This is the circuit design of Mosfet power amplifier 5200W RMS, the schematic is for single channel. The circuit uses 16x IRFP250 to gain 5200W RMS power output at 2 ohms load.
To feed this circuit , you will need 150 volts dual polarity (symmetrical) power supply of course with very high DC current.
If you want to build this amplifier circuit, you should be careful and try to find some reference about this kind of circuit since it uses high DC voltage and high DC curent and of course expensive loudspeaker. I haven’t build this circuit yet, try this circuit with your own risk.