This section simplifies the design of PA System into 5 different Design Levels. These levels range from a basic 'Plug & Play' design (Design Level 1) to a more complex digital system which emcopasses Early Emergency Evacuation System with long distance audio transmission over fibre-optic as an option (Design Level 5). The understanding of these 5 Design Levels can provide the design engineer an easier task to choose a particular design level to suit his project at hand.
The main differences of these 5 Design Levels is in the signal management of the preamplifier stage.
The System Features, Technical Features and Applications will be discussed for each level. The system levels mainly differ at the Preamplifier and Signal Management Stage.