This Schematic Circuit Audio Amplifier use IC AN7105 , minimum voltage 1,5 volt and maximum voltage 9,5 volt. This is a low voltage Amplifier , with output speaker stereo 2 X 0,38 watt . Its so low power amplifier. Impedance speaker is 32 Ohm ,with Frequency 20 Hz -20 kHz. See this Circuit and package IC AN7105 below : Package IC is DIP-18 Click to view Enlarge