And for god's sake put limiting resistors on base on final resistors, once they saturate you're in trouble.
On input I will use in your place bigger capacitors like 10 uF
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You mean the final transistors, not resistors, i.e. the 2SC52EE and 2SA1943?
If so, how can they saturate? They're emitter followers.
They can.for example, from thermal considerations or if driver goes short.that's why between emiter driver and final transistor base it's good idea to put resistor.see the second schematic that does have.
Look here and try to understand in practice it can arrive this situation"The bias resistor must connect to a voltage that is at least 0.7V higher than the supply voltage for the upper emitter-follower transistor to saturate." (eg if you have voltage loss at high power on your wires inside the amplificator, yes, the wires between the final transistor and the +Vdd, I seen this in a clone philips schematic, in practice) :
https://www.electro-tech-online.com/threads/current-limiter-using-transistor-how-to-saturate-an-emitter-follower-bjt.118323/What you are saying should never arrive, but in practice can arrive, that's the trick.
I agree final transistor will die in short-circuit load scenario and 0.22 resistor should prevent thermal derive.
For me this schematic is not the most stable choice possible, but maybe you're right ....
Anyway there are better ways to prevent signal to be overamplified, thermal and oscillation tendances.
It's too complicated to talk about all the aspects with so simple amplifier.
Pierre
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