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Types Of System - Peat Wholesale

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Types of system | Technical data Types of System 100V Line Speakers For many applications, it is necessary to drive many speakers with a single amplifier, giving greater coverage to multiple rooms or over a given area. Constant voltage systems (usually 100V line) employ a transformer in the amplifier to convert the output to high impedance and a corresponding transformer in each speaker to tap off the required power from the amplifier. Theoretically, this allows a large number of speakers to be driven by one amplifier, so long as the overall power being tapped by the speakers is within the amplifier’s output capacity (usually 90% of the amplifier’s maximum rated output). Standard 100V line set-up Total tapped power: 80W 20W 100W Amplifier In addition, the transformers in each speaker may have tappings at different points along the primary coil, which effectively draw different Wattages from the amplifier. For example, a 10W speaker may also have settings for 5W or 2.5W. 20W 20W 20W The speaker output may also be varied using remote volume controls, known as attenuators, but these should be considered to be at their maximum volume output when choosing an amplifier to drive the speakers. 100V line set-up with multiple tappings Wired in parallel and tapped to 90% of the amplfifiers max. power output 100W Amplifier 15W Attenuator 0 - 20W 20W Attenuator 0 - 20W 5W 10W 20Wmax. + 15W + 20Wmax. + 5W + 20W + 10W = 90W If more speakers are required beyond 90% of the 100V amplifier’s maximum output, a slave amplifier may be employed to drive these. The slave amplifier is simply linked from the line output of the main amplifier, to which another series of speakers are then linked to, in the same way the speaker are from the main amplifier. Extended 100V line set-up Main 4 speaker system with additional 4 speaker set and slave amplifier Line input Line output MAIN 100W Amplifier SLAVE 100W Amplifier 20W 20W 20W 20W 20W 20W 20W 20W 61