Sure there is a schematic. Its in my head somewhere.
There will be an official schematic at some point.
There is a bunch of different ways to build it including
single ended only, and balanced/single ended
The on board buffer which you don't have to use is
an lme49710 driving an lme49600 closed loop with
a tl071 as the servo, optionally the lt1150.
The onboard single ended to balanced is an opa1632
with a tl071 servo. you don't have to use that either.
multiamp works for both. Single ended there are
x1 buffer opamps.
Clear as mud right?
There are a couple of people on amb's forum that think i have
sold out to ic's... But they should hear the thing. Just about
impossible to tell between the chips and the multiamp.