Thank you all for the welcome!
Actually, it was an additional surround processor to add a center and two back surround speakers to a two channel amp.
I believe the model number was Onkyo ES600PR0 or something like that!
Long time Home Theater enthusiasts. How long you ask? Long enough to remember when you had to buy a separate surround module to add surround sound. You had to add it to your two channel amp because multi channel amps were still a gleam in someone eye. My first add on was an Onkyo. Don’t remember...