My brother, before he went off to study the Viola at Indiana State University studied with Milton Preves, a violist who was the first chair in the CSO (Chicago Symphony) Orchestra). He taught students at his home here on the Northshore. I was there a few times and actually heard his setup; Klipschorns and McIntosh amplifiers. Never heard them before. As a thirteen, fourteen-year-old, I was blown away and I think it had a center channel but that was a long time ago. It was a large room.
Charlie Haden owned Naim Audio gear.