Sundance SMT381 2004 - Manual (Page 23)

R1 R1
TP101
+
-
Output
Connector
Figure 7. Option 1 for the SMT381 analog output stage.
Option 2
Differential DC coupled output with + and – channels going to separate connectors
R2 R2
+
-
Output
Connector
Output
Connector
Figure 8. Option 2 for the SMT381 analog output stage.