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Acoustic Guitar Amp

I was wondering how to make a simple amp for my acoustic guitar with a LM358. I know it is common to use the LM386 but i don't have one and its costly just to order one. Any Ideas?

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Is the power gained from an LM358 going to be loud enough to amplify over the already loud volume of your acoustic? 

- P 

not very sure about that. I think thats probably what I'm asking you guys.
The LM386 is perhaps the simplest op amp to build.
Can i directly replace it with the LM358?
Obiously i have googled it before. But I was looking for a simpler circuit or hack something to get  an amp
Buy a cheap set of computer speakers, they have the same or better amp.