fwiw I was about 2/3 of the way back and half way up on the right side of the Palace at Auburn Hills, a venue that holds about 18,000 people.
Also at the end of the concert they played some bass tones that had to be in the 20hz - 30hz range, I felt them more than heard them, at a very loud, gut churning, level.
Roger pushed the limits of the experience...