Anthem room correction (ARC) is pretty highly regarded, There are some pretty stellar deals to be found on ebay for used Anthem receivers that would be inexpensive for a person to power a stereo system and tame room modes on the cheap. Obviously there are other brands as well with other room correction programs.
https://www.ebay.com/itm/28436059093...QAAOSwSjlg2Q1b
Jay