Hey...., exactly WHAT Kappas are you running?

If they are two-way and have a small tweeter and crossover - the door tweeters are kinda overkill. I'd just disconnect the door tweeters and see how it sounds.
I ask cause SOME Kappa models have a nice tweeter in them already.

I ask this becuase I found a set I like that have tiny tweeters and are 2 ohm -you don't want to put ANYTHING in there with those, as your impedance would be well below 2 ohms and the amp can't possibly like THAT. I'd bet the ones I found would out perform what is in my car now, which is factory.