KAC-9103D Class D Mono Channel Power Amplifier Class D AmplifierCEA-2006 CompliantLow-pass FilterBass Boost CircuitInfrasonic filterCooling FanLine outSpeaker level Input Key Features D-class Amplifier Circuit 1Ω Load Capability Built-in Low-pass & Infrasonic Filter 1800 Watts max Output Power Cooling Fan Amplifiers X302-4X-Series, Class D 4-Channel Power AmplifierX802-5X-Series, Class D 5-Channel Power AmplifierKAC-M1814Compact 4-Channel Digital Amplifier