What did the sender say was the recommended use of these three thing-umy-jiggys for getting rid of hum?
As divining rods?
At first approximation - I suppose you could use the metal bit at the yellow end to poke a few holes in your woofer so you can get at the wires and rip them off. That would get rid of quite a bit of low end hum.
Maybe with the other two you could use the black plastic end to plug up your ears (please don't do this). That would lower the remaining hum even more.