near field

Hi, I am trying to adjust a speaker with a DSP EQ to have a flat low frequency SPL indoors. I will not go into why at this point. Is it possible to make a near field mic setup and apply a "mic calibration file" with the inverted (simulated) diffraction response? This would of course work only...

As seen in the screenshot, i have done my nearfield and far field measurements. I have applied the window settings to the far field measurement to get the quasy anechoic response. Now when i try to merge my far field measurement with my near field measurement the expected result is a full range...