LOL mtx my *** they never have nor ever will have anything thats half way not junk. But as far as DD no they are not making subs for other compnays BUT they have started a NEW compnay that name is Audioque they are bulit just like DD but are cheaper and are built over seas but are tested and quality controled here in the USA hence why they are cheaper but they are some fking beast its basiclly a poor mans DD. Go have a look at them just animals. There hdc3 is a spitting image of a 3500.