John Garcia
Senior HTF Member
-20 usually refers to the level on the receiver not the sub, but it doesn't really tell you the whole story because it doesn't necessarily tell you relative to what calibrated level. Where ref cal is on one receiver depends on the room and equipment used in a given setup, so it varies from system to system.
The bass on the DTS track is quite heavy duty. Fun stuff with a good sub, which is why I have it, but not exactly a great movie.