Jhinkel,
Thanks so much for the info - you have verified that these are the ones my brother had, and like you I have never seen a pair since, outside of yours. I don't know of any other cerwin's that did not have removable grills. I can tell you that he purchased his in 1976, which puts them in the second series of residential speakers that CV made. They are close to first generation R12's, and must have only been built 76-78. I don't think his had cast aluminum frame woofers, but I cant swear to it. Only the very earliest ones didn't, CV outsourced their drivers at that time - to some reputable companies from my research. Your setup sounds really great, I know that those speakers turn even the smallest of amplifiers into very big ones! I've searched for another pair but not counting on ever finding them, occasionally there will be some of the larger - 316's, 317's, 417's. I may have to settle for something newer, holding out hope for now. Enjoy, enjoy and thanks again for the info.