24 Volts for ACA

yes they can

you need to re-set it , to have output node (inside of output cap) slightly less than Urail/2

increasing Iq (additional resistor) is not mandatory

This is my first DIY solid state amp. I've built a bunch of tube amps. I don't understand what you mean by "you need to re-set it , to have output node (inside of output cap) slightly less than Urail/2."