Pro series amplifiers are high performance and high efficiency’s top quality amplifiers. For the purposes of getting high quality sound, it adopts TOSHIBA big power valve covered with metal, and that make the sound quality can reach higher levels. 1. Power ON/OFF transient, prevent the surge assault 2. Thermal cut off protection, the amplifier will cut off the link with speakers when the temperature is more than 85 C 3. Short circuit current limited protection. 4. The muting circuit prevents switching noise by turning the amplifier on of off 5. DC protection ad speaker output, the amplifier will cut off the link with speakers when the amplifier is unusual. 6. Limited, providing 30dB of compression without distortion, the amplifier will not clip.