PowerBass PBM6004 PBM Series Full Range 4 Channel Class D Mini Amplifier

600W High Efficiency Full Range Class D Design 2-OHM Stereo Stable Amplifier Ultra Low Current Draw Conformal Coated PC Board Digital Sound Optimization Circuitry High Damping Control Circuit High Current Voltage Ripple Rejection Circuitry Selectable Crossover Network HPF, LPF, OFF Variable Low Pass Electronic Crossover Variable High Pass Electronic Crossover Variable Gain Control Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output.