I completely understand as I've always had the same problem with all the setups I've had in the tour. I even had 7" Vifa's in the front doors at one time and it sounded pretty good but still not what I anticipated. The only thing I can think of is that it has to do with the design of the front doors & the enclosures that house the speakers. I recall a friend of mine way back in the day had MB Quart 6.5" components in the front doors of his 92 Maxima and they sounded fantastic. I eventually bought the same mids for my tour and ran them off the same exact amp he was using "PPI A300" and they sounded completely different. I think the best bet is to build kick panels if you really want to improve the sound.
