It just hadn't occurred to me to use boundary mics for choir behind an orchestra. Sounds like a great way to get smooth, wide coverage with the mics, while also drastically reducing bleed from the orchestra.

I have four 4060/1 DPA mics, with the boundary mounts that comes with their kits. If I want to mount them vertically, attached to plexiglass, between the orchestra and choir, how large a sheet of plexiglass (for each mic) would be required?

Thank you.

DG