Crown PSA-2 is a high-power direct-coupled amplifier that automatically analyzes its own dynamic environment to control the output level relative to the output transistors’ Safe Operating Area. It features 16 rugged 150-watt transistors, each tested on the Crown SOA III Transistor Analyzer, ensuring maximum output with maximum safety. The PSA-2's independent high-voltage power supplies for each channel prevent a single channel output stage problem from affecting the performance of the other.