I still remember playing with some infrasonic test tones while I was dialing in my subs... still had gain 50%... started a test tone at roughly -10...
All I can say is that the structure of the house began... quivering... ferociously.
I hope, to whatever atheists might hope to
(Ice Cream Sundaes?!
), to never hear that sound again! For all I know, I could have single handedly snapped the San Andreas and dropped the western coastal zone from the Farallons to Sea Ranch into the ocean.
Wow, did I hit pause fast!!!