Okay gotcha. But sounds like you need to upgrade your mids to cover 60+ hz. Or even a 3 way front stage with dedicated midbass woofers, midrange, and tweeters.
I haven't read all the comments on this thread but I have to put my 2 cents in. I agree strongly that you should never mix and match different drivers but I have done it. Years ago when I was first getting into car audio I had 2 10"jl W0v3's and 2 12 " jl W0v3s in my 1994 F150. At the time I had no idea this was a bad idea and despite it definatly being a bad idea I liked how it sounded... a lot. The 12s were down firing in the middle of the rear seat and the 10s were squished on the sides firing toward the front seat. I had the 10's crossed over from 50 to 200 hz and the 12s from 20-80. I had some nice mid bass and then when it went deep the bass migrated to the center and the effect was really cool. I did a lot of other things that I'm honestley to embarrassed to mention but all in all I really like the way the build sounded. That being said I would still never do it again. I think the reason it didnt sound horrible is because the 10s and 12s have the same driver only different cone size so the 2 different sizes didnt stand out as much as it could have. Regardless you asked if anyone had done this and had to share my story