Tempest box.

"a good 15 inch sub to play with"

"4 cubic feet with a 4 inch inner diameter port."




"elbow 90 degrees.... total of 12.5 inches to tune the box at 23Hz."




"Here is what it looked like after I did the math..."




"15 inch TEMPEST"




"carpet and terminal installed and sub dropped in for picture."




"another pic of it."




"here it is in the truck."




"One more for luck."