Aune X8 18th Anniversary Edition-BT DAC User Manual

1. Introdución

The Aune X8 18th Anniversary Edition-BT is a high-performance Digital-to-Analog Converter (DAC) designed for audiophiles. This device features high-resolution audio decoding up to 32bit/768k and DSD512, a unique op-amp replaceable design for sound customization, and multiple input/output options including USB, coaxial, optical, Bluetooth 5.1 (with aptX-HD and LDAC support), RCA preamp/line out, and balanced TRS output. This manual provides detailed instructions for setup, operation, and maintenance of your Aune X8 XVIII-BT DAC.

Imaxe 1.1: Fronte view of the Aune X8 18th Anniversary Edition-BT DAC.

2. Produto rematadoview

2.1 Características principais

• Audio de alta resolución: Supports up to 32bit/768k PCM and DSD512.
• Op-Amp Deseño substituíble: Allows users to customize sound characteristics by replacing the dual op-amp.
• FPGA Core Design: Utilizes FPGA technology for purer digital signals and enhanced sound quality.
• Entradas versátiles: USB, Optical, Coaxial, and Bluetooth 5.1 (aptX-HD, LDAC).
• Saídas múltiples: RCA Preamp Out, RCA Line Out, and Balanced TRS Preamp Fóra.
• 7 Filter Modes: Provides various sound filtering options.

2.2 Controis e conexións

Image 2.1: Front and Rear Panel Layout of the Aune X8 XVIII-BT DAC.

Panel frontal:

• Botón de selección: Used to cycle through input sources.
• Luces indicadoras: Display the currently selected input (USB, OPT, COAX, A, B, C, D, MN).
• Botón de volume: Controls the output volume for the preamp saída.

Panel traseiro:

• TRS Output (L/R): Balanced TRS preamp output for professional audio connections.
• RCA Preamp Out (L/R): Variable RCA output for connecting to power amplifiers ou altofalantes activos.
• Saída de liña RCA (E/D): Fixed level RCA output for connecting to integrated amplificadores ou preamplevantadores.
• Entrada coaxial: Entrada de son dixital.
• Entrada óptica: Entrada de son dixital.
• Entrada USB: For connecting to computers or portable devices.
• Bluetooth Antenna (ANT): For Bluetooth signal reception (Bluetooth version only).
• Power Switch (SW): Acende ou apaga o dispositivo.
• Power Input (DC): Conéctase ao adaptador de corrente fornecido.

3. Configuración

3.1 Conexión inicial

1. Conecte o adaptador de corrente fornecido ao Entrada de alimentación (DC) no panel traseiro e despois a unha toma de corrente axeitada.
2. Connect your audio output device (e.g., power amplifier, active speakers, headphone amplifier) to the appropriate output on the X8 XVIII-BT DAC:
   • For variable output, use RCA Preamp Fóra or TRS Output.
   • For fixed line level output, use Saída de liña RCA.

3.2 Conexión de fontes de entrada

The Aune X8 XVIII-BT DAC supports various digital audio inputs:

• Entrada USB: Connect a USB cable from your computer, smartphone, tablet, or portable music player (with appropriate cables) to the Entrada USB no panel traseiro.
• Entrada óptica: Connect an optical cable from your digital audio source (e.g., TV, CD player, game console) to the Entrada óptica.
• Entrada coaxial: Connect a coaxial cable from your digital audio source to the Entrada coaxial.
• Entrada Bluetooth: Ensure the Bluetooth antenna is securely attached to the ANT connector on the rear panel.

Image 3.1: Multi-Connectivity Diagram.

4. Funcionamento

4.1 Encendido/apagado

Xire o Power Switch (SW) on the rear panel to the 'ON' position to power on the device. Flip it to 'OFF' to power off.

4.2 Selección de entrada

Preme o Botón de selección on the front panel to cycle through the available input sources (USB, OPT, COAX, Bluetooth). The corresponding indicator light will illuminate to show the active input.

4.3 Control de volume

O Botón de volume on the front panel controls the output level of the RCA Preamp Fóra e TRS Output. Rotate clockwise to increase volume and counter-clockwise to decrease volume. The Saída de liña RCA provides a fixed output level and is not affected by the volume knob.

4.4 Filter Modes

The X8 XVIII-BT DAC features 7 digital filter modes. These modes can be selected to fine-tune the sound characteristics according to your preference. Refer to the product's detailed specifications or Aune's official website for specific instructions on how to cycle through and select these filter modes, as the method may vary.

