They buzz pretty loudly with bass so I'm assuming they're blown. Looks like the best bet is to pull the door panel and get the number off them. I don't want to go down the aftermarket path. Even matching resistance doesn't mean they'd be any better or sound the same as the OEM ones. Maybe I'll get lucky and find that they're just rattling on something loose in there.Do you have to actually replace them? They're pretty tough.