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After looking at one of the example schematics for the LM386N audio preamp - on the output in there's a cap and resistor pulled down to ground then the electrolyic cap and speaker's 8 ohm helps filters out unwanted frequency noise. I was a bit confused on why there was a ceramic cap and a resistor being pulled down to ground - is that to smooth out the ac frequency signal?
This is what I found on this page: ... amplifier/
The 0.05uF capacitor and 10 ohm resistor pair from pin 5 to ground turns out to be called a “Boucherot cell” or “Zobel Network” and is used to prevent high frequency oscillations.