Take a listen to private Ryan or the Truman show the old 5.1 is still impressive AF.Sound mixes these days seems all over the place. Watching movies from the 90's and old I find are much better for sound quality.
This works the charm but you already have a sound system
What Is Clear Voice? - Yamaha Music - Blog
Learn about Clear Voice, a feature offered by many Yamaha sound bars that brings dialogue and narration to the forefront, making voices easier to hear.hub.yamaha.com
Might not be a bad idea to get your hearing checked.
As mentioned it's enhanced dynamic range for theaters in soundtrack that causes the need to vary the volume to hear dialogue and then turning down in battle scenes etc.
So you need a way to actual reduce the dynamic range to keep dialogue audible and loud events reduced. Not sure how the Yamaha trick works but it does.
BT headphones really gets rid of the problem.
Not so inclusive for family.
You are heading in the wrong direction. THX is designed to have wide dynamic rangeTHX Loudness Plus option looks promising - will have to see if it's already enabled
THX® SPATIAL AUDIO ENHANCES STEREO AND SURROUND SOUND TO DELIVER NEXT-GENERATION AUDIO THAT INTENSIFIES 3D SOUNDSCAPES IN ALL FORMS OF ENTERTAINMENT.
You are heading in the wrong direction. THX is designed to have wide dynamic range
..the opposite of what you want which is intelligible dialogue without overbearing loudness. You want less intensity.
If you haven't had a hearing test in a while you might be surprised - they are free.
That said, it's a question of reducing high dynamic media bits to a lower range that is suitable for home listening.