So I posted a question regarding amplifying signals from electret microphone. I had a problem, in which I had to design such amplifier which uses unipolar power supply. I was suggested LM386, and I got somewhere. Its very neat little amplifier, but I still need more. I tried a lot of things. My goal is: low noises, and 4-5 V at the output. So yes very large amplitude. Currently I am using 9V battery for my power source, so I don't know how much power I can get out of it. I tried a lot of things. http://pokit.org/get/b446414024786bd4ba37c3ce805f9784.jpg [Broken] I tried this with a little bjt pre-amplifier. It was better but not as good as I wanted it. I tried cascading these http://pokit.org/get/1e2ed15bad7f97f328fd12f3fcdff81b.jpg [Broken] I get very weird sound at the output. Generally I need help with these amplifiers, because I am shooting things at random, because my knowledge of amplifiers is only theoretical, and as I see its a whole different story when you try to put it together on breadboard. I got 3 LM386, and few LM741 op amps, I got over a 70 BJTs both npn and pnp, help me design this amplifier, because I am currently nowhere. I may also add that I want this so high because I will be using capacitors at the output, to integrate this signal. So I need certain voltage, that can charge capacitors, ergo 4-5[max amplitude of the signal] V.