I currently have Infinity Kappa 5 1/4" component speakers in my car, but they don't produce the sound I'm looking for because they're so small. I would like to replace the two door speakers with Infinity Kappa 6X8's, but am I going to run into a problem with the tweeters and crossovers already being wired to other speaker set components? Or do I just replace the mid-range speaker and not worry about the tweeter/crossover from the previous kit?