After much searching I have come to the conclusion that there aren't premade plans to build the sub I want. I guess that means I am going to have to design it myself. I am hoping to use the sub in my HT and I want it to fill up the space under the screen (in between two columns). I am hoping that this will help to frame in the screen. This is why the measurement seem so stange. I want it to be 7 feet horizontal by 15 inches wide by 18 inches tall (all of these measurements are approximents). I would prefer that it is bottom firing and ported. Here is the picture of what I want Can anybody tell me if this is even close to being feasible, and what problems I might run into. I'm open to any suggestions.