I bought a Pro to essentially replace Roon + PC as my streaming source as I can use the DSP in the Wiim app to EQ my headphones, plus it's a lot more portable around the house than a large PC is. However, I haven't done my diligence sufficiently as I have a problem with connecting them digitally. The pro has coax or optical digital out, the JDS only had USB-B input! Is there such a thing as a coax to USB-B cable? I doubt it, so wishing I'd put a pro plus now with the better DAC. Or replace the lot with a DX5-II.....