There was some interesting (but misplaced) discussion of amplifier power requirements in a recently closed thread. One point of disagreement had to do with the validity of the Pano method for estimating how much amplifier power you need. You can find the description of this here:
http://archimago.blogspot.com/2017/09/musings-how-much-amplifier-power-do-you.html
https://www.diyaudio.com/forums/multi-way/204857-test-voltage-power-speakers.html
If you use very dynamic music with a peak near 0dB, then it seems to me that this is pretty much as good as using a scope to get an idea. Of course, it is only going to give a ballpark idea either way when you estimate using dynamic music that you would listen to. It is not worst case and I think those of us who think this method is valid would still want a good amount of extra power for peace of mind.
I hope those who have criticized this methodology will take the time to carefully read through the @Archimago description before discussing. If there are problems with this it would be good to understand what these are. On the other hand, if this proves to be OK, then it will be useful to be able to point people to the links above. The question of how much amplifier we need seems to come up over and over again on this site.
http://archimago.blogspot.com/2017/09/musings-how-much-amplifier-power-do-you.html
https://www.diyaudio.com/forums/multi-way/204857-test-voltage-power-speakers.html
If you use very dynamic music with a peak near 0dB, then it seems to me that this is pretty much as good as using a scope to get an idea. Of course, it is only going to give a ballpark idea either way when you estimate using dynamic music that you would listen to. It is not worst case and I think those of us who think this method is valid would still want a good amount of extra power for peace of mind.
I hope those who have criticized this methodology will take the time to carefully read through the @Archimago description before discussing. If there are problems with this it would be good to understand what these are. On the other hand, if this proves to be OK, then it will be useful to be able to point people to the links above. The question of how much amplifier we need seems to come up over and over again on this site.