Autotek AXL4050.4 AXL Car Amplifier New rugged heat sink design Military grade PCB design SEPP A/B analog class Mono block 4/2 & 4/2/1 ohm stable 4 X 500 @ 4 Ohms, 2 X 1000 @ 2 Ohms, 2 X 2000 WATTS @ 4 Ohms Bridged