The Rel’s have a high level connector that you wire into your speaker terminals, but that also have RCA’s. I think they are called Neutrik connections.
Thanks. I think the Empire is an an idler drive. It is gold plated and a gem. This is my second system. My other is Classe/B&W 803D2 and SVS sub. I posted this picture because I had a post asking about improving clarity in hearing bass lines and was asked to take a picture of my room. The combo does sound good.