Using both headphone outputs of Bartok simultaneously

[Ermos (Erno)]

Page 12 of the Bartók manual:

For the balanced and unbalanced outputs on the rear of Bartók this is no problem:

[FAQ] Can I use the balanced and unbalanced outputs simultaneously?

Yes, this will work. The balanced (XLR) and unbalanced (RCA) outputs use separate output stages, so one has no impact on the other. You can use both simultaneously without issue.