# How can I calculate low and high frequency in my circuit?

How can I calculate low and high frequency in my circuit? I have used an 8-ohm speaker.

With an power suply voltage, the amplifier can only produce an output voltage with an amplitude of much less than 3V. At a frequency of 20kHz, the slew rate will only be $$\0.37 \frac{V}{\mu s}\$$. However the sine power will be less than 0.5W.