Hello there. I have been out of this site for a while but am back. I just bought zr650 comps for the front and now looking to do some rear fill (I know flame me)..The zr800 comes only as a mid bass driver and was wondering if I can make it a full range by adding on the same crossovers and tweeters as the zr650 (4 total x-overs and 4 total tweeters when all said and done). I really wanted to swap the 6x9s with the zr800. tell me what you guys think there is no budget.