Ummm...NO...
All amps are different, all manufactures are a little different too, a lot use different boards, all amps have variations in effeciency, etc...
You really need NOT to use your thesis but on brands like Legacy, Pyle, etc when they say "1000watts" and have a 30amp fuse.
But most of the time you cant judge how much power they put out by the fuse rating. My 1100watt amp has 3x30amp fuses...so does the Profile CL1200 which only puts out 900 (off by 300watts)...of course you can guesstimate, but fuse ratings is NOT what you look at