The system is a Pulse-Width-Modulated system and is built with a double sided epoxy PCB circuit board. The RCA Inputs are gold plated to ensure sound quality and it has a custom terminal block for speaker connections. The Pyle Audio PLAD3300D comes with overload short protection, 0-180 degree phase control, a remote bass level control, red lighting illumination, input impedance of 10K ohms, an input sensitivity of 200mV and has soft controls for turning it on and off.