LIGHTSPEED

Combination receiver and amplifier including built-in infrared sensors and speakers for use in classrooms; classroom audio amplification systems comprised of a receiver and amplifiers with built-in infrared sensors, and one or more infrared microphone transmitters; wireless microphones for transmitting wireless signals for conversion into sound; receiver-amplifiers for providing amplified audio from signals received from wireless microphones; infrared sensors for receiving signals from wireless microphones and speakers, all for classroom use