Monsoon--Manufacturing Question

I was pulling out the stock speakers to install my new Diamond Interiors. The speakers say Delco on the back of them. Does Monsoon just design the stereos for our cars with components from each car manufacturer? I was just curious to find out who actually makes the speakers. Are they a Monsoon product, or a Delco product?

Thanks.
Jason

take a closer look, it should say the impedence on there. Mine said Delco also, but at 4ohms.