| Electroacustic technology
State of the art transducers have been developed for the VSA, in order to offer the highest possible intelligibility and wider frequency response, according to RCF philosophy.
A 1,4 Tesla flux density has been foreseen by using a massive neodymium magnet to get an incredible mid frequency dynamic range. The use of a neodymium magnet results in very lightweight transducers and in very compact size of the overall system. |  | Electronic technology
The powerful DSP circuit is directly connected in digital domain to the 20 50 W each Class-D technology power amplifiers, which are able to drive the 20 transducers with the optimal headroom. The amplification circuits include several protections and controls always to operate in safe mode.
Digital technology has been used also for the power supply which is regulated both
in voltage and current and it is equipped with active protections against over-voltage and over-current. The power supply module is digitally interfaced with the DSP main board to communicate voltage, current and temperature status data. It operates
in both 115/230 V AC modes and in 24 DC as a back-up power source.
During the development of the VSA 2050 high priority has been given to critical signal paths and self-monitoring components to provide easier installation, simpler maintenance and maximum safety for Voice alarm applications.
A remote switch-on facility is available to avoid to power ON and OFF the column through electric switches when the columns are not part of a voice-alarm system.
By detecting the audio presence, the column is able to switch itself ON automatically, and then OFF after a period of time in which it is not used at all.
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