Check the amplifier circuit for errors?

Question

Electronics

the circuit is working, I want to bring it to the ideal, check the amplifier circuit for minor errors

Answer 1

At first glance, everything is OK, it should work. On the second, if you estimate on your fingers - the amplification of each stage is about 10 ... 12 times, the transistor current is 30 mA or a little more, the maximum allowable ones seem to be not exceeded (as far as my memory serves me).
In general, it is suitable for 30 kHz, and even in excess - it will pull even 30 MHz, if it doesn’t “whistle” (and it definitely won’t whistle in the simulator). And as for " bringing it to the ideal " - it is first necessary to put forward the criterion of the ideal.