Joe Malone wrote: But I am not sure what the unbalanced device is that the dingo is connected too?
But if it is passive then that is usually fine.
The unbalanced out feeds a 5k T pad rotary switch. I would like to have as much headroom as possible on the output. A +21dBu clip point at the unbalanced input would be ideal. I also changed R25 to 5k for correct termination of the pad.