My brother-in-law has a pair of 30-year old Infinity Reference Studio Monitor speakers that I was helping him connect to my old Pioneer Elite A/V receiver over the holidays. I would like some recommendations on possibilities for a center speaker that will come close to matching these tonally. They appear to have a ribbon tweeter. For now, I have the receiver setup with a "phantom" center, but their seating positions are off-axis, so a real center speaker would work better.
I found a photo of the speakers here.
I found a photo of the speakers here.




