OK, Mr. Beaver:
Based on my 30 years experience of mixing FOH at a comfortable level for me that usually works out to be about 106 dba measured with a Radio Shack meter set to slow response time, I would guess that it was about 106 dbA JEEEZ. HE asked and I said I'm GUESSING....
Not to be picky but the A scale was never intended to be used above around 80dB-but that never stopped anybody-using something the way it was intended to be used.
I know MANY MANY people that use C weighted fast and their "guesses" are based on that "base knowledge" they have in THEIR heads and THEIR reference.
Often the difference between A slow and C fast can be 20dB-not exactly a 'little bit".
Since you did not use a weighting or state what "your" reference-how is anybody to know?
Again-maybe YOU know-but others have no idea-if they use a different reference.
I would argue that many different situations could be setup and fool even experienced sound guys with regards to SPL level. Just change the distortion a little bit and it sounds louder than it actually is.
I bet it would be easy to fool guys by at least 10dB if you were to "pull them off the street cold" and ask them what the SPL was-----------
And JUST TO get picky- 106dB mean ONLY ONE thing. That is the difference between 2 levels. Without knowing what the other level is-there is no way to know what 106dB actually refers to.
The dB is a RATIO-NOT a absolute value-like a volt or a foot or a gallon.