WK: I think they are all playing a numbers game to sell product. Even Yorkville wants to be competitive. I don't for one minute believe 1440 watts program. Divide it by half and it's more reasonable. Even at 720 watts per speaker you can certainly damage hearing
As for heat generated, at the first gig at moderate levels, the amp/mixer module was just barely warm to touch after about 2 hours.
These cabs have two modes, Concert and Club. Club adds ridiculous bass at all levels. Not something I want to subject a 12 inch woofer to for very long at 45 Hz low end. Concert mode probably only goes down to 55 Hz, much easier on the 12. Still plenty of bass for most venues. Sorry for rattling on on specs, you've probably already researched these cabs
I'm sure if they were pushed into limiting, they would get very warm. But I never ever in all my years running powered speakers have seen the limit lights come on on the back of the speakers. If I wanted to play that loud, I would be using a good sub and engaging the sub mode on the speakers. I do use a sub for school dances. IT'S ALL ABOUT THE BASS!! Heh, Heh, Heh!
PS: I must be getting old... How did we get to speakers from Sticking buttons