This Hifonics ZEUS Gamma ZG Series Monoblock Class D Amp delivers a maximum of 1,800 watts for serious power for your car's subwoofer. It uses Simpatico coil design (SPC) that features PWM MOSFET power supply for minimum heat and maximum current levels through the Ultra-Fi output devices. The aluminum heatsink provides superior heat dissipation plus this mono amp has both RCA inputs and high level input to maximize installation flexibility. For serious power for your car's audio system, choose Hifonics' "Power from the Gods."