We have never built a variable tuned box of this caliber before. the box will be 38" high 39" wide and 22" deep (outside dimensions). the sides back top and bottom will be 2 layers thick and 3 layer face of 3/4". the inside will have PVC cut down for all corners and fully glassed inside.
What i need to figure out is how to be able to have at least 3 different tuning options, but easy enough to be able to drive to a comp then switch. example drive to comp tuned to 30hz and then retune to ~60 for spl purpose.
I will be running 2 18" upgraded DC LVL 4 18" off a Single DC 5k and later using the same wall to house 2 18" LVL 5 and 2 5ks.
Please any ideas would be help full! also I believe we will be doing the subs across the top and port at bottom.