im going to use that design... what kind of sub you using??? whats the depth
Rockford fosgate 8" shallow mount. 2.66" mounting depth, its a small sub and a small box, but it sounds pretty good, definitely a step up from a powered sub stuck under the drivers seat. Probably isnt as loud as the "armrest" style boxes some guys build for access cabs which can fit 10's and have 3-4 times the airspace. I think theres some more pics in my build, if you end up doing it let me know if you have questions. I would be happy to help if i can.