I have been having trouble trying to understand on how to make a box design, so I was just going to see if anyone here could help me. I know that when some one asks this question they tend to leave out important information when needing help so I'm going to give you all the info I can, and please tell me if I am missing anything. Trunk dimentions(MAX): 17" Tall, 35" Wide, and 20" Depth Subwoofer: Fi Sp4 15" Loaded D2 ohm sub wired to 1 ohm Amp: Audioque2200D Wire: All Sky High Car Audio Cable Alt: Stock 180 amp Batteries: Xs Power D4700 hood & future Xs D1200 trunk It'll go in the trunk of a 2012 Chevrolet Cruze. I've tried using Torres Box calc and google sketch up and so far I've had no luck. So any info, input, or any help in general would be greatly appreciated. Thank you guys!