box help

[audioque Sam]

hey guys.

i'm wanting to redo my current enclosure in the near future. Current equipment right now is:

vehicle: 05 jeep grand cherokee

3-d3100s

310a singer alt

3=belva 5000.1

3-soundqubed hdc 3.0 15" d2

the goal is to improve from 151.4db in the kick. can post dimensions tomorrow to see what works, but thinking about going with 2 woofers 2 amps maybe in a different type of enclosure. pictures of my current setup are right here :

http://www.stevemeadedesigns.com/board/topic/186627-chasing-db-150-kick-singerxs-power3-156kw/

any recommendations/tips with the current setup or advise on a different setup for a loud daily spl would be appreciated!