I have those speakers but the 10s...what did you use to compute airspace?
a calculator... if you have 10w3's then the drivers take up 0.050ft^3 so two would be 0.10ft^3 the correct airspace per sub is 1.125^3 assuming you have a d-4 so make a box that has a volume of 2.23^3 ft minus 0.10^3 so 2.13^3 ft is the volume your looking for.
