*2Pcs TDA7293 100W Digital Audio Amplifier Board AC 12V-50V Mono Single Channel*The official standard circuit, stably and reliably*You should add heatsink to the board so that It can work stably*You must use the Transformer with three wireFeaturesChipTDA7293Power supplyAC 12V-32VChannel TypeSingle ChannelOutput power100WLoad Type4-8 Ohm SpeakerInput impedance100K
OhmFrequency Range: 20hz-20KHzSize60*45*35mm