This is something few people know.

The LFE channel of virtually all movies (and multi-channel music discs) cuts off at about 80Hrz, AND if you set your crossover lower than that, LFE sound info above your crossover point will simply be rolled off/lost - it won't be sent to speakers other than the sub.

I know how stupid this is (it's REALLY stupid) but it's how virtually all receivers are designed to work, even premium, flagship ones from the likes of Denon, Yamaha and Pioneer.

What I do is use pure-direct with my Sierras for most music (skips bass-management on my system and simply sends all sound to my stereo pair) and keep things at 80hrz for movies with speakers set to small.