I also believe that this subject can be rather misleading to some. Sound pressure operates in a logarithmic scale. The difference between 1 and 10 watts is perceived as a 3db increase or a doubling of the volume. 10 to 100, then 100 to a 1000. So 500 watts is not "that" much more than 100. You cannot just say 500 watts is 5x more than 100. What it does allow is more current output and a better handling of steep impedance curves.
