I didn't get a chance to play with the bad EP800. I thought the buzzing was just a ground loop but his audio guy fiddled with the settings and tried other outlets and it still buzzed. The phenomenon he described sounded like one of the drivers was disconnected and was passively radiating, or one of them was wired opposite. When I looked at it it was beautiful and I wanted one, but it would never fit in my room. And my family room is not acoustically sealed like his theater is.