115 Wrms Symmetrical Audio power amplifier

Now, how to choose the real parts to build it? :)

I have included a switch at the input that interrupts the signal, opening it allows to see with some clarity the DC conditions present in the circuit. With this data and making the relevant calculations, you can know the power dissipated by the resistors for example. The output transistors must be selected knowing the maximum current that will flow through them under maximum load conditions, this data together with VCEsat will allow to calculate the power dissipated by these devices, it is also important to check the corresponding hfe value for the currents present in the devices. Doing this type of simulations only helps us to know the feasibility of a circuit working, particularly this circuit must be analyzed with more complex simulators in which the Spice models of the selected devices can be included. To conclude this comment, we must remember that when designing the printed circuit for this amplifier, some parasitic capacitances associated with it and the wiring used will appear, which can cause the circuit to oscillate and also influence the high frequency response of the amplifier. In addition, the power supply to feed this amplifier will have to be designed, which must be done very carefully.