You're right, there is nothing about these speakers on google. I could find a TCN Corp. in Framingham, MA, but only an address. There was no info about them being in the audio business.
The info on the label on the back of the speakers looks reasonable. There are no absurd or unbelievable claims. But… it lists two patent numbers. One patent number (3,582,553) is owned by Bose Corp. for the 901 speakers
Patent US3582553 - LOUDSPEAKER SYSTEM - Google Patents. The speakers you have seem to have nothing in common with Bose 901s. The other patent number does not have anything to do with speakers.
What I find unusual is that the friend who gave them to you for free doesn't even remember buying them or what they are like. I wonder why these speakers are so forgettable. Buy you can't beat the price. Go ahead try them.
If BSA's hook up directions weren't clear, use two short wires to connect those pairs of terminals. One wire connects the two black terminals together, and the other connects the two red terminals together. Then connect your receiver to one red and one black terminal in the usual way.