Here is a portion of the low power LM386 based guitar amp I am prototyping. This is an audio buffer used for the input stage of the amplifier.
Most people would use a simpler circuit built around a FET however I did not have any FET transistors within immediate reach so I did a whole bunch of fiddling around on my breadboard trying various other components I did have. This is what I found worked with the NPN audio transistors I was able to scavenge from an old tape deck.
Most of the theory I learned from muzique.com on this excellent page, although my buffer is not directly from his circuits.
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