Good morning Mr. Feliber,
I have seen that design earlier, as I have told theorticaly Amps can be made of thousands of wattage and can be made practicaly also.but as I earlier said, to run this short amps one will need gigantic power supplies,the circuit i put is basicaly 2500 watts into 4 ohm,load can be taken down to 0.25 ohms and simulations show same characterstics , but to tolerate that short of current output minimum 100 pairs of output transistors will be needed, material I have is only 50 pairs of transistors and traffo of 14400 watts primary,with this i will be able to achieve around 8000 -to- 9000 watts both channel.that is more than sufficient for me.