Alaska_KO

LOL @ " I served you once..." How many copies of ~Bring It On~ do you own ?

I appreciate the advice. I have made a mold of the floor in the rear of cab, looking to gain airspace. I have also found other subs that don't require as much space in a vented enclosure. Maybe I'll just go back to a sealed design. ... is the box you made for an extended cab or single cab ?

55 inches wide, 17 inches high, 4 inch top depth and 10 inch bottom depth. Those are the max outside measurements with the seats in a normal position. If I have to lose some room or make adjustments I can, maybe only use 3 10's . The reason for the 17 inch height is the rear part of the floorpan not flat, so 17 inches is from the highest point of the floor. The box could be taller, the top depth would just need to be less. Thanks for any help

Yes, that is correct.

I plan to put 4 10 inch Fi Audio SSD's in a 2001 standard cab GMC Sierra. The amp I have chosen is a HiFonics BXI 2608D, I chose that one because it is STRAP-able. I need assistance with the box design as I would like to have a vented enclosure. I have seen boxes in which all the subs use the same airspace with only one common port. Is that possible with a behind the seat style enclosure ?