Hi AxilHello Phil,
I have purchased the HD DAC as preowned unit and was also missing the jumpers at that time.
I made some trial with my balanced line stage I have used at this time, but stopped the trials after becoming aware of the missing jumper.
This took some time be course Nagra is not giving any information about the output transformer in their manual ?
I then upgraded the Nagra HD DAC with the newer Nagra Classic DAC digital engine and moved to the Classic Preamp, so have no further need to connect both units balanced.
Best
Axel
I have just done the upgrade and changed to the classic PSU... I thought it was fantastic leap in quality , better than expected.
Still running it balanced .. I should swap it out one day too see if there is a change in SQ
Cheers
Phil