Thanks for your reply @elliottbnewcombjr. My McIntosh C48 preamp has outputs on RCA #1 and RCA #2. It also has balanced outputs (XLR) that go to my McIntosh power amp.
I recall when I set the C48 up, it said you could not use a balanced output (XLR) with and unbalanced output (RCA)
I have mapped my Aurender music server/streamer to to the ’Server’ function and ’Server’ points to XLR out instead of RCA #1 output.