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Some problems about the audio amplifier circuit

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Hello guys! I am trying to make an LM301 audio amplifier circuit.Just started with some audio amp and trying to wrap my head around it all. I was just curious if you could expand on a couple of things quickly. They are probably really basic so feel free direct me anywhere else. First how do you know what value capacitors you should be using? Why does the Capacitor filter the hig frequency rather then an actual High pass filter?
 

krs


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Strange question for a Mac forum, but since OPs Friday's post is still up, I would suggest OP reads through this:
:
 

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