Yes, put crudely that is what they are. Don't worry if it makes sense or not, just try them and listen. My guess is that you don't understand how your TV, computer or local nuclear power station work, but you still use them. But you could probably study some physics and come to understand them as they don't use any revolutionary theories or technology. Its low tech and it works.
They are better than the highly regarded Grand Prix gear in my system, and if you don't like them you are free to get a full refund.