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