Those very well could be "white van speakers".
Many years ago I was approached by one of those guys in the white van explaining he "had surplus from a speaker job" that he did. I just laughed and said "no thanks".
A week or two later I was talking to my older brother... you can guess where this is heading, can't you. Yep, same van, same guy, same story. Except my brother bought them! $200 or $300. I delicately tried to tell him they were junk, but it sounded like he already suspected it. He asked if I'd take a look at them and try to get them working (he had bought speakers and an amp). It's been quite a long time ago but I remember the amp hookup was really weird. Proprietary connections, maybe. I got it to work... but it was bad. No bass, very limited, narrow midrange. Fragile. No volume. Crap.
Once again, I had to break the news to my brother. I think he chalked it up as a several hundred dollar lesson.