4.5 Emparellamento Bluetooth (só versión Bluetooth)

1. Ensure the Bluetooth antenna is connected.
2. Seleccione a entrada Bluetooth usando o botón Botón de selección.
3. No teu dispositivo móbil (teléfono intelixente, tableta, portátil), activa o Bluetooth e busca os dispositivos dispoñibles.
4. Select "Aune X8 XVIII-BT" (or similar) from the list of devices to pair.
5. Once paired, audio from your device will be streamed to the X8 XVIII-BT DAC.

Image 4.1: Bluetooth connectivity with portable devices.

5. Funcións avanzadas

5.1 Op-Amp Substitución

The Aune X8 XVIII-BT DAC allows for the replacement of its dual op-amp, enabling users to customize the sound signature. This feature is intended for experienced users. Exercise caution when handling electronic components.

1. Ensure the device is powered off and disconnected from the power supply.
2. Abra o dispositivo con coidado casing according to the specific instructions provided with your unit or by Aune support.
3. Locate the existing dual op-amp.
4. Using an appropriate tool (e.g., op-amp puller), gently remove the op-amp. Note its orientation.
5. Insert the new compatible dual op-amp, ensuring correct orientation and pin alignment. Do not force the op-amp no seu lugar.
6. Pecha o dispositivo casing de forma segura.

Image 5.1: Op-Amp replaceable design.

Different dual op-amps can significantly alter the sound characteristics. Experiment with various compatible op-amps to find your preferred sound.

5.2 FPGA Core Design

The X8 XVIII-BT DAC incorporates Aune's proprietary FPGA (Field-Programmable Gate Array) technology. This design is implemented to process digital signals with high precision, resulting in a purer and more accurate audio reproduction.

Image 5.2: Illustration of FPGA Core Design.

6. Connectivity Scenarios

6.1 PC HiFi Setup

Connect the X8 XVIII-BT DAC to your computer via USB. This allows the DAC to process high-resolution audio files (up to 32bit/768k DSD512) from your computer, enhancing the sound quality for active speakers or headphone amplevantadores.

Image 6.1: PC HiFi setup with Aune X8 DAC.

6.2 Coaxial/Optical Input Setup

Utilize the coaxial or optical inputs to connect to digital transports or players. This setup supports PCM up to 384k and DSD128, providing a high-quality audio system without requiring a PC.

Image 6.2: Coaxial/Optical input setup.

6.3 Portable Device Connectivity

The X8 XVIII-BT DAC can be connected to various portable devices such as iPhones, Android phones, iPads, or portable music players via USB (corresponding cables may be needed). This provides an instant improvement in sound quality for your mobile audio experience.

Image 6.3: Portable device connectivity.

7. Especificacións

Imaxe 7.1: Características principaisview.

8 Solución de problemas

• Sen enerxía: Ensure the power adapter is securely connected to both the device and a working power outlet. Check the power switch on the rear panel.
• Sen son:
  • Verify that the correct input source is selected on the DAC.
  • Check all audio cable connections between the DAC and your amplifier/altofalantes.
  • If using preamp outputs, ensure the volume knob is not set to minimum.
  • Confirma que o teu ampos amplificadores/altofalantes estean acendidos e configurados na entrada correcta.
• Intermittent Audio/Dropouts:
  • Check the quality and secureness of your digital input cables (USB, optical, coaxial).
  • For Bluetooth, ensure your source device is within range and there is no interference.
  • Try a different input source or cable to isolate the issue.
• Problemas de conexión Bluetooth:
  • Ensure the Bluetooth antenna is properly attached.
  • Make sure the DAC is in Bluetooth input mode.
  • Forget the device on your source device's Bluetooth settings and attempt to re-pair.
• Distorsión do son:
  • Check if the input signal level is too high, causing clipping.
  • Asegúrate de que todas as conexións estean seguras e libres de danos.
  • If using a replaceable op-amp, ensure it is correctly seated and compatible.

9. Mantemento

• Limpeza: Usa un pano suave e seco para limpar o exterior do dispositivo. Evita o uso de produtos de limpeza líquidos ou materiais abrasivos.
• Colocación: Place the device on a stable, flat surface with adequate ventilation. Avoid direct sunlight, heat sources, and high humidity.
• Xestión de cables Ensure cables are not excessively bent or strained to prevent damage.

10. Garantía e soporte

10.1 Información da garantía

All Aune products come with a 2-year after-sales service. This warranty covers manufacturing defects and issues arising from normal use.

10.2 Servizo posvenda

Aune provides a comprehensive after-sales system. Should you encounter any problems during the use of your product, please contact Aune customer support. They will assist you promptly and provide a satisfactory resolution.

10.3 Product Condition

All Aune items are new and carefully packaged. If you observe any signs of use upon receiving your product, it may be due to transit or warehouse handling. Please communicate with customer support to address such concerns.

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