Sure but to remove the cable from the equation, clip the leads to both drivers and measure each. May or may not be a significant difference without the cable but you'll know you're looking at the drivers, only. Good luck!
More Crossfeed Filter progress:
I built Frans' (aka solderdude) CrossFeed Filter. I added 8-pin ICs which allows easily testing the effects of various Resistor values without having to desolder them each time...Thanks dbel84 for the suggestion. Works like a charm.
Annotated pictures in Post #1 of this thread, see Chapter 33
Next up, just now starting to build Jan Meier's "Corda Cross-1" crossfeed filter.