I'll soon be picking up a second Skar VVX which leaves me to a new box build (: It'll be going in the rear cargo area of a 99 Jeep Grand Cherokee I'd did it tuned somewhere around 33-34Hz and about 5 cubes after displacement Subs up and port back Will be using 3/4 mdf and the top will be a double baffle (2 3/4 pieces) and the subs will be countersunk will be building an amp rack off the back (so facing the front of the car) but that really isnt part of the box design Max dim are 40 wide 25 deep and 20 tall, (pref 15 tall though) Everything I will be running is 2 Skar VVX 15's D4 wired to 1 ohm Concept HPN-1500 (clamped clean at 1100) Big 3 upgrade (to be done when i build the new box) I do have a volt meter to check up on things as said earlier, will be in a 99 Jeep Grand Cherokee any help would be very much appreciated or suggestions on different specs (volume, tuning and such) also would like some ideas on terminals