1. Introduction
The iFi Audio xDSD is a high-resolution portable Digital-to-Analog Converter (DAC) and headphone amplifier designed to elevate your audio experience. It supports a wide range of audio formats, including PCM up to 768kHz, DSD up to 512, and MQA, ensuring compatibility with the latest high-fidelity music. With its powerful headphone amplification and versatile connectivity options, the xDSD delivers exceptional sound quality for both wired and wireless listening.
This manual provides detailed instructions for setting up, operating, and maintaining your iFi Audio xDSD to ensure optimal performance and longevity.
2. Package Contents
Please verify that all items are present in your product package:
- iFi Audio xDSD Unit
- USB 3.0 Cable (Blue)
- USB-A to USB-B Adapter
- USB-A to USB-C Adapter
- Optical Adapter
- Velcro Strips (for attaching to devices)
- Soft Carrying Pouch
- Quick Start Guide
- Warranty Card
Figure 2.1: Included accessories and the xDSD unit.
3. Product Features
- True Native Playback: Supports DSD, DXD, and PCM formats for uncompromised audio fidelity.
- Powerful Headphone Amplifier: Delivers robust output to drive a wide range of headphones.
- Long Battery Life: Integrated lithium-polymer battery provides up to 10 hours of playback.
- Versatile Connectivity: Features USB, S/PDIF (optical/coaxial), and Bluetooth inputs.
- MQA Support: Ready for MQA (Master Quality Authenticated) playback.
- Wireless Freedom: Bluetooth with aptX and AAC codecs for high-quality wireless audio.
- S-Balanced Output: 3.5mm headphone output designed for balanced connection benefits with single-ended headphones.
- Advanced Analogue Signal Processing (ASP): Includes 3D+ and XBass+ features to enhance soundstage and bass response.
- Pure Analogue Volume Control: Maintains signal integrity across all volume levels.
- Digital Filter Selection: 'Measure' and 'Listen' digital filter options for tailored sound.
- Durable Construction: Extruded Magnesium-Aluminum body for robust and lightweight design.
4. Controls and Connections
4.1 Front Panel
Figure 4.1: xDSD Front Panel
- Volume Knob / Power Button: Rotates to adjust volume. Press and hold for 2 seconds to power on/off. Quick press to mute/unmute.
- 3.5mm Headphone Output: Connect your headphones here.
- Input LEDs (kHz): Indicates the current sampling rate and input mode.
- 3D+ Button: Activates/deactivates the 3D+ soundstage enhancement.
- XBass+ Button: Activates/deactivates the XBass+ bass enhancement.
4.2 Rear Panel
Figure 4.2: xDSD Rear Panel
- S/PDIF Input: For connecting optical or coaxial digital audio sources.
- USB-A Input: For connecting to computers or mobile devices via USB.
- Micro USB (5V) Power Input: For charging the device.
- Filter Switch (Measure/Listen): Selects between two digital filter modes. 'Measure' provides a more technically accurate sound, while 'Listen' offers a more natural and musical presentation.
5. Setup
5.1 Charging the xDSD
Before first use, fully charge the xDSD. Connect the supplied USB cable to the Micro USB (5V) port on the rear panel and plug the other end into a USB power adapter (not included) or a computer's USB port. The LED indicator will show charging status.
5.2 Connecting to a Source Device
The xDSD offers multiple input options:
- USB Connection (Computers/Smartphones): Use the supplied USB cable and appropriate adapters to connect the xDSD's USB-A input to your computer or smartphone. Ensure your device's audio output is set to the xDSD.
- Bluetooth Connection: For wireless audio, ensure the xDSD is in Bluetooth mode (see Section 6.2). Pair it with your Bluetooth-enabled device.
- S/PDIF Connection: Use an optical or coaxial cable (not included) to connect your digital audio source to the S/PDIF input.
Figure 5.1: xDSD Connectivity Options
5.3 Connecting Headphones
Plug your headphones into the 3.5mm headphone output on the front panel of the xDSD.
Figure 5.2: xDSD connected to a smartphone and headphones.
