Thanks for answering a bunch of my questions on the phone today, but with answers, come more questions.
Considering that the integra that I have is small, I would love to minimize the space that my box takes up in the hatch. In an effort to do this, i was thinking about building a rectangular box in my spare tire area. The allowable rectangular footprint on the bottom of my spare tire area is 25 inches front to back, and 18 inches left to right. Assuming I build two separate enclosures (1 per sub), this would leave me with interior dimensions of 11x16.5. Which would mean my interior height would be about 8.5 inches, for a little over .88 cubic feet of interior volume.
If i do this...
1) The subs will be facing upwards, is this a problem? I know you said that its a good idea in small cars to have the subs face the back of the car.
2) I might cover up the box with the carpeting that covers the cardboard floor. Would covering my box and subs with this negatively affect the acoustics? I know that I wouldnt cover my home speakers with carpet in the front, but I also realize that having a box in a trunk and having the bass go through the rear seats doesnt necessarily screw bass up either, so Im not sure what effect it will have.
3) I know you said that it shouldnt be a perfect cube so it doesnt produce any standing waves, does that mean that it can still be rectangular, or does it have to have some non right angles (be wedge like)?
4) Should I do anything to reinforce it to keep it from rattling? If it were just a normal box in my hatch it would be sitting on cardboard covered with the carpet, whereas my plan is to have it sitting on the metal shell instead. Should I put carpet down in the trunk to silence vibration caused by the box?
5) And on a side note, did the single sealed box that was built on the website for the 12 inch momo take into account the interior room that the woofer basket takes up? Because it appears that the interior volume is about .912 cubic feet if you multiply the interior dimensions of the box. Of course it is a wedge, and only one dimension is given for the depth, so that might account for the discrepancy. Clue me in?
As I stated to you on the phone, sound is the first priority, and if your experience is that doing something like this will negatively affect my sound, I will just make a box as normal, and just take it out when I need the room. But I must say that I am intruiged by the added security, and room that a spare tire box could provide. Lemme know your thoughts, and thank you for your time.