where are the tweeters mounted and where are the mids mounted? if they are somewhat pretty far then u should try reversing the polarity... hook up positive to negative and negative to positive. it might fix a little harshness and put your tweets and mids in phase like it did for me. i have my mids at the bottom corner of my door and my tweeters at the top of the corner of the door. or try tuning it with an eq or some kind of processor if u can.
my RE components are also mounted in kick panels, i mitigate the harshness by slightly blocking the the tweeter with a floor mat and aiming the tweet towards under the dash.
i notice in your signature that you power them with 97wrms. i blew one of my RE mids yesterday with 75wrms while tweaking my frontstage.