I picked a volume level on a bluray disc player with analog outs and recorded the waveform of the Voltage on the subwoofer output while playing various movie scenes. This voltage includes the re-directed bass from all 7 channels. The vertical scale on waveform grid is 1 Volt per division for all of the following movie scenes. How many Volts this particular player outputs for the content isn't important, it just shows the difference in output for different movie mixes. The readout next to the waveform below tells what the peak positive voltage level is and then the peak negative voltage. When you add the 2 together, you get the peak to peak value (Vpp). I tried to pick the hottest scenes of the following movies.
There are some lower level movies included here to give a frame of reference but mostly there are sub crushing monster soundtracks. Seeing the difference in the voltage levels of the low level films vs. the heavy weights, it's no wonder why when you pop in certain soundtracks like HTTYD you have to be very careful where your sub trim and MVL is set to so that you don't overdrive your amps and drivers.
Let's start with a lower level film mix...
Avatar. DTS-HD MA 5.1
-This is the scene where the tree falls -12.04dBV from WCS
Edge of Tomorrow. DTS-HD MA 7.1
-The square wave intro -7.04dBV from a WCS
Earth to Echo. DTS-HD MA 5.1
-The ship at the end of the film -2.03dBV from a WCS
Godzilla. DTS-HD MA 7.1
-1 hour, 40 minutes in where Gozirra fights Mothra (or whatever that thing is supposed to be) -5.78dBV from a WCS
Guardians of the Galaxy. DTS-HD MA 7.1
-Intro of movie where Chris Pratt says he is Starlord -6.52dBV from a WCS