The great thing about the 990 is it has both balanced and unbalanced outputs, and we will not know what their design is until further info is furnished by the Outlaws. However, based on their other gear, I believe that both outputs will perform as they should. As for what sounds best, I can only hear what my ears allow me (too many nearby artillery rounds at the outgoing and incoming end, and not on some sound stage)) so I really don't care what anyone else hears. With that said, for telco transmission we always sent program and video on unbalanced 75ohm for short distances, and balanced 124ohm for long differences.