just looking for a little info here... i've acquired a set for free. yay me only downside is they didn't come with the crossovers, but none of the speakers themselves have ever even seen power. i have 2 amps, a boston GT20 on a single boston G1 10" sub, and an oooooooolllllld ppi a404 amp. it might be from circa 1992, but still sounds like a million bucks (and it was also free) without the proper crossovers, i was trying them without the 4" midrange, crossing them over actively. problem is, the mids sound like absolute A$$ in the higher frequency range. i had assumed that the 6 1/2's were the same as in the pro 6.5 2 way comp set... but after hearing them, i don't think so :P the low end sounds awesome, as it should. but anything above about 400-500 hz just ain't right. tried adjusting amp gains, EQ'ing, crossover points, etc and it still don't sound right at all. so i am going to put the 4's in as well. what i was planning on doing was leaving the 6 1/2's alone, but moving the lowpass crossover point down to about 350-400hz range. they are running off the rear channels of the art amp. then i have a set of pro 4.5 crossovers, so running that basically as a 2 way set with the 4's and tweets off the front channels of the art amp, through the passive xover, and just highpassing the crap out of it at around 400hz or so. slopes to be determined. if i had my clarion 9255, i'd do the 4way setup all active, but the alpoine 9855 only allows front high, front mid, and sub. with the tweeter mode set up in pro mode, i can move the tweeter crossover point to whatever i want it at, or even full range if i really want... so that gives me some flexibility there. basically what i'm looking for is any info or suggestions as to what crossover points to use, and what slope if anyone has any experience with these. i know those 4's will go wicked low if you ask 'em to, but if i don't need it, why push it also, if anyone has any better ideas as how to execute this, i'd be happy to entertain any ideas. i'd just like to see how great i can make my little $300 stereo setup sound, and compared to my last car (the jetta, Z6's, 3 amps, and other fun stuff) i think with some tweaking and tuning, i can get it pretty **** close. i got some good equipment to work with, just lookin for any suggestions from anyone else that's done something similar before.