I'm wondering if this is normal, or if I'm doing something wrong, and hoping to rectify this. I have my subwoofer set at (what seems to be) a proper level. Running a test tone through it from my amp and using a SPL meter gives a nice rumble. When I watch films on it, I feel good thumps from it at appropriate moments such as Star Wars films, Jurassic Park III, etc. But with certain films, the subwoofer doesn't give the thump at times I would expect it to. For example, I don't feel vibrations when the T-Rex stamps its foot down in the original Jurasic Park and in Godzilla, the scenes that are well-known subwoofer moments. If I turn the subwoofer up so I get something from those particular moments, it'll be too high for when I watch other films. Can anyone identify what I might be doing wrong? Thanks. Setup: Denon 2802 amp, Mission M72 speaker package, B&W powerbass subwoofer.