Tour Grade amplifiers have a microprocessor controlled operation management system that provides useful features like compound thermal management (preventing amps from switching off in excessive thermal environment) and automatic mains voltage detection. Tour Grade amplifiers use grounded bridge, two-step, class-H topology to ensure the highest acoustic performance and reliability. The TG Series also offers power and transient response to drive subwoofers, along with low distortion for critical HF signals. The high-capacity switchmode power supply provides the headroom needed to ensure high dynamic outputs and reliable operation on extreme low loads.