Is the RCA set to 6v when you thought you had it lower? If so, could this this... I'm at DAC sw version 2.01, and upsampler version 2.01 also...
On your iPad have you clicked the update button (while inside the dcs app)? If you click on the gear icon (upper right) then click on information, then on version, you'll see a check for updates at the bottom.
I'm on app version 1.4 ...
Is it even possible to have the RCA set to 6v while the balanced is 2v? As far as I know there's only one global setting for output voltage.
I don't think I've noticed the update button (or if I did it was when I first got my Upsampler and have since forgotten about it). I'll check it tonight.
Thanks!