iFi Audio is an AMR (Abbingdon Music Research) company based in the UK and they specialize in digital analogue converters (DACs) and amplifiers. I would like to thank iFi Audio for the review unit of xDSD. More information can be found on iFi Audio .



  • USB Ouput: Up to PCM768kHz & DSD512 (24.6/22.6MHz)
  • S/PDIF Coaxial and Optical Input: Up to 192kHz/24Bit
  • Dynamic Range: > 113dB (A)
  • Volume Control: -101dB…0dB in 1dB steps
  • Output power:
    > 2.82V/500 mW @ 16 Ohm
    > 3.7V/270mW @ 50 Ohm
    > 3.8V/48 mW @ 300 Ohm
    > 3.8V/24 mW @ 600 Ohm
  • Line out Level: > 2.1V @ 0dBFS (& 0dB Volume)
  • THD &N (1V/16R): < 0.005%
  • Output Impedance: < 1 Ohm
  • Battery: 3.8V/2200mAh
  • Dimensions: 95 (l) x67 (w) x19 (h) mm
  • Weight: 127g (0.28 Ibs)

Unboxing & Accessories

The xDSD comes in a white package that sports the brand logo. It has protective cover that shows the brand name, product series, image of the xDSD, product name and stickers (Hi-Res Audio, DSD 512, MQA, bluetooth & 3D+/XBass+). There are specifications on the back of the protective cover. After opening the package, there are the xDSD, information guide, soft pouch, velcro stick on, Toslink to Mini optical adapter, Micro USB charging cable, USB-A to USB-B cable, USB-A to USB-A cable and USB-A to USB-B adapter.



Page 2: DAC/AMP Build & Design, Functionalities