1. Uvod
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your Gustard X26III DAC Network Bridge and Streaming device. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.

Slika 1.1: Prednja strana view of the Gustard X26III DAC Network Bridge and Streaming device, showcasing its sleek silver design and front panel display.
2. Ključne karakteristike
- Dual ES9039SPRO DAC Chips: Utilizes two ESS flagship ES9039SPRO chips for Digital-to-Analog Conversion, with one chip dedicated to each left and right channel. Features independent power supply and grounding for enhanced sound performance.
- DSP Digital Filter: Incorporates a high-performance digital filter solution based on the Analog Device SHARC digital audio-specific DSP platform. This filter reduces audio in-band aliasing noise, upscales, and noise shapes the digital audio stream signal using a high-precision floating-point 64-bit operation.
- FPGA Programmable Logic Chip: Features exclusive technologies including self-constructed logic functions, clock management, 2nd PLL digital shaping, DOP demodulation, and PCM/DSD depop switch, contributing to superior sound quality.
- GCLK-02 Clock Module: A high-performance clock frequency synthesizer employing advanced PLL (Phase Locked Loop) technology for stable and accurate clock signals. Supports both local and external 10MHz clock sources, reducing dependence on front-end audio equipment clock performance.
- Hybrid IV Conversion Circuit: Independent parallel circuit design fully meets the high current requirements of the ES9039SPRO chips.
- Network Bridge and Streaming: Supports Roon, Airplay, UPnP, NAA, and Spotify protocols with 100/1000Mbps LAN speed.
- Fully Balanced Design: Features a fully balanced design with complete four outputs.
- Dual High-Capacity Toroidal-Core Power Transformers: Isolated power supplies for digital and analog sections.

Slika 2.1: Prekoview of the Gustard X26III's key features, including its dual ES9039SPRO DACs, GCLK-02 clock, and network streaming support.

Slika 2.2: Detaljno view of the internal components, specifically highlighting the dual ES9039SPRO DAC chips and the DSP digital filter implementation.

Image 2.3: A closer look at the GCLK-02 clock module and the hybrid IV conversion circuit, demonstrating the precision engineering.

Slika 2.4: Unutrašnje view illustrating the USB interface, dual toroidal transformers for isolated power, and multiple power supply groups.
3. Sadržaj paketa
Prilikom raspakivanja, molimo Vas da se uvjerite da su svi predmeti prisutni:
- Gustard X26III DAC Network Bridge and Streaming Unit
- Daljinski upravljač
- Power Cable
- USB kabel
- Korisnički priručnik (ovaj dokument)
4. Vodič za postavljanje
Follow these steps to set up your Gustard X26III device:
4.1 Priključak za napajanje
- Osigurajte voltagPrekidač na zadnjoj ploči je postavljen na ispravnu jačinu zvukatagza vašu regiju (115V ili 230V).
- Connect the provided power cable to the AC power input on the rear panel of the X26III and then to a suitable wall outlet.
4.2 Audio veze
The X26III offers both RCA and XLR analog outputs.
- RCA izlaz: Connect RCA cables from the 'Line out RCA' ports on the X26III to the analog input of your amplifier ili pre-amplifier.
- XLR izlaz: Connect XLR cables from the 'Line out XLR' ports on the X26III to the balanced analog input of your amplifier ili pre-amplifier. Ensure correct pin configuration (American Standard: 1 ground, 2 hot, 3 cold).
4.3 Digital Input Connections
Connect your digital audio sources to the appropriate input ports:
- USB ulaz: Connect a USB cable from your computer or digital audio player to the 'USB input' port.
- AES ulaz: Connect an AES/EBU cable to the 'AES input' port.
- Koaksijalni ulaz: Connect a coaxial S/PDIF cable to the 'Coaxial input' port.
- optički ulaz: Connect an optical TOSLINK cable to the 'Optical input' port.
- I²S ulaz: Connect an I²S cable to the 'I²S input' port. Refer to section 5.4 for I²S line sequence adjustment.
4.4 Mrežna veza
For streaming functionalities, connect an Ethernet cable to the 'LAN' port on the rear panel.
4.5 External Clock Connection
If using an external 10MHz clock, connect it to the '10M clock (BNC)' input on the rear panel.
4.6 Početno uključivanje
After all connections are made, press the power switch on the rear panel to turn on the device. The front display will illuminate.

Slika 4.1: Detaljno view of the front control panel and the rear panel connections, including power, audio outputs, and digital inputs.

Image 4.2: Diagram illustrating the I²S-H High-Specification Signal Input and its various connection modes for compatibility.
5. Uputstvo za upotrebu
5.1 Kontrolna tabla prekoview
The front panel features a display screen, standby switch, remote control receiver, and touch panel controls for navigation.
- Standby prekidač: Toggles the device between active and standby modes.
- Zaslon: Prikazuje trenutni ulaz, sample rate, volume, and filter settings.
- Prijemnik daljinskog upravljača: Receives signals from the included remote control.
- Dodirna ploča: Allows direct control of settings and input selection.
5.2 Osnovni rad
- Uključivanje/isključivanje: Use the standby switch on the front panel or the remote control to turn the unit on or off.
- Odabir ulaza: Use the input selection buttons on the front panel or remote to cycle through available digital inputs (USB, AES, Coaxial, Optical, I²S, LAN).
- Kontrola jačine zvuka: The analog outputs (RCA and XLR) have a fixed output level (2.5Vrms for RCA, 5.1Vrms for XLR). Volume control should be managed by your connected amplifier ili pre-amplifier.
5.3 Mrežni streaming
The X26III supports various network protocols for streaming audio:
- Podržani protokoli: Roon, Airplay, UPnP, NAA, Spotify.
- Konfiguracija: Network protocols can be configured via a web interface. Access the configuration web page by entering the device's IP address or "//x26.local" in a web browser on a PC connected to the same network. This interface allows you to enable or disable specific protocols and perform online firmware upgrades.

