861 is Type-2.
It was at my first test set as all analogue,so no wonder that failed.
Now typed to type-2 and fetched that back.

Both the pairs work if i make one master and hook the op to the Left and Right connection on the 861

So it seem the AC-12 and the DSP3100 do work, only not when i have them all as slave.

Pair-1 now front left and right playing
Pair-2 as rear surrounds do not come on line.

When i swap over the cables and make the right speaker (connected to the master interface onthe 861) the master that pair works as well.

Sold all M equipment