1. We just pulled our subs out from under the stage. We hated them there.
2. We put them on the stage and the musicians loved them. they felt a lot more "presence" that way, and we had a nicer sound in the house. I think the big problem with them under the stage on the floor was a bass wave needs a lot of room to fully form, and we didn't get a nice sound until towards the back of the sanctuary.
3. We removed the house feed to the subs and stuck them on an aux (via crossover). ohhh...it is soooo much nicer (for us). I think that is b/c our room is a big ice cube made of concrete.