crossover design by frequency response results

hi,
recently i purchase 4 way JBL 4756 (2206,2402,2445,e155-sub)
now, i cross 8 CH with software and power the system with 8 CH amplifier.
i start to measure each speaker from 1 meter distance to find the best frequency to cross.

do i need to measure the speaker from the sweet spot (were i sit)?
or measure from 1 meter?

thanks