You should only have one master use the centre. All others as slaves. Comms from 565 to centre (M) then onto left across to right and from right to sub (all S).

Digital feed from 565 1&2 to left and from left to right

Digital feed from 565 3&4 to centre and on to sub.

Set 565 to Type 3

Should get sound.

1) MS200, G65, Revivers, DSP5000.2, DSP5000C.2, DSP3100, D1500, SME10/IV.

2) Mac Mini (Roon), Explorer 2, Sennheiser HD6XX.