The difference: 3db increase in loudness for each time you double the power.
For example, if you are driving them with 100w and go to a 400w amp, that doubles the original power twice (100x2=200x2=400) and they will play 6db louder with 400w than with 100w.
Opinion: More power be's GOOD!
For example, if you are driving them with 100w and go to a 400w amp, that doubles the original power twice (100x2=200x2=400) and they will play 6db louder with 400w than with 100w.
Opinion: More power be's GOOD!