Dual Electronics XPA2100 High Performance Series MOSFET Class AB Two Channel Car Amplifier with 300 Watt Peak Power CLASS AB TWO CHANNEL AMPLIFIER  your Dual Electronics XPA2100 High Performance Series car amplifier has specific linear circuitry that improves sound quality and power output while reducing distortion and refining efficiency for sound superiority HIGH CURRENT & EFFICIENT MOSFET DESIGN  enables you to have 300 Watts of Peak Power, 150 Watts RMS via 1 Channel at 4 Ohms Bridged, 75 Watts RMS via 2 Channels at 2 Ohms and 50 Watts RMS via 2 Channels at 4 Ohms for unmatched sound quality PASS THRU RCA CONNECTION  for expandability we added a pass through RCA output to easily connect an audio signal to an additional amplifier HIGH & LOW LEVEL OUTPUTS  we added this feature to your car amplifier for versatility in order for high-level inputs to accept speaker output signals and low-level inputs to accept preamp output signals SHORT CIRCUIT PROTECTION  given the vast amounts of power your car stereo amplifier has we made sure that there was a thermal and DC offset safety protection included 1 YEAR WARRANTY  guaranteed high quality and reliability with hassle-free parts and labor warranty with excellent customer service DIMENSIONS  8.90 W x 9.17 D x 2.17 H 300 Watts Hi/Lo Inputs Variable Low Pass/High Pass Crossovers Variable Bass Boost Extruded aluminum heatsink