I have two 12 inch 8ohm speaker and I want a circuit diagram of amp having 2 mic input (not electrolet) and also one aux in to give input from devices like mobile etc it should contain preset of spkr vol ,mic vol ,and bass and treble for sound control. I tried a lot but i couldn't get a full circuit diagram of it. They were separate power amp, preamp and other circuit. So, any one can guide me a right way . If possible include pcb. The main thing is i want to play those big speakers clean with mic in and aux in. Hope you understand.