Measuring with Audyssey is okay, but a separate measurement without it would give you a “before and after” comparison to show what exactly it did. Don’t think I’d use dynamic EQ for measurements.
A subwoofer graph would be more useful if you run it up to about 200 Hz instead of stopping at 80 Hz.
How low a sub plays is dependent on the sub’s capabilities and placement in the room. I’ve seen 18” subs that should have been putting out well below 20 Hz that were “done” at 40 Hz, simply because of poor placement in the room.
It’s actually not a bad looking full-range graph. A bit more in the 100-250 Hz range would probably sound better.
Regards,
Wayne A. Pflughaupt