CA-350II power amplifier is a classic analog power amplifier, adopts class AB circuit design, mature and stable, suitable for various harsh environments, and can achieve trouble-free operation. There are a variety of configurations, power levels and functions to choose from, which can almost meet the needs of all commercial applications which includes a lot of comprehensive protection circuit of CA power amplifier. In view of the high temperature environment that is unfavorable to the machine when the power amplifier is working, the built-in audio limiter, start-up delayer and peak current limiter of the CA series power amplifier provide comprehensive protection.