Hello,

If I want to use the Sympatico for SE input, I know that the "-" input should be grounded, and that R10 should be mounted with an 2k resistor.

But then the lower opamp (IC3.2) will not provide the same voltage swing as the upper opamp (IC3.1) only about 0.33x the voltage swing into Vin (-) of IC2.

In order to get the same voltage swing on IC3.2 the R11 should be changed to 3K. Am I correct ?

For optimum dynamic range and true balanced output, I think the output of IC1.1 and IC1.2 should be equal with opposite phase, when running SE input....


Best Regards
Flemming Bach
Denmark