What are the advantages of using a 70 volt (70V) system?
Commercial sound systems allow for long speaker runs, and they can power a large number of speakers in each system. It is also easier to control speaker power draw in a 70V system. The output of a paging amplifier is designed to limit the maximum output voltage supplied to the speakers. This maximum output remains the same regardless of the amplifiers power capacity. Because the output voltage is limited, speaker manufacturers can design products to consume a specific amount of power from the amplifier. This is beneficial in two ways. First, the speakers will not consume more power than they are designed for, so they cannot blow out from using an amplifier that’s too powerful. Second, since each speaker’s power consumption is known, the correct amplifier power for the paging system is simply the total power drawn by all the speakers.
