Sure? I did not find the case on their site...
As far as I understand, "balanced" means here how the signal is processed internally in the analog realm - but
I might be wrong here or balanced output can be taken from one of the pin headers..
Would make more sense as 95% of all home users are using single ended RCA.
The case first appeared in the
hardware volume thread with the comment "It's Draft". I took it as one for the current model board, including a rotary encoder for volume so people wouldn't need to DIY one as discussed earlier in that thread, and a
later post confirmed it would work with the existing Tone Board. So far as I know the 'specification'
@LostOne__ provides is a combination of the changes Khadas staff have mentioned individually in different threads, not some announced specification. A single picture and the text "It’s on the way, but might need some more time ;-) I cannot post any other details at the moment." has triggered a load of speculation.