Hello Derrickdj1,
Thanks for your take on it. Yeah I understand your point of view however 75Hz is not low enough.
In Movie theaters you hear that chesty voice and that to me sounds a heck of a lot more natural.
Besides Dialog a lot of movies do put other effects in there and because of the high shelving you miss out the depth of the effects.
After all 7.1 Receivers all are giving you the full spectrum so why have any shelving on the Center Channel?