Ah, thanks for the info. I have an idea floating around in my head about snipping the tweeter leads and using the Polks as only mid bass. Then use my a-pillars as mid range and highs only. I'm waiting on the mailman to drop off my Alpine harness so I can get my $5 9855 back in the Car and take advantage of the crossover.
I have an SL1, obviously I wish I could afford a nice 04ish VUE Redline
But... they do if done right...
Your idea gave me an idea. I wonder if you could snip the tweeters, and amp them separately (they have caps on them though).
Edit: if you used just the midbass on your coaxial, I think they are allowed just roll off naturally vs being low passed.