Good. Take a deep breath, ignore the recommendations, and crank the sub crossover down to 40-45 hz. Then play your movies again and see what happens
I assume center and surrounds are still set to "small". Some receivers will route the low notes from those channels to mains (if set to large) AND sub, other receivers seem to just route low notes to the sub. I think my HK just routes to the sub, not sure.
Depending on how your receiver works, you *might* notice some missing bass from the center and surround channels but I *think* you should be OK.
It's also possible this won't make enough difference if all the LF content is under 40 hz anyways, only one way to find out.
