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Operation of the sound system is a serious ministry and the person who works with the sound must take it seriously. The sound operator should be a dependable person who has a servant’s heart, willing to cooperate and take directions, not touchy or easily offended. He should be a person with a good ear, attention [...]

Radio frequency interference (RFI) can bleed into sound systems from nearby radio stations, or C.B. radio transmitters. Electro-magnetic frequency (EMF) interference can also come from other electrical devices such as electrical transformers, fluorescent lights, computers, electric motors, or switches.
High impedance microphones and equipment are much more sensitive to these types of interference. In some cases, [...]