Midrange compensation. You can turn it off by speaker curve in the app. I did. It appears to be a preset 4dB, low Q dip centered at 2k. Not really sure what its purpose is, but I want it flat.\n\nEdit: Article from the man himself is here: https:\/\/audyssey.zendesk.com\/hc\/en-us\/articles\/212347863-Midrange-Compensation\n\nI may have to try it with and without this dip.\n\nI think Dr. Kyriakakis has finally accepted the possibility that a lot of people can benefit from removing that intentional dip, depending on their room acoustic environment and their personal preference.