26-May-2019, 16:23
This should work. You might need to open a case with support. But in the meantime, try configuring mono sub from master, and use a Y cable if you have one handy.
Oppo-203 / SonicTransporter i7 Roon Core ->Trinnov Altitute-16->TAD M2500MK-1 -> TAD CR-1