Chop123

Gang-I want to add a third party box subwoofer to my 2002 SC430. I was thinking I could leave the factory Sub in place (repaired the cones already) and use a Line Output Converter to RCAs for an all in one Sub/Amp like the JBL BassPro units. As I read through the forum, it seems like the factory Sub signal is 16 ohm? Can I use a standard Line Output Converter on the factory wiring attached to the factory sub?

Thanks-