RE Io best output: XLR / balanced output sounded best with my Krell. I have not tested much with my new tube monos.
Io input (from pickup) is perhaps also best served by balanced cable? I have only used RCA / single ended (Kimber KCAG). Comments?
Oldvinyl, very sensible advice. That was my own way, and I've not looked back. How did you upgrade the umbilical cables (and was it worth it)?
Csngl, interesting. I've found I prefer the Io's pure tube amplification all the way, to others I've heard.