I'm looking to pick up a vintage Sunn 200S 2x15 cab missing one speaker. it looks like this cab: edit: it's unclear whether this cab is 4 or 8 ohms, anyone know? i'm playing on using it with my black face Sunn Coliseum 300 head. I've got a Peavey Black Widow 15" lying around. Will this speaker fit and perform well in this cab? thanks. edit: changed the thread title to reflect input on the Fender cab now that the Sunn is out of the question.