This Circuit must use the IC AN7114 or you can use the IC AN7115 . Minimum voltage for this IC is 6 Volt and maximum voltage is 11 . You can supply this Circuit with 12 Volt if you use IC AN7115 because its maximum voltage 13 volt. Output Power 1 watt with Impedance 4 ohm . See the Schematic (figure 2.0) and package IC ( figure 1.0 ) : Figure 1.0 Figure 2.0