driver caps 100 watt PA

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The first one is a miller capacitor.
It basically slows down the slew rate so you dont get oscilation.

An amplifier is similar to a servo system and a servo system requires just the right amount of gain. Too little and the output is sluggish, too much gain and you get oscilation.

If you increase the capacitors you will lose some high frequencies.

If you decrease the capacitor you could get oscilation.
 
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