High voltage, hmm maybe worth a shot but there's this
http://www.diyaudio.com/forums/digital-source/195483-zen-cen-sen-evolution-minimalistic-iv-converter-188.html#post4961030
And, I heard back from someone that had it working with the BIII albeit in single ended config he said it sounded weak and sold the setup. Then reading a bit further someone else reported the same. There are two people that may have working ver 18 boards that they're willing to sell and are to get back to me soon.
Let me do some more research