I started using the 8 position. Each about 1 to 1.5 feet apart. I use room instead of seating position because seating is in an L shape around the room. I start in center of room with mic on tripod a couple of inches above the height of the high backs, with the next 2 positions to the left and right of there. The next 3 positions the same, except about a foot closer to mains. The last 2 about 1.5 feet back and between the middle 3 positions.

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing