The basic amplifiers are cost effective alternatives to the regular Praesideo power amplifiers, for situations where no built-in digital signal processing functions, such as equalizers, delay and AVC are required. They do not have a Praesideo network connection. Instead, these amplifiers are connected to the Praesideo network via the PRS-16MCI Multi Channel Interface, which provides the basic amplifier with audio signals and has full control. There are four versions, the PRS‑1B500 (1 x 500 W), PRS‑2B250 (2 x 250 W), PRS‑4B125 (4 x 125 W) and the PRS‑8B060 (8 x 60 W).The basic amplifiers are completely supervised and fault events are reported via the multi channel interface to the Praesideo network controller.The basic amplifiers provide connections for separate group A and group B loudspeakers for each zone, and support class‑A loudspeaker loop wiring. The units should be mounted in a 19"-rack with the included mounting brackets.