Wow this is nice intregated amplifier circuit , because this IC can be power output up to 60 Watt . With minimum require voltage 8 V , and maximum voltage 35 V . But this circuit is'nt so good to working on car , because output sound is very loud but not smooth. Amplifier so good working on full range , with speaker full range 100W and impedance 8 Ohm.Below it is schematic :
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The circuit above use IC AN7170 , the original output power IC is 20 W with impedance. But with use the circuit output elevated up to 60W.