Lanzar VIBE411 Vibe 600 Watt 4 Channel Mosfet Amplifier 4 x 75 Watts RMS at 4 Ohms 4 x 150 Watts Max at 4 Ohms 2 x 300 Watts Max at 4 Ohms Bridged 4 x 125 Watts at 2 Ohms RMS MOSFET Automatically Switches to Maintain Rated Power Over a Wide Range of Battery Voltages