Now that you mention that, that would not be an ideal placement for those speakers. The problem is baffle diffraction. You are basically extending the front baffle way out. The sound coming out of the speaker doesn't just radiate straight ahead, it radiates out to the sides too. The acoustic radiation from the sides will bounce off the drywall and interfere with the front'firing acoustic radiation. That is not the idea speaker to use in that circumstance. If I were you, I would look at horn-loaded speakers, they will be less affected by baffle diffraction. Look at speakers from Klipsch and Hsu Research. JBL has some good ones as well.