I currently have tweeter in the factory HK speaker location, and a 6.5" in the factory door location, they are just too far to reinforce the midrange, and I can not cross the midbass any higher nor can I cross the tweeter any lower to fill the gap (with out the sound quality being decreased), I was thinking of adding a midrange, has anyone done this? Have pics? Thanks!

 

I've never seen anything, but the only thing that might help you is that the R56 minis are 3 way stock.