I have 3 rockford punch HE 12"s. they require 1.75 cubic ft each. I am powering them with a rockford punch 800a2. This is going to be installed in a 95 eclipse GS. I removed the spare tire and am going to remove the bar that held it in. Anyway, first off, I am amazed with everyone here's knowledge. You guys know your stuff. anyway I need to know if I have to spearate each enclosure for each sub to have 3 1.75 cubic ft enclosures or If i can just use one large 5.25 cubicft enclosre for all 3 subs. Also does anyone have any suggestions for this install such as the way to go about building the box (materials, placement, etc.) I am not new to the Car audio scene but when it comes to enclosures I dont really know my stuff. I hear about fiberglassing the wheel well but Am I supposed to make the whole thing out of fiberglass, and how do I do that? fiberglass is annoying to work with I know this is a lot in one post but thanks a million for reading. I am looking forward to you guys helping me get off to a running start on my install!