Yes it is, it's purpose is to improve stability feeding capacitive loads. A zobel network is needed as well.
However, do you consider it's a viable project? - you can buy far higher power amps for much less money than the cost of the parts.
You also have a pretty high chance of the amp self-destructing, maybe more than once, during development.[/Q
Sometimes hand made amplifiers have a better performance and it is easier to troubleshoot when it fail to function than the company made
what is the advisable inductance of coi in the output for a 500 watt amp.?
in my circuit diagram it uses 5.7uH.