Paul,

If you're only half way and that's not satisfying your thirst for BOOM BOOM, turn it up .

Also remember that music does not usually have deep lows. I don't remember how good the LFE is in Minority Report but in U-571, the depth charge scene shakes my couch with the 600 in my 4,000 cubic foot space with plenty of headroom on my receiver and sub volume to go.

Also make sure that you have the 500 set on by-pass and flat (since you have such a large room).