The manual states that the unbalanced analogue outs can be configured to any pair of:

Main L/R; Centre/Sub; Sides; Rear; or Subs.

Of course, the manual is not always right but...

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.