Have any of you guys seen or heard of these Linear Array Transducers(LAT) made by Tymphany? See the writeup as to how they work, it's quite interesting; they use several smaller diaphragms with two opposing end motors in a very small package, just a few inches and are claimed to be comparable to dual 8", 10", or dual 12" depending on the model. Kewell!! check'em out.

Half of communication is listening. You can't listen with your mouth.