I want to build my own guitar amp and I know a little about electronics (handling op-amps and little more) and I would appreciate if anybody could explain me these circuits,
http://mad-science.wonderhowto.com/how-to/build-your-own-mini-altoids-guitar-amp-for-about-5-0135412/
and I found LM386 datasheet as this: http://www.kynix.com/uploadfiles/pdf2286/LM386M-1.pdf
and this one
https://sites.google.com/site/amplificatoare/12w-amplifier-using-741-op-amp
I would like every detail that I should know in order to understand those two circuits
