hey guys im thinkin about building a larger sub enclosure for my 15" Brahma. would like to go up to about 4.0 cubic feet. only problem is i had a ton of trouble getting my smaller 3.0 cubic foot box in. can i construct my box inside my trunk. my only problem is getting the box in my trunk. i have tons of room once its in. i hate it. don't want to put it in backseat also. any input please.