And ttocs it all depends on the model sub. If the two 12" woofers you are building a box for don't require a lot of space and the box is sealed, you can easily fit it in our trunk. You should know that.... They built my box for my two 10" Type-Rs (no comments please...they are being replaced soon

) to be TINY. Each sub only need .75 cubic ft. for a sealed box. Same requirements for the 12" version, just a bigger hole to cut out.........