I had the same problem, but the Yggy has 2 sets of RCA outputs. I checked with Schiit and they said they were directly connected together in parallel. So put the left in one set and the right in the other. It works fine.
Yggy RCA Interconnects
Wasn't sure whether to post this in digital or cable.
I just got a Schiit Yggy and a PrimaLuna HP integrated. I've always used XLR interconnects, but now I have to use RCAs. I purchased a set of SR Atmosphere UEF cables. The cable ends are too big to properly fit the Yggy. Looking at the cable ends in the Yggy, they are not parallel. I have to change this. Does anyone have recommendations on RCA cables that will fit properly? I'm considering Audience, but I'm not sure whether their ends are smaller or not.
Thanks in advance.