BULLSEYED! yup that's one of the power pigs right there. The base is a tiny bit different but that is the enclosure. I suspect these drivers were derived from recycled dual quad 850 double pumper Holley carbs. I wonder why they are so greatly power under-rated. Not bad for a freebie anyway. At 750 the guy is making a profit in my opinion. Dissappeared huh? nice, esp. for buyers with warrantys.