Aune S18 EVO DAC Instruction Manual

1. Produktet er slutview

The Aune S18 EVO is a high-performance Digital-to-Analog Converter (DAC) designed for Hi-Fi audio systems, PCs, and home audio setups. It features advanced technologies such as a 10MHz clock input, 32bit/768kHz/DSD512/MQA support, dual AKM AK4497 DAC chips, and 3rd-generation PLL/Clock Sync technology for precise audio reproduction.

Figur 1: Aune S18 EVO DAC front and rear panel overview. This image illustrates the various controls and connection ports on the device, including volume controls, input selection buttons, display, XLR/RCA outputs, and digital inputs.

2. Vigtige sikkerhedsoplysninger

Voltage Krav: The Aune S18 EVO DAC must be used with a 110V power supply. Connecting the device to an excessive voltage will cause damage and void the warranty. Always verify your power source voltage før du tilslutter enheden.

Ventilation: Sørg for tilstrækkelig ventilation omkring enheden for at forhindre overophedning. Bloker ikke ventilationsåbningerne.

Fugtighed: Keep the device away from water or excessive moisture. Do not operate with wet hands.

Rensning: Afbryd strømmen før rengøring. Brug en blød, tør klud. Brug ikke flydende rengøringsmidler eller aerosolrengøringsmidler.

3. Opsætning og forbindelser

3.1 Betjeningselementer på frontpanelet

• Lydstyrke op/ned: Justerer udgangslydstyrken.
• Short Press (Left/Right Arrows): Switches input channels.
• Long Press (Left/Right Arrows): Mutes/restores memorized volume output.
• Short Press (V/S button): Switches filter mode.
• Long Press (V/S button): Activates standby/wake mode.
• Vise: Viser aktuel input, lydstyrke og andre statusoplysninger.

3.2 Bagpaneltilslutninger

• XLR (R/L) Output: Balanceret analog lydudgang.
• RCA-udgang: Ubalanceret analog lydudgang.
• AES input: Digital audio input (AES/EBU).
• Optisk indgang: Digital audio input (TOSLINK).
• Koaksial indgang: Digital audio input (S/PDIF).
• USB-indgang: Connects to a computer or other USB audio source.
• External Clock Input (10MHz): For connecting an external 10MHz clock source for enhanced synchronization.
• Bluetooth Antenna Interface: Til tilslutning af den medfølgende Bluetooth-antenne.
• Afbryderen: Tænder eller slukker for enheden.
• Strømgrænseflade: Connects to the 110V AC power adapter.

3.3 Tilslutning af lydkilder

Connect your digital audio sources (PC via USB, CD player via Coaxial/Optical, etc.) to the corresponding input ports on the rear panel. For Bluetooth, attach the antenna and pair your device as described in Section 4.4.

3.4 Tilslutning til AmpHøjttalere/højttalere

Connect the S18 EVO's RCA or XLR outputs to your amplifier or active speakers. Use XLR connections for optimal performance if your amplifier supports them.

4. Betjening

4.1 Tænd/sluk

Flip the power switch on the rear panel to the 'ON' position to power on the device. To turn off, flip the switch to 'OFF'. For temporary standby, long-press the V/S button on the front panel.

4.2 Indgangsvalg

Short-press the left or right arrow buttons on the front panel to cycle through available input channels (USB, Coaxial, Optical, AES, Bluetooth, etc.). The selected input will be shown on the display.

4.3 Lydstyrkekontrol

Use the 'Volume Up' and 'Volume Down' buttons on the front panel to adjust the output volume. The current volume level is indicated on the display.

4.4 Filter Modes

The S18 EVO features custom DAC chip filters. Short-press the V/S button to cycle through different filter modes, optimizing the sound characteristics for your preference. Refer to the display for the active filter mode.

4.5 Bluetooth -parring

To pair a Bluetooth device, select the Bluetooth input. The S18 EVO will enter pairing mode. On your mobile device or computer, search for available Bluetooth devices and select 'Aune S18 EVO'. Once connected, audio will stream wirelessly to the DAC.

5. Key Technologies

5.1 3rd-Gen Fully Synchronized PLL Technology

The S18 EVO integrates a 3rd-generation Phase-Locked Loop (PLL) core with full-clock synchronization. This technology dynamically tracks and eliminates errors between the reference and feedback clocks, significantly reducing clock signal jitter to the femtosecond level. This ensures a highly unified time reference across all units during high-speed data processing, providing a stable, pure, and synchronized clock foundation for the entire system.

