Blowers and speakers require the most amount of amps. make sure you test the blowers and speakers early on. If you do blow a breaker you may need to split up the load by placing each blower on a different breaker. If you have more than 2 speakers than you may also need to put the speakers on a different breaker. If you are at a house, try running one blower to an outside outlet and the speakers or second blower to an inside outlet.

The longer your extension cords the less voltage you will have at the end. If you have more than 250 feet of extension cords, you may have to put the screen blowers on one cord, and the electronics on a different cord. The some projectors will not work with less than 100 volts, by splitting the load you can help mitigate the total voltage drop.