Has 3 options:
Both Mono (1 & 2 can be set at different distances)
Stereo (Left side of room and Right side of room)
Front Back (Front of room and Back of room)
So guessing that means what they are going for is if speakers set small and crossover setup high at 120hz or 200hz , those upper frequencies may localize left right or front back during a movie
That’s how it was explained on AVS Forum at least.
Just use the Mono setting and skip the other ones….