I would like to run 12 gauge wire to my mids but on the - side it is a thin male post do they make female spade terminals for that size male for 12 gauge?
yeah, but they're hard to find. Check an auto parts store. they may have some/may be able to get some.
Just curious...any particular reason you're running 12 to your mids? I never used more then 14 I don't think.
Learn to solder. Good skill to have, and a much better connection.