Im looking at a Audiobahn AWC12T sub and was wondering how do i work out what size enclosure to make for it. Could i mount it so the back of the sub shows when looking into the boot? I dont want to buy a ready made box as im in the process of building the boot up with 18mm mdf to include my 2 amps and a farad which is turning out harder to do than i thought as i want to keep the spare wheel.