ശ്രേണി: >117dB
• സിഗ്നൽ-ടു-നോയിസ് അനുപാതം: >122dB
• ചാനൽ ക്രോസ്‌സ്റ്റോക്ക്: <-134dB @ 1kHz
• THD+N: <=0.003% @1kHz
• IMD: ≈0.008% @ 0dbfs
• RCA ഔട്ട്പുട്ട് ലെവൽ: 2.5Vrms (വോളിയം ഫിക്സഡ്)
• RCA Output Impedance: 100Ω
• XLR Output Level: 5.0Vrms (വോളിയം ഫിക്സഡ്)
• XLR ഔട്ട്പുട്ട് ഇംപെഡൻസ്: 100Ω

Miscellaneous Specifications:

• എസി പവർ: AC115V/230V 50/60Hz; 115V, 230V (Manual switching)
• വൈദ്യുതി ഉപഭോഗം: <20W
• ചേസിസ് അളവുകൾ: 330 x 260 x 65 mm (excluding pins 10mm)
• ഭാരം: 5.5KG

11. വാറൻ്റിയും പിന്തുണയും

Gustard products are manufactured to high standards. For warranty information, please refer to the Gustard Warranty Card included in your package. Keep your purchase receipt as proof of purchase.

സംരക്ഷണ പദ്ധതികൾ:

Additional protection plans may be available for purchase from your retailer:

• 3 വർഷത്തെ സംരക്ഷണ പദ്ധതി: 36 മാസത്തേക്ക് കവറേജ് നീട്ടുന്നു.
• പൂർണ്ണ സംരക്ഷണം: യോഗ്യമായ മുൻകാല, ഭാവി വാങ്ങലുകൾ ഉൾക്കൊള്ളുന്ന ഒരു പ്രതിമാസ പ്ലാൻ.

For technical support, service, or warranty claims, please contact your authorized Gustard dealer or the manufacturer directly. Contact information can typically be found on the Gustard webസൈറ്റ് അല്ലെങ്കിൽ നിങ്ങളുടെ വാറന്റി കാർഡ്.

തിരികെ നൽകൽ നയം: This product typically has a 30-day return/replacement policy from the date of purchase. Please consult your retailer for specific return terms.

12. ഉൽപ്പന്ന വീഡിയോകൾ

Watch these official videos for more information on the Gustard DAC-R26II.