Within 100V sound systems a built-in JEL 100V speakers are designed.
The microphones are tied into a loop - LOOP (one after the other), and are powered by a special power supply unit. MD-X Delegate Microphone - All microphones are level-playing and can be switched on at the same time. When the MP-X Chair Microphone is active, all other microphones are muted.
The power supply unit is housed in the overhead room, along with a 100V amplifier and recorder.