Bridge amplifier circuit/Complementary push-pull amplifier(class AB input)

[hung211203]

Hi guys i'm working on a project involving the bridge amplifier using class AB input(this is what its called at my place) and im struggling to figure out which circuit would be the correct one. On the web, i searched it but it keeps showing me the circuit but using ICs instead of transistors, and it's really difficult to solve the IC with electronics math. Also i found a limited sourse showing that i need to use 2 pairs of transistors with a pair consists of a NPN and a PNP; i think this is only the input or something im not sure because i have another document but its showing the OTL amplifier but also uses 4 transistors with output power of 60W and im trying to design a bridge typed one with 80W output power.
Do you have any useful video links or books i can have the electronics solution to understand the circuit and to design one by myself?
Thank you for reading this. Also i wil send a png file of the OTL amplifier below, i don't know if its relevant to my bridge type.

I will mostly check my messages in e-mail so if i dont reply to you soon in here then i'm sorry. Have a great day!

[Kokoriantz]

You need two of this amp to bridge. The loudspeaker then is bridged between the two outputs without the Cc capacitor. The input stage of one can be used for both making it as phase splitter with collector and unbypassed emitter resistors equal and feed the second amp with a capacitor from the emitter.

[Benta]

"Class AB" has nothing to do with the input.
The Class describes the quiescent DC current in the output stage.
Class A: full quiescent current equal to the maximum output current. Very inefficient, but will heat your apartment nicely.
Class B: minimum quiescent current, normally a few tens of mA to keep the power transistors operating linearly. Efficient, but prone to distortion.
Class AB: somewhere in between, there's no precise definition.