What Subs? Vehicle, max width, height and depth and the amp your gonna use? Plenty of people here to help if you give us the info! How about for a RE Audio SX 10inch amp i have powering it is a kicker zx1000.1 the car is a 07 Suzuki Reno I have a kicker 15inch cvx in a 3.0cubic ft box made for spl. so my max width 31inches, max height 16inches, max depth is 18inches, i know on re site for the 10'' the optimal size box is 1.25cubic ft tuned to 34hz im willing to pay if somebody can build it. Thanks, Lamar