http://www.digitalgrabber.com/audio/the ... oofer.html

"The 60-inch subwoofer absolutely has the capability to produce SPL levels well above 180 dB"

"The cone moves 6 inches peak to peak under full-tilt output. The actual cone diameter is 54 inches, with the 3 inch wide surround on the outside of that. The radiating surface area is 2,290 square inches. That yields a one way displacement of 6,871 cubic inches. That is equivalent to the displacement of 161 ten inch woofers that move 1.5 inches peak to peak. "

"The 60-inch sub came about in 1997. With Dr. Eugene Patronis' help (from Georgia Tech), we designed and built the giant subwoofer in about a six week period.
Unfortunately, Tim and his crew didn't realize just how much acoustical power the sub could generate, and didn't build the vehicle to contain it appropriately. Even at less than 1/2 output, the doors were blown off the tracks, and the entire vehicle ballooned in and out several inches."

