Not really, John; probably the best analysis available online of why tweeters can sometimes be damaged when amplifiers are driven into clipping by very high level low frequency signals is found at the St. Andrews University
site . Both the "harmonics" and "compression" hypotheses are analysed and other possible contributing factors are briefly discussed. Apparently a combination of factors may be responsible.
Doug(bug), on your original question, as was said, the power rating of a speaker is nearly meaningless for use in the home; theoretically it would be the maximum power that could be applied continuously without the speaker going up in smoke. Nothing remotely like that happens in listening using about 1 watt most of the time with possible split second peaks of 100 watts or more. Don't be overly concerned with power, voltage and current; we can get all we need(Ohm's Law hasn't been repealed)quite inexpensively these days.
