4 x 100 watts TRUE RMS certified at full range output Digital Class D Brazilian Technology 4 Channel car audio amplifier stable at 2 Ohm gives you the benefit of wiring multiple speakers and dividing the power per channel. Engineered to be the most efficient full range amplifier so that you can get the most out of your vehicle’s electrical system! A small footprint and compact chassis make this amplifier easy to install anywhere in the vehicle: 4″ Wide x 5.40″ Length x 2″ Height 2 Channel Bridged – double the power output to your speakers by bridging two channels. Minimum impedance of 4 Ohms per bridged channel at output power of 2 x 200 Watts RMS.