Define

Is this a Voight-Kampff test to detect if you are an audiophile?

Does that make you Rachel?

No, it's a straight forward question. I swear. :)

If the acoustical center of a driver is where the cone and voice coil come together (as Rodman99999 says above), then for the purposes of measuring the distance to the acoustical center of a two way, non-time aligned system where both drivers attach to a front baffle, is it preferable to use the woofer or the tweeter as the measurement point?

The difference isn't large, but there is a difference between the two drivers.

In a 2 way system where the drivers are not time aligned, is it, for the purposes of measuring distance to the acoustical center, more useful to use the woofer or the tweeter?

Is this a Voight-Kampff test to detect if you are an audiophile?

In a 2 way system where the drivers are not time aligned, is it, for the purposes of measuring distance to the acoustical center, more useful to use the woofer or the tweeter? I'm guessing that it would be the woofer, since lower frequencies are more directly coupled with room boundaries.

Actually- The "acoustic center" of a dynamic driver is the point at which the voice coil attaches to the cone, dome or diaphragm. When "time aligning" drivers in a system, these are the points of the drivers that are "aligned".