Hello! I am working on Assassins the musical in a 3/4 thrust stage. We have a sweet spot in the center of the stage where we cannot place mics. We will be putting a large 2'6" table on the center of the stage, which makes the sweet spot worse. Unfortunately, this is where most of the action will be taking place, so the actors with mics will be in the sweet spot consistently throughout the show. Any suggestions for dampening the sound so that there is less of an echo and no feedback? Thanks!