https://youtu.be/flj5XmyrLyI
This is mosconi Cto explain how to use all pass filter.
i can not understand why at 15:00 he could find the exact frequency 3500hz to do 1st order apf. Could anyone explain for me pls?.
i only know how to see phase relate using RTA (skizer guide). Dont know how to measure phase.
my right midrange and right tweeter does not sum well at xover zone (2460hz), it does not complete cancellation but sum 0db gain. What does it indicate? What frequency should i attempt to try all pass filter? Thank you.