Sound Reinforcement

Paper Summary:

This paper discusses how the term sound reinforcement refers to the strategic use of microphones and loudspeakers to project the sound of a band, theatre production or conference speaker across to an audience. It examines how it is necessary for a sound engineer, working in any area of sound reinforcement - from the front of house engineer in a large concert hall, to the stage manager at a theatre , to have the confidence and knowledge required to problem solve quickly in the event of equipment failure, and keep the programme on track.

From the Paper:

"The term impedance matching is used when concerning the interconnection of loudspeaker drivers and power amplifiers, to achieve maximum power transfer. At this stage in the signal chain, it is very important to appreciate that the load impedance of the speaker (the whole cabinet, not just the driver itself) must match closely the source impedance (the rated output impedance of the power amp). If the source impedance is significantly higher than that of the speaker, the amplifier could overheat, or its automatic protection circuitry could cause it to cut out. Neither of these conclusions would be much good during a live performance."

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