To all the experts & bros here,
Example #1: A subwoofer manufacturer stipulates that for a sealed enclosure, the typical enclosure volume is 1 cubic-ft in order for the woofer to deliver its optimum performance.
Question #1: Does the above means the sealed enclosure of 1 cubic-ft is the net useable internal air volume?
Question #2: Does the above means the sealed enclosure of 1 cubic-ft is the net useable internal air volume excluding the physical volume of the subwoofer after assembled in the sealed enclosure?
Example #2: The specs of a 12-in subwoofer is as follows