Richie,
I have the A and B channels set so i can run all nine speakers at the same time when set to A & B channels or I can run only the A set or B set in the 7.1 mode. I hope you understand what I am saying.
Lee

Axiom M80Ti(4) Axiom VP150(1) Axiom Qs8(4) Axiom M22ti(2) Axiom M3ti(2)