LM1877 is a monolithic dual power amplifier designed to deliver 2W/channel continuous into 8 Ω loads. The LM1877 is designed to operate with a low number of external components, and still provide ...

In building the circuit, keep the wires to the power supply and outputs as short as possible. The resistos R4 and R5 set the voltage gain at the feedback which, in this case, is between 20 and 46 dB.