Power Acoustik VA4-1800D 1800 W Max 4-CH 4-Ohms Full Range Car Stereo AmplifierBRAND NEWPOWER ACOUSTIK VA4 1800DVertigo Series 1800 Watts Max Class A B 4 Channel Full Range Car Stereo AmplifierKey Features: Max Power: 1,800w RMS Power 4 Bridged, 14. 4V: 2 x 320 RMS Power 2, 14. 4V: 4 x 160 RMS Power 4, 14. 4V: 4 x 100 2 ohm Stereo & 4 ohm Bridged Class A B Full Range MOSFET Power Supply w Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect