Problem was my bad of course. I had Center Com out and Center Digital out to Sub Comm in and Digital in and then Sub Com out to 511 Patch. This was not correct.

Both Center Comm Out and Sub Comm Out should independtly return to 511 patch. Now Sub performs correctly at setting 2.

Appreciate the input from all.

Trinnov Altitude CI, M271, DSP8KSEU, DSP7200HCSE, DSP7200SEU, DSP5200SE, DSP3200, Magnetar UDP800 MKII, Kaleidescape Strato-Terra , Furman15PF, Creston Control, LG-G4,
M Kit since 1994