KAC-8404 High Performance 4/3/2 channel Power Amplifier CEA-2006 CompliantLow-pass FilterHigh-pass FliterBass Boost CircuitCooling FanLine outSpeaker level InputDie-Cast Aluminium Heat Sink Key Features Signal sensing turn-on 600 Watts max Output Power 2Ω Load Capability Cooling Fan (2x) Built-in Low-pass filter Built-in High-pass filter Bass Boost 40Hz (0~+18dB) Blue illumination Speaker level input Amplifiers X302-4X-Series, Class D 4-Channel Power AmplifierX802-5X-Series, Class D 5-Channel Power AmplifierKAC-M1814Compact 4-Channel Digital Amplifier