Sony has the worst normal EQ. Its +10db Bass & +10db Treble for each section [Ex: Fronts] (Normal EQ not Room Correction). You can't tweak any specific frequencies, that's what the reviewers won't tell you

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For reference, my Sony STR-DN1080 came with a stereo mic. In terms of Sony's Room Correction, Its just called "Auto Calibration". Regardless of setup, you need a subwoofer even if you tell it you have no subwoofer, thanks Sony

. The Calibration process is probably the best I ever seen, takes a 1 minute and its accurate. When compared to my fathers Onkyo (Uses mono mic) takes about 5 minutes and its fine for accuracy. After it's done doing it's thing, you choose the "calibration type":
- Full Flat: Makes the measurement of frequency from each speaker flat.
- Engineer: Sets to “the Sony listening room standard” frequency characteristics.
- Front Reference: Adjusts the characteristics of all of the speakers to match the characteristics of the front speaker.
- Off
Just remember when having room correction enabled, your AVR puts the input source through a "Digital Workspace". Every AVR is different but its between 44.1khz to 96khz. That's why my Sony's ""Native DSD"" is disabled if I want room correction. Analog sources might (depending on your equipment) sound better with Room Correction off [Pure Direct Mode] (For example: Outside DAC).