Thanks for running that test. That was very interesting. My friends Philharmonic 2s probably couldn't pass that test. When I crossed the Phils at 80 Hz to my sub they might have been able to pass that test though. I guess the philharmonic 3s are the way to go for headbangers.
I think the trick was that when I had it that loud I didn't play anything that would've bottomed out the woofers. Playing something bass heavy, or that had big bass peaks, like the 1812 overture, or the imperial march from star wars would've brought listening levels back down real quick. So to go real loud they really need to crossed, but they are capable of tremendous output in the right circumstances on their own.