No, Jason, the Denon A & B surround option can't be used with main speakers in an other zone. That A & B option sends side surround material to both sets of speakers, and can accommodate, for example, someone who'd like to switch between monopolar and multipolar surround speakers on different types of material. You, of course, want front speaker, not surround, sound in the other room.

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Enjoy the music, not the equipment.