It is likely that Audyssey removed the room gain that you might have been used to. Below is an example from my FR graphs plotted a few years ago when I was just playing around:
Here you can see that Audyssey flatten the bass between 15 and 300 Hz significantly as it was supposed to do because Audyssey's default target curve in that range is flat.
In doing so, it cut the bass between 20 and 37 Hz, and also between 70 and 120 Hz.
The combine effect would be noticeable weaker bass. Now if your in room response has more room gain than mine, then the perceived bass cut effects could be much more.
If you purchase the $20 Editor app, you can easily put a tilt to the target curve to get the bass back to the level you prefer.
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Another example:
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And if you spent enough time on the app, you can also get it very flat, and then add a tilt to increase the deep bass:
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