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You've probably got a couple of room modes in and around 50hz depending on room size. You can use peq to dial those down but you're unlikely to tame it physically, especially with movie bass.
I found it took a long time to achieve good as possible and then every now and again something comes along to improve it a little bit.
If your listening room has to be dual purpose (like most living rooms!) you might be better off with a pair of high end headphones for the jazz sessions.
Having put together a pretty much ideal music room, I don't actually get to spend that much time in it! It's great when I do but sometimes I wonder why I spent years working on it.