Well I'm trying to work with what I have now, all my speakers are new. As far as building materials are used, MDF seems to be the most cost-effective choice (which is acceptable) and a binding element is a no brainer. Research has been done, I've learned a fair amount, but I can NOT find the datasheet for my speakers with ALL the needed info for the box designing programs. My dad and I installed everything, straight wired it all from the head unit to the mids and straight wired from the amp to the battery and subs and used the rc cables that came with the amp kit from the head unit. The head unit is from Best Buy, it's the Sony Xplod CDX-GT550UI. I don't think I'm forgetting anything, but I'm multi-tasking at the moment, so if I did miss any other information, let me know.