Speaker question

Now the crossover itself had two non-polar caps which I replaced with film caps as I wanted the speakers to be something that 30 yeas down the road I don't have to open up and recap.

Now would there be any use to using the DATS V3 connected to the whole speaker to see what it measures like?
 
At some point when I have the money I need to get four cabinets built to the following internal dimensions.

I'd probably use 3/4" thick wood.

H 45"
W 11"
D 7"

Which will be 2.005 cubic feet.

I may mount the drivers on the front and use grills over each one.