Bosch Praesideo Digital Public Address & Voice Alarm - Amplifiers

There are four types of power amplifier units in the Praesideo product range. These differ in the number of amplifier channels per frame: one, two, four, or eight. The overall power rating is 500 Watts for all of the amplifiers.

The power amplifiers can be set to 100V, 70V and 50V output tappings. They have short-to-ground and short-circuit detection functions, and can generate their own pilot tone for supervision purposes.