6. Operating Instructions
6.1 Power On/Off and Volume Control
- Power On/Off: Press and hold the volume knob for approximately 2 seconds. The LED around the volume knob will illuminate.
- Volume Adjustment: Rotate the volume knob clockwise to increase volume and counter-clockwise to decrease volume.
- Mute/Unmute: Briefly press the volume knob to mute or unmute the audio output.
6.2 Switching Input Modes
To switch between USB, S/PDIF, and Bluetooth inputs:
- Power off the xDSD.
- Press and hold the volume knob for approximately 4 seconds. The input LED will cycle through the available modes. Release the button when the desired mode is indicated.
6.3 Bluetooth Pairing
When in Bluetooth mode:
- Press and hold the XBass+ / 3D+ button for 2 seconds to enter pairing mode. The Bluetooth LED will flash.
- On your source device (e.g., smartphone), search for Bluetooth devices and select 'iFi xDSD' to pair.
- Once paired, the Bluetooth LED will remain solid.
6.4 Using 3D+ and XBass+
- 3D+: Press the 3D+ button to activate or deactivate the soundstage enhancement. This feature aims to create a more spacious and immersive listening experience.
- XBass+: Press the XBass+ button to activate or deactivate the bass enhancement. This feature provides a deeper and more impactful bass response without muddying the mid-range.
6.5 Digital Filter Selection
The xDSD features a 'Measure/Listen' switch on the rear panel:
- Measure: This filter provides a more linear frequency response, ideal for critical listening and audio analysis.
- Listen: This filter offers a slightly warmer and more natural sound signature, often preferred for general music enjoyment.
7. Maintenance
- Cleaning: Use a soft, dry, lint-free cloth to clean the surface of the xDSD. Avoid using abrasive cleaners or solvents.
- Storage: When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Handling: Handle the xDSD with care. Avoid dropping it or subjecting it to strong impacts.
- Battery Care: For optimal battery life, avoid fully discharging the battery frequently. If storing for a long time, charge it to about 50% every few months.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Battery is depleted. | Connect the xDSD to a USB power source and allow it to charge for at least 30 minutes before attempting to power on. |
| No sound output. | Incorrect input selected. Volume is too low or muted. Headphones not properly connected. Source device not playing audio or outputting to xDSD. | Verify the correct input mode is selected (USB, Bluetooth, S/PDIF). Increase volume or unmute the device. Ensure headphones are fully plugged into the 3.5mm jack. Check audio playback on your source device and confirm it's outputting to the xDSD. |
| Bluetooth pairing issues. | xDSD not in pairing mode. Previous pairing conflict. Source device Bluetooth issues. | Ensure xDSD is in Bluetooth mode and press/hold the XBass+/3D+ button for 2 seconds to enter pairing mode. On your source device, 'forget' or 'unpair' the xDSD and attempt to pair again. Restart your source device's Bluetooth function or the device itself. |
| Hissing or static noise. | Interference from other devices. Ground loop issues. High sensitivity headphones. | Move the xDSD away from other electronic devices. Try a different USB port or power adapter. Some highly sensitive headphones may exhibit a slight hiss, especially at very low volumes. This is often normal for high-gain amplifiers. |
9. Specifications
Figure 9.1: xDSD Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | 4336299358 |
| Dimensions (L x W x H) | 3.74 x 2.6 x 0.75 inches (95 x 67 x 19 mm) |
| Weight | 4.5 ounces (127 g) |
| Output Power | 0.5 Watts (500mW) |
| Number of Channels | 2 |
| Battery Type | Lithium Polymer |
| Battery Life | Up to 10 hours |
| Supported Formats (USB) | PCM 768kHz / DSD512 / DXD / MQA |
| Supported Formats (S/PDIF) | PCM 192kHz / DSD64 (DoP) |
| Bluetooth Codecs | aptX, AAC |
| Material | Magnesium-Aluminum Alloy |
10. Warranty and Support
10.1 Warranty Information
The iFi Audio xDSD comes with a 12-month limited warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or natural disasters.
Please retain your proof of purchase for warranty claims.
10.2 Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please visit the official iFi Audio website or contact their customer support team. Contact details can typically be found on the iFi Audio website or on the warranty card included with your product.