Image 5.1: Illustration of supported network streaming protocols (Roon, Airplay, UPnP, NAA, Spotify) and a screenshot of the web-bazirano upravljačko sučelje.
5.4 Digital Filter Settings
The X26III offers various digital filter options for PCM and DSD playback, as well as a NOS (Non-Oversampling) mode.
- PCM filteri: VIVID, GENTLE, COMPOSITE.
- DSD Filters: 47K, 50K, 60K, 70K.
- NOS Mode: ENABLE/DISABLE.
These settings can typically be adjusted via the front panel controls or the remote control. Refer to the on-screen menu for specific navigation.
5.5 I²S Line Sequence Adjustment
The I²S input supports different line sequence modes to ensure compatibility with various devices. Refer to the diagrams in Image 4.2 and the device's menu to select the correct mode (Mode 1, Mode 2, Mode 3, or Mode 4) for your source device.
6. Održavanje
To ensure the longevity and optimal performance of your Gustard X26III, follow these maintenance guidelines:
- čišćenje: Use a soft, dry cloth to clean the exterior of the device. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish.
- ventilacija: Ensure the device has adequate ventilation. Do not block the ventilation slots. Avoid placing the unit in enclosed spaces or on soft surfaces that may impede airflow.
- Okruženje: Uređaj koristite u čistom, suhom okruženju, dalje od direktne sunčeve svjetlosti, izvora topline i prekomjerne vlage.
- Rukovanje: Pažljivo rukujte uređajem. Izbjegavajte ispuštanje ili izlaganje jakim udarcima.
7. Otkrivanje problema
If you encounter issues with your Gustard X26III, refer to the following common problems and solutions:
- Nema napajanja:
- Check if the power cable is securely connected to both the device and the wall outlet.
- Verify that the rear panel voltagPrekidač je ispravno podešen (115V/230V).
- Uvjerite se da je utičnica funkcionalna.
- Check the fuse on the rear panel. If blown, replace with a fuse of the same type and rating.
- Nema izlaza zvuka:
- Confirm that the correct input source is selected on the X26III.
- Verify that the audio cables (RCA/XLR) are correctly connected to your amplifier/pre-amplifier.
- Osigurajte svoje amplifier/pre-amplifier is powered on and set to the correct input.
- Provjerite nivo jačine zvuka na vašem amplifier/pre-amplifier.
- If using a USB input, ensure the correct drivers are installed on your computer (if required).
- Problemi sa mrežnim streamingom:
- Provjerite je li Ethernet kabel sigurno spojen na LAN priključak.
- Verify that your network router is functioning correctly.
- Check the network configuration via the web interface (//x26.local) to ensure protocols like Roon, Airplay, UPnP, NAA, or Spotify are enabled.
- Restart the X26III and your network router.
- Displej ne radi:
- If the unit has power but the display is blank, try cycling the power.
- Obratite se korisničkoj podršci ako se problem nastavi.
Ako problem i dalje postoji nakon isprobavanja ovih rješenja, obratite se korisničkoj podršci za daljnju pomoć.
8. Specifikacije
8.1 Digitalni ulaz
- LAN Support Protocols: Roon, Airplay, UPnP, NAA, Spotify (Configurable via web page, upgradable online)
- LAN brzina: 100/1000Mbps
- 10M Clock (BNC): Input impedance 50 Ohm, 0dBm-20dBm, CMOS square wave 0.2V-3.3V, Sine wave 0.5V-3.3V
- USB sučelje: Supports PCM768K, DSD512, MQA full decoding (via XMOS XU216 USB AUDIO chip)
8.2 Analogni izlaz
- Frekvencijski odziv: 20-20kHz / +-0.3dB
- dinamički raspon: 128dB
- Odnos signal/šum: >127dB
- Preslušavanje kanala: 132dB na 10 kHz
- THD+N: <=0.0001% @ 1kHz
- IMD: ≈0.001% @ -1dbfs
- RCA izlazni nivo: 2.5Vrms (VOLUME FIXED)
- Izlazna impedancija RCA: 100Ω
- XLR Output Level: 5.1Vrms (VOLUME FIXED)
- XLR izlazna impedancija: 100Ω
- XLR Interface Definition: American Standard (1 ground, 2 hot, 3 cold)
8.3 Other Parameters
- Napajanje naizmeničnom strujom: AC115V/230V 50/60Hz (Manual Switch)
- Potrošnja energije: <25W
- Dimensions (excluding protrusions): Š330mm * D260mm * V65mm
- Dimenzije paketa: D420 * Š360 * V175mm
- Weight with Package: 10 kg (otprilike 22.05 funte)
- Broj modela stavke: GUSTARD X26III
- Proizvođač: GUSTARD
- Tehnologija povezivanja: Ethernet, XLR, RCA, BNC
- Kompatibilni uređaji: Smartphone, Tablet, Personal Computer, AmpLifier, Speaker
- Način audio izlaza: Stereo
- Broj kanala: 2

Image 8.1: A summary of the technical specifications for the Gustard X26III, including digital input capabilities, analog output performance, and general device parameters.
9. Garancija i podrška
Gustard products are designed for reliability and performance. While specific warranty details may vary by region and retailer, the manufacturer generally provides support for quality restoration for more than one year, covering repair and shipping costs for eligible issues.
For technical assistance, troubleshooting, or warranty inquiries, please contact your authorized dealer or the manufacturer's customer support. Support is typically available 24/7 to answer any questions you may have.
Za više informacija, možete posjetiti KGUSS Store.

