YPAO (autocal) and the supplied mic are limited to >31.1Hz and there are only 4 bands of EQ available.
Funk Audio subs can extend a full Octave below that range
REW is your best bet to see what your room is Really
doing (free software download)
You will need a Calibrated USB mic to use REW, the miniDSP UMIK-1 is a popular choice at just $75
The UMIK-1 mic must be calibrated with download file available on miniDSP site
after you enter your serial number
You need to use the 90º Calibration file to use your UMIK-1 in the upright (aimed at the ceiling) position
(recommended for multi-channel and sub calibration)
How to use a UMIK-1 and REW to make your first Frequency Sweep of your room:
You can then make PEQ adjustments for 4 Bands in the Yamaha using manual setup mode down to 16Hz.
Funk's built-in AllDSP software opens up more options for manual corrections with deeper extension.
Nathan can provide an unlock code (by request) to open up access to the filters to adjust your own house curve
...but you still need REW to help determine where your room has any potential room modes (peaks/nulls).
If you want total control for up to 4 Sub outputs with 10 bands of EQ for each channel down to 10Hz
Nothing on the market compares to a miniDSP 2x4HD for ~$200
(has a pull down option to add a UMIK-1)
I used a miniDSP 2x4HD to unlock my Funk Audio 18.0's true potential and also use it for BEQ (BassEQ) to unlock 770+ Movie Titles here:
My Twin 18.0 Funk Audio subs with total peak output 9600 watts,
...and frequency extension down to single digits: