This is linear power amplifier 2000 Watt which need advance knowledge in electronics since the schematic diagram is very complex for hand made circuit. I think you have to re-design the schematic diagram using circuit diagram software designer such as diptrace, eagle, expresspcb ect. Or just order the PCB online, they will be glad to make the PCB for you.
This kind of power amplifier circuit need high power consumption, so you need to build the power supply carefully. It need dual polarity power supply (+85, 0, -85) and of course with high DC current of about 20A.
Just need to think again if you want to build this kind of power amplifier 2000 Watt. 🙂