75W BJT amplifier "Mona"

HI, i present you "Mona", it uses bd679/680 as output transistors.

They are 40W darlingtons -> Q1+Q4+R1+R3 simulate bd679.
same for the downer side.

I forgot a cap in the fb, for DC protection.

Greetings, any oppinions would be welcome. ;)
 

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little update:

output transistors bdx53c/54c are suitable as bd679/680.

mj11032/33 are for simulation only (their beta is changed in the simulator).

distortion is less without input LPF :confused:

This time adjustable bias :headshot:
from 4 to 114mA
 

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