My previous post got cut off during a phone call. I was saying that the closet is closed with its 2 sliding doors which are sturdy enough but the edges don't line up perfectly to form a seal on each side. The closet is on the back wall, near the back left corner.

Anyhow, what I mean by the inverse frequency response comment is that right now I have just the one LV12R in the front right corner and with some pretty significant EQ I can get a ruler flat response at the MLP, which is a couple feet right of the dead center of the room. If I measure in the back left corner with this EQ, the dips and peaks I was correcting at the MLP are now reversed. For example, a wide 6-8dB dip around 42Hz at the MLP is a big modal peak at 42Hz at the back left corner or even just back center wall.