The Kappas all lost their surrounds but was able to replace them 15 years ago - they came back better than new, and still sound amazing.
Preamp only has a DB25 connector for 5.1 surround; hooks up to RCA outputs on an archaic, yet high end ASUS Xonar sound card. And all of my media goes through my 10 year old Windows 10 HTPC (recently refurbished with a new case, cooling and storage) and controlled by a Logitech wireless keyboard.
I love watching movies, YouTube etc on my 6 year old 65" Samsung that's simply a dumb display like that. Couldn't be easier to use; very performant. Beats a "tv app only" experience out of the waters.