If you had vintage speakers, they would have brilliance (tweeters) and presence (mid driver) level controls, adjustments would perk the frequencies to your liking. They were made because they might end up in a live room, or a dead room, and your particular preferences.
Alas, most modern speakers do not provide level controls
I would start, perhaps finish with a multi-band equalizer
here's an inexpensive rockville 21 band from Amazon (try it, anything can be returned) (they make a 32 band, but enough is enough)
You will learn about your room, specifically what's missing, what boost/cut makes the biggest difference at your listening positions.
For home theater, if the equalizer makes the system sound darn good, I would be done.