1. Introduction
The GUSTARD X18 DAC is a high-performance audio decoder designed to deliver exceptional sound quality. Featuring the ESS ES9038PRO chip, advanced CPLD technology, and XMOS XU216 processor, it supports a wide range of audio formats including MQA, PCM up to 768kHz, and DSD up to DSD512. With multiple input and output options, including Bluetooth 5.0 with LDAC, the X18 provides versatile connectivity for various audio setups.
2. Key Features
- ESS ES9038PRO Chip: Equipped with the ES9038PRO from ESS, featuring independent power and grounding for optimal sound performance.
- CPLD Complex Programmable Logic Device: Self-constructed digital integrated circuits with logic functions, clock management, 2nd PLL, digital shaping, DOP decoder, and PCM/DSD depop switch for excellent sound quality.
- ACCUSILICON Femtosecond Crystal Oscillator AS318-8: Two Hi-End audio oscillators from Accusilicon ensure ultra-low jitter.
- XMOS XU216 Processor: Supports PCM up to 768kHz and DSD up to DSD512.
- Bluetooth 5.0 Connectivity: Supports AAC, SBC, APTX, APTX LL, APTX HD, and LDAC (up to 24Bit/96KHz). Bluetooth can be disabled via the menu.
- MQA Full Decoding: Supports MQA playback via USB, AES, Coaxial, and Optical inputs.
- Adjustable OLED Screen: Features adjustable brightness and automatic sleep after 10 seconds of inactivity.
3. Specifications
Audio Formats Supported:
- USB: PCM: 44.1kHz-768kHz, 16bit-32bit; DSD (Native): DSD64-DSD512; DSD (DOP): DSD64-DSD256; MQA: Full decoding.
- IIS: PCM: 44.1kHz-768kHz, 16bit-32bit; DSD (Native): DSD64-DSD512; DSD (DOP): DSD64-DSD512; MQA: Not supported.
- AES, Coaxial, Optical: PCM: 44.1kHz-192kHz, 16bit-24bit; DSD (Native): DSD64-DSD512; DSD (DOP): DSD64-DSD512; MQA: Full decoding.
- Bluetooth: PCM: AAC/SBC/APTX/APTXLL/APTX HD/LDAC; DSD (Native): Not supported; DSD (DOP): Not supported; MQA: Not supported.
General Specifications:
- Frequency Response: 20Hz - 20kHz +/-0.08dB
- Line Out: Single end (RCA) 2.5V/rms @0dBFS; Balanced (XLR) 5.0Vrms @0dBFS
- XLR Pinout: 1 ground, 2 hot, 3 cold
- Dimensions (W x D x H): 220mm x 170mm x 50MM (excluding protruding parts)
- Weight with Packaging: 2.5KG
4. Package Contents
The GUSTARD X18 DAC package includes the following items:
- GUSTARD X18 DAC Unit
- Power Cord
- USB Cable
- Remote Control
- Bluetooth Antenna
5. Product Overview
Front Panel
The front panel features the power button, an OLED display, and a multi-function knob for navigation and volume control.
Image: Front view of the GUSTARD X18 DAC, showing the power button, OLED screen, and control knob.
Rear Panel
The rear panel provides various input and output connections for your audio system.
Image: Rear view of the GUSTARD X18 DAC, displaying various input and output ports including XLR, RCA, IIS, AES, Optical, Coaxial, USB, Bluetooth antenna connector, and power input.
6. Setup
- Unpacking: Carefully remove the GUSTARD X18 DAC and all accessories from the packaging.
- Placement: Place the DAC on a stable, flat surface away from heat sources and direct sunlight. Ensure adequate ventilation.
- Connect Bluetooth Antenna: Screw the provided Bluetooth antenna into the designated connector on the rear panel.
- Power Connection: Connect the power cord to the AC inlet on the rear panel and then to a suitable power outlet.
- Audio Output Connection: Connect the DAC to your amplifier or active speakers using either the balanced XLR outputs or the single-ended RCA outputs.
- Audio Input Connection: Connect your desired audio source (e.g., computer, CD player, streamer) to the appropriate input on the DAC (USB, Coaxial, Optical, AES, IIS, or Bluetooth).
7. Operating Instructions
Power On/Off
- To power on the device, press the power button on the front panel.
- To power off, press and hold the power button until the unit shuts down.
Input Selection
Use the multi-function knob or the remote control to cycle through available input sources (USB, IIS, AES, Coaxial, Optical, Bluetooth).
Volume Control
Rotate the multi-function knob to adjust the output volume. The volume level will be displayed on the OLED screen.
OLED Display Settings
The OLED screen's brightness can be adjusted via the menu. It will automatically enter sleep mode after 10 seconds of inactivity to preserve screen life.
8. Connectivity
USB Input
Connect your computer or other USB audio source using the provided USB cable. The X18 supports high-resolution PCM and DSD formats via USB.
Bluetooth Input
Enable Bluetooth on your source device and select "GUSTARD X18" from the list of available devices to pair. The X18 supports various high-quality Bluetooth codecs including LDAC.
IIS Input
The IIS input allows for direct digital connection to compatible audio sources, supporting high-resolution DSD and PCM signals.
AES, Coaxial, and Optical Inputs
These digital inputs provide versatile connectivity for CD players, network streamers, and other digital audio sources.
9. MQA Playback
The GUSTARD X18 DAC supports full MQA decoding via its USB, AES, Coaxial, and Optical inputs. When playing MQA content, the DAC will fully unfold the MQA file, allowing you to experience the original recording quality as intended by the artist.
10. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid using abrasive cleaners or solvents.
- Ventilation: Ensure that the ventilation openings are not blocked to prevent overheating.
- Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place.
11. Troubleshooting
- No Power: Check if the power cord is securely connected and the power outlet is functional.
- No Sound: Verify that the correct input source is selected on the DAC and your amplifier. Check all audio cable connections. Ensure the volume is not set to minimum or muted.
- Distorted Sound: Check the audio source and cables. Ensure the sample rate and bit depth settings on your source device are compatible with the DAC.
- Bluetooth Connection Issues: Ensure the Bluetooth antenna is properly attached. Try re-pairing the device. Disable and re-enable Bluetooth on both the DAC and your source device.
- OLED Screen Not Displaying: Check if the unit is powered on. The screen may be in automatic sleep mode; any operation should reactivate it.
12. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your retailer. Keep your proof of purchase for warranty claims.
