I have some 3way 6x9's in the back, some 6.5's up front, and of course some subs. Question is this, right now, only the 6x9's and subs are playing, and since the 6x9's are providing all of the mids/highs, I have them set to run high pass w/the variable crossover set to the lowest frequency, that way the mids/highs sound very crisp and I can crank the volume w/o them distorting. Once I get my 6.5's installed, should I run the 6x9's full range since they are gonna be used for rear fill and I can fade them out if necessary w/the fader on the deck, run the 6.5's full range or high pass? They are Kenwood KFC-XR600 dualmags. Or should I run the tweets for them off one channel(high pass), and run the mids low pass? Im gonna experiment with it this weekend, just looking to get some opinions and ideas. By the way, the 6x9's are Polk Audio EXII.