KAC-PS811D High Performance Monaural Power Amplifier Class D AmplifierLow-pass FilterBass Boost CircuitInfrasonic filterCooling FanLine outSpeaker level InputDie-Cast Aluminium Heat Sink Key Features High Performance Monaural Power Amplifier for Subwoofer D-class Amplifier Circuit 1600W Max Output Power 1Ω Load Capability Build-in Low-pass & Infrasonic Filter