This 10 watt transistor audio amplifier circuit using regular bipolar transistor components and has a 10 watts power output. In order to good operate, this amplifier circuit requires a 20VDC voltage up to 30 VDC.
10 watt transistor audio amplifier is a basic circuit of a low-power amplifier that can support daily audio device. Functions of 10K variable resistor connected to the transistor TR3 serves to adjust the offset voltage entering the final amplifier.
From the series above shows that the output of the amplifier using coupling capacitors to be connected to the loudspeaker load, coupling capacitors serves to inhibit the DC voltage from output which can damage the loudspeaker.