Ill have to look for the thread with the EQ i know the one ya mean.

I got the amps and speakers from Ebay and Hifisound connections.

I just did a search on Google for kicker 700.5 and 450.2 and got what i liked the best.

As for sub material and coating MB board with a resin or thick water proofing coating will do the job. i don't know to much about making sub boxes so you will have to enlist Razz or Newty or one of the other tech guys on that.

This is why im hopping Newty will have time this winter at some point to help me out on my sub project.

As for location yes under the drivers area at your feet. Its the most popular place and offers a good amount of room and lets the speaker breath.