Power Acoustik R4 1000 Reaper Series Class AB 4-Channel Amp 1,000 Watts Max, 85W RMS x 4 at 4&Omega; Class AB 4-channel amp 2 stereo & 4 bridged full-range operation Military-grade PCB with PWM MOSFET power supply Direct short, thermal & overload circuits 200mV-6V low-level RCA inputs