Take this to a professional in the area. Go to the regional portion of this site or ask around in your area. I'm sorry but you do not know what you're talking about. Find a local meet or bass head if possible and ask if they can help for a little reimbursement I'm sure someone would be glad to check things out for you. Research the Low pass filter, high pass filter, subsonic, enclosures, wiring diagrams, phase of subs, AND what they do and how to set them. I can't even begin to tell you how much you will learn just researching things you aren't positive about.
You need to be sure you know things are 120% correct. Go ask a professional what's wrong with your system and question what he tells you don't just accept it (Please don't go to bestbuy or sound advice, look at reviews on google or from other bass heads in the area). Have him explain it, don't be afraid to pick his brain. That's all I can do to help you. Help us help you. Remember, research. This site is a million page encyclopedia for car audio. Use it first, then us.
Trey