"Pegged it, took out both midrange drivers and damaged a tweeter diafram in my Heresy."
As an old audio dealer, our rule of thumb was to replace blown drivers "under warranty", no questions asked for the first occurance. Accompanied by a bit of "education" on what makes drivers fail. When we had customers with a history of blowing stuff up, we’d move them to Klipsch because they needed "a speaker that could hurt them before they could hurt it." I can count on one hand the number of "warranty" replacements we made with Klipsch.
Related to the graduation party, nothing says "Party’s over, time to go home" better than the abrupt exit of over 50% of the musical bandwidth as a result of blown drivers. Of course with some modern music, the participants may not have noticed the diference. Unchained Melody, however, would have been a different story.