Tonight, I used "The Incredibles" for some more testing. The graph is of the fight scene between Mr. Incredible and the 4 legged robot.

A note - This NOT a frequency response curve, it shows the max SPL's at differing frequencies which are being delivered by the movie. More analysis below ...

The Fight Scene graph :



Note the most potent bass here is from about 25 to 32 Hz. Again, this is what the movie delivers in the soundtrack.

I will hopefully find a movie with some solid 16 Hz bass - which is rare. Suggestions accepted ...