The point with EQ for feedback control, or tuning, of a live sound system is how you use the tools you choose. I should mention that Rane's Interpolating Constant Q design is not quite the same as Behringer's X32 True EQ, the latter of which is flat between bands when summed together, but we also have to use our ears if we aren't given the exact specs of the EQ's we use...cheers!!
