Powerbass Pbm-360.4 - 45Watt X 4 (4 Ohm), 90Watt X 4 (2 Ohm) Mini Amplifier - FEATURES: High Efficiency Class D Design Full Range and Mono Block configurations Soft Delay Remote Turn On/Off Circuit Eliminates Pops and Clicks Variable high / Low Pass Electronic Crossover Self ...Powerbass Pbm-360.4 - 45Watt X 4 (4 Ohm), 90Watt X 4 (2 Ohm) Mini Amplifier - FEATURES: High Efficiency Class D Design Full Range and Mono Block configurations Soft Delay Remote Turn On/Off Circuit Eliminates Pops and Clicks Variable high / Low Pass Electronic Crossover Self Diagnostic Protection Circuit with LED Status Indicator for Impedance Over-load, Speaker Short Circuit, Thermal Overheating, and DC Output. Conformal Coated PCB for Dust, and Water Spray Protection Variable Gain Control RMS/Max Power: 360/720 Watts .