It's almost embarrassing to say, but Realistic Allied 40-1230.
Because of that I was really skeptical and had figured I was buying these for the cabinets and good looking baffle design that I could put something more worthy in, but when I hooked them up to listen I was absolutely blown away. As were a couple audiophile buddies of mine I immediately had come over for a listen. I didn't tell one of them what they were until after he was telling me they sounded as good as some of the finest he's ever heard including some $50,000 systems. When I told him he went silent and pretty much looked like
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I have looked through most of the radioshack catalogs on-line and haven't been able to find this driver. Some that appear similar.