Woofer speaker amplifier circuit

In the circuit use a IC AN7171 . Minimum requirment  voltage is 12 volt and maximum voltage is 15  volt . Power output 2 X 30 W with impedance 4 Ohm . Speaker match woofer speaker , and operate it on the small room. This circuit matches variety of input device such us mixer , equalizer , tone control , processor , galaxy , bass boost , giga bass , and etc.

This circuit schematic below :

AN7171 amplifier schematic

Output speaker is stereo , output couple with ground and add commponent resistor 2,2 Ohm and capacitor 100 nF.