Waking the thread from the dead ...
My exstata gave me a shock some days ago!
I was listening to some music (moderate levels) with my Lambda Pro when
suddenly the sound started distorting on the left channel and I got some
deep hum too.
Unplugged the phones of course and tested them on my srm xh where
they worked properly - so the extata seems to be the problem.
I ran through the setup again today and checked all the voltages and
found nothing too alarming. Offset was about 5V on one channel, what
does not seem to be critical (adjusted back to below 1V nonetheless).
Now I'm kind of scared to plug in my phones again since I don't have
any clue where the problem might have been.