Ported enclosure for 2 Obsidian 15's
 

I was wondering if anyone on here had any extra time on their hands to design me an enclosure for the trunk of my 98 Lexus GS300. I plan on putting 2 Obsidian Audio 15's in the middle of my trunk. Enclosure max dimensions would be 40 width, 20 depth, and 18 height. Looking for tuning frequency of 30 Hz. If anyone can help me on this that would be greatly appreciated, for some reason I do not trust online enclosure calculators, unless someone has a very reliable website they go too. Please help me out! Thanks.

TorresBTC.zip

use this one its the best i know of . altho i dont see you having enough room for a good size port and those subs unless you are giving them but loads of power