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After testing the circuit, some change done on some values of resistors such a feed back resistor from 1M to 100K to reduce the gain,but I still get some noise:-(. However the thing that I'm not sure about is input impedance??? and what is purpose for decoupling voltage tap off point for 1M bias...
Does any Know how to design simple Stereo Audio Amplifier(Pre-Amp+Tone Control+Output Stage) by using LM358 op-amp and (8 ohm Speaker) ,the circuit should be working with 4.5V (e.g. 3 AA batteries)...????
I designed several circuits but I got 2 much noise
>>>>one of the circuit that I built is...
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