ES-PRO 1000.1DHigh end MONO Block Mini class D amplifierPCB Layers:Double LayersInput Sensivity:0.2-5VMini Size easy for installingTotal Harmonic distortion:0.5%Direct Short,Thermal&Overload Circuit ProtectionLPH:35-250HzSUBSONIC:10-50HZBASS BOOST:0-12DB HIINPUT1.Mini class D2.RMS 4ohm:1chx450W3..