Front wall speaker distance


As a starting point when measuring speaker distance from the front wall should I measure from the back of the cabinet or the front/driver side?
I can't seem to find the answer on other threads,
Thanks!
128x128orelayer
Driver side since its distance is what determines the time delay between direct sound and the first reflections which in turn indicates things like frequency of the SBIR null (where the driver is 1/4 wavelength from the wall thus making its first reflection 180 degrees out of phase).