Interesting questions. I just looked back at an old PDF file I have on the speakers and it simply states DCM10, DCM12, DCM6C for the center, and DCM6 as either bookshelves or maybe surrounds it really doesn't specify. I'm listening to my DCM10s right now and have a set of the DCM12s in my shop. Decent sounding speakers though I guess I could do better. Anyway, now that I have remembered my old file I guess I need to be looking for a DCM6C. It's sad to get old the memory is the second thing to go (LOL). Any help would be greatly appreciated. Thanks,