Don't you hate it when some people in the audience cannot hear while others almost go deaf because the speakers are too loud? Not sure what type of system would best solve this problem?
Amplivox's Wireless Sound for Portable Sound Systems Instructions and Tips gives you all of the information you need to create the perfect audio environment for presentations.
It takes you through the different types of microphones, speakers, and amplifiers and then gives instructions on how to set up the system to maximize gain and reduce interference and noise. It also give suggestions of how to ensure that everyone in the audience hears your presentation at a comfortable level.
Click here to read the entire White Paper: Wireless Sound for Portable Sound Systems.