Here they are, working beautifully.
This pair of Minimus-7 speakers came from Radio Shack, back in the 20th Century when they not only were still in business but actually sold stuff you might want to buy. The 7's were very popular as extension speakers, which is how this pair was used in its previous life. They pack a pretty big sound and now seem to have a bit of a cult following on teh internets. My original plan was to convert them to a set of Bluetooth speakers using the TDA7492p board (also quite popular), but then I found the cute acrylic case that shows off the electronics.
These will be going up on a shelf I'm planning to put over my desk.