Figur 2: Illustration of the 3rd-Gen PLL Core, a key component for precise clock synchronization.

5.2 XMOS Optimization for USB Audio

Unlike conventional USB DAC designs, the S18 EVO employs an ultra-low-jitter PLL to supply superior clock signals to the XMOS chip. This approach, combined with Aune's customized drivers, ensures full-device synchronization and unlocks the true potential of XMOS for high-fidelity USB audio reproduction.

Figur 3: Nærbillede view of the XMOS chip, central to the S18 EVO's USB audio processing.

5.3 Full-Channel IIS Synchronized Direct-to-DAC Architecture

All digital inputs (AES, optical, and coaxial) are reconditioned through digital synchronization technology combined with a low-jitter PLL. This ensures that all signals are fed into the DAC via the IIS interface, delivering higher fidelity, more natural, and truer sound reproduction across every input channel.

Figur 4: Diagram illustrating the IIS synchronized direct-to-DAC architecture for various digital inputs.

5.4 Hi-Fi-Grade Bluetooth with PLL Clock Synchronization

Conventional Bluetooth signals often exhibit high jitter. The S18 EVO utilizes Aune's in-house Bluetooth + PLL technology to recondition the Bluetooth digital signal before it reaches the DAC. This process achieves high-fidelity audio even when streaming via Bluetooth.

5.5 Dual AK4497 DACs with Precision Synchronization

The S18 EVO employs an external PLL to provide a clock reference for its two AK4497 DAC chips. This, combined with mirrored circuitry, layout, and components, ensures highly coordinated left and right channels, recreating a cohesive soundstage.

Figur 5: A distinctive global clock synchronization architecture diagram, showing how various inputs are processed and synchronized before reaching the DACs.

6. Vedligeholdelse

• Rensning: Use a soft, dry, lint-free cloth to clean the exterior of the unit. Avoid abrasive cleaners, solvents, or chemical sprays.
• Ventilation: Sørg for, at ventilationsåbningerne er fri for støv og forhindringer for at opretholde korrekt luftgennemstrømning.
• Opbevaring: Når enheden ikke er i brug i længere perioder, skal den opbevares køligt og tørt, væk fra direkte sollys og ekstreme temperaturer.
• Håndtering: Håndter enheden forsigtigt. Undgå at tabe den eller udsætte den for hårde stød.

7. Fejlfinding

• Ingen strøm:
  • Ensure the power cable is securely connected to both the S18 EVO and a working 110V power outlet.
  • Kontroller, at tænd/sluk-knappen på bagpanelet er i 'ON'-positionen.
  • Kontroller, at stikkontakten fungerer.
• Ingen lydoutput:
  • Confirm the correct input source is selected on the S18 EVO.
  • Check all audio cables (RCA, XLR) are securely connected between the S18 EVO and your amplifier/højttalere.
  • Ensure the volume level on the S18 EVO is not muted or set too low.
  • Bekræft din ampat højttalerne er tændt og indstillet til den korrekte indgang.
  • If using USB, ensure the correct audio output device is selected in your computer's sound settings and Aune's customized drivers are installed.
• Problemer med Bluetooth-forbindelse:
  • Sørg for, at Bluetooth-antennen er korrekt fastgjort.
  • Verify the S18 EVO is in Bluetooth input mode and pairing mode is active.
  • Deaktiver og genaktiver Bluetooth på din kildeenhed.
  • Move your source device closer to the S18 EVO to reduce interference.
• Forvrænget lyd:
  • Tjek for løse kabelforbindelser.
  • Ensure the source audio file ikke er beskadiget eller af lav kvalitet.
  • Bekræft sample rate and bit depth settings on your source device match the S18 EVO's capabilities.
  • Try a different input source to isolate the problem.

8. Specifikationer

9. Garantioplysninger

The Aune S18 EVO DAC comes with a 2 års garanti from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or connection to incorrect voltage (e.g., exceeding 110V). Please retain your proof of purchase for warranty claims.

10. Kundesupport

For technical assistance, warranty claims, or any questions regarding your Aune S18 EVO DAC, please contact Aune customer support through their official website or the retailer from whom you purchased the product. Please have your model number (S18 EVO) and proof of purchase ready when contacting support.