NINE EVENINGS: THEATER AND ENGINEERING THEME Components 10 Encoders and 10 Decoders each with 5 channels 50 Photocells 40 Power relays (1500 watts) 10 FM Transmitters 10 FM Receivers 17 Proportional control channels 16 SCR circuits (2500 watts) 20 Tone control units 40 Power amplifiers (20 watts) 1 Patch panel 40 Preamplifiers 12 Speakers with tweeters 3 Drum Switches