You are correct about the front ports and bottom port, positioned right they are incredibly capable speakers especially for their price point (or the pre-covid discount that I got mine at).
The room is rectangular but with a bump in the wall for a closet (previous owners used it as a bedroom and I will be making it a rectangular room when I can get around to renovating). One window (covered with a blanket currrently) on one long wall, the other long wall is where the door to the room is. The window was to my left when listening on the short wall, behind the speakers when on the long wall. Flooring is vinyl pressed wood planks over top of a concrete foundation (basement room). Drywall ceiling and walls, unsure of quantity or quality of insulation (I would assume a fair amount because Alaska). Inside the room is my small leather loveseat and two 8 cube record shelves, one laying down and one upright, behind the couch and beside the couch.
I’ll give it a go with room treatment as you suggested, from what I can tell already it seems to be the right direction

