Know anything about Pentagram Loudspeakers?

I got a pair of these as freebies today from someone on Craigslist. This example is in very rough shape, but looks intriguing: about 3 1/2 feet tall, black veneer over 1" MDF, 5-sided pyramid shape with about an 8" woofer, mid and (looks like a) ribbon tweeter. Has anyone heard of these speakers before? Thay are QUITE heavy, and the internal components look very substantial. I haven't had a chance to hook them up or look them over very closely yet, but I'm very intrigued.