XL-4165M 4 CHANNEL AMP

XL-4165M 4ch PowerSport Amplifiernn640 Watt High Efficiency Full-Range Class D Designn2-OHM Stable Stereo AmplifiernInternational Rectifier® Chip SetnUltra Low Current DrawnDouble Sided Copper Plated PCBnConformal Coated PC BoardnPWM MOSFET Power SupplynDigital Sound Optimization CircuitrynHigh Damping Control CircuitnHigh Current Voltage Ripple Rejection Circuitryn3.5mm AUX InputnRemote Soft Delay Turn On/Off CircuitnVariable Low/High Pass Electronic CrossovernVariable 12dB Bass Boost EQnVariable Gain ControlnProtection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output.