If you don't consider the RC time constant then low frequencies won't get boostrapping and will be very distorted.DigiTan said:Did the value of that bootstrapping capacitor have to calculated or is there a rules-of-thumb? It seems like you'd have to take an RC time constant into consideration.
The two 2.2k resistors are effectively in parallel so 22uF into 1.1k is a frequency of 6.6Hz. All audio freqiencies will have bootstrapping.