I have a D140 recone (parameters totally unknown), and a slightly small but hopefully usable box to be mated. The box (inside) is 13.5 deep, 18.325 high and 25.625 wide, the four holes are each 2.375 each, but had/have 2" ID x 5" long plastic port inserts.
Looking for help redesigning - hopefully only modifying the ports - to tune this box to that speaker ... maybe in exchange a small gift certificate to your favorite beverage store?
Looking for help redesigning - hopefully only modifying the ports - to tune this box to that speaker ... maybe in exchange a small gift certificate to your favorite beverage store?