I am not sure this is the correct forum location...anyway I have a a large area that i need to set up speakers in ...roughly 80,000 cubic feet. Is there a formula for watts/ft3?, I could either use 2 large speakers next to the the projector display on the wall or disperse it into dropped ceiling tile speakers...or a mixture of both. the audio will be used mainly for presentations and meetings. I really need help on the entire solution, mic, mixer, amp and speakers, but thought it best to start with the speakers ANY help is much appreciated!!!