20kHz sine wave signal amplification
A 741 op-amp has a very low slew rate, 0.5V/uS if I recall correctly.

Something like a TLO71/2/4 at 13V/uS would be far better if you want to stick with old and low cost common op-amps, or an OP275 at 22V/uS is aimed at the pro-audio market.

In fact, almost any op-amp that isn't billed as 'micropower' will out slew a 741.