This is very simple power amplifier circuit using popular IC's Power amplifier TDA2030. Requires only a few components, power amplifier IC supporting components such as resistors and capacitors.
Power Amplifier using IC TDA2030 circuit diagram
At the circuit above, to make Power Amplifier is very easy, circuit track is visible, it is easy to connect soldering, withhout PCB. Connectring using cable, To see more information about TDA2030 Power Amplifier see here :
TDA2030 Power Amplifier