Thanks Erik and Neko,
Seems like an A/V receiver would do the trick - then I could hook up my speakers to it. I think it all has to start from room EQ Wizard, can't initiate from Roon. I'll see if I can scrounge up a receiver.
I'm finding this project to be a tad frustrating. How do I measure my room, interpret those results, figure out which products I need and where, and then remeasure, etc.? Do I hire a a consultant? Do I do it all myself?
Whole lot easier to buy some fancy cables or box that supposed to scrub my electricity (though I believe they wouldn't have nearly as much impact as improving my room).