#1, it looks like it is for speaker cables. #2, it looks very much homemade, and not to a high standard. I'd be scared sh!tless using it.
Nonetheless, I *think* this is how to use it: Connect one leg of your speaker cable between the white and red terminals and the other leg between the yellow and black terminals. Use the potentiometer labeled "Amps" to dial in how much current is passed thru the cables. Too much current could easily cause a house fire, I'd do this in my backyard away from any flammable materials....
Good luck!
-RW-
Nonetheless, I *think* this is how to use it: Connect one leg of your speaker cable between the white and red terminals and the other leg between the yellow and black terminals. Use the potentiometer labeled "Amps" to dial in how much current is passed thru the cables. Too much current could easily cause a house fire, I'd do this in my backyard away from any flammable materials....
Good luck!
-RW-