What does audyssey do where subwoofer rolls off

I'm pretty certain that audysey is going to default its processing power on NOT boosting holes in any part of the freq response, but rather on knocking down the peaks! If it did, clipping and distortion would likely be the side effects, overdriving amps, overworking drivers, and so on.
You still simply cannot rely on any level of fancy EQ system to be a FIX-ALL for undersized drivers, acoustic holes in speaker/ seating locations, flaws in speakers and basic setup inadequacies, etc. The audyssey is a helping tool, not a bandaid!..FTR. Anyway, I believe the roll off on the sub- if it played out in a large space as attenuated frequency response - would go virtually untoucyhed by audussey. On the other hand, say, in a smaller acoustic space, where boundary reinforcement would boost the overall bass reigion, necessitating a possible reduction in overall base bump, yes, then audussey would EQ the excess gain out, to smooth response.
Audussey alsoight adjust phase response or even rt60, but I'm not sure. Might send email to them n ask. Otherwise read up on the many aricles on a search.

I definitely researched this on the web first. I didn't find much. It makes sense that it would be more about removing peaks than things like boosting bass. It would be nice if there was a way to see what it was doing to the frequency curve.

While some EQ systems have been developed to tame peaks only, my understanding (again, not certain, but vaguely recalled from days researching the system) is that Audyssey actually does boost nulls, as well. It may well be that any boost is limited for frequency and/or amplitude to avoid the "runaway amp draw" being discussed here, but I do seem to recall both boost and cut. BTW, certain other EQ systems (Velodyne for one) definitely include boost, so Audyssey would not be unique in this regard.

Again, I can't claim certainty on this point, but I did a boatload of research on Audyssey 4 or 5 years ago and I remember it this way. Then again, my memory ain't what it used to be!

Thanks Martylk for confirming that it isn't obvious :)

I am a Audyssey Installer. We measure totally different compared to the Audyssey way. The endresults are superior compared to the Audyssey Way. Because with the Audyssey methode you loose too much dynamics and drive. We also measure differently then 75 db. I will not give this information, because I never had such a big advantage over other audio shops.

With Audyssey pro you get a stunning level of integration with your subwoofer. Sofar I never auditioend this level at any show or client over 16 years of time.

Audio is all about comparing and testing. When you try things differently based on your thoughts it is often easy to create a higher endresult.

I have had a few surround specialists hearing my set. One of them said: you have gold in your hands. This is the way how I measure a subwoofer. I call it stealth integration. Lst year at a show many people came to me and said: we cannot hear your subwoofer. I played Kraftwerk at very high volums. It goes very deep ( my sub goes to 16hz) but the most special thing is that I use it till 140hz. This makes the low freq. become physical apparent. Even when the double bass or drumm is on the left side of the recording, here is also the energy and dynamics coming from. Subwoofer stands 2,5 metres from this place.

I do not have any problem with a higher roll of. Because you can influence this part before you do the measurment.

When you look further in sound, you will find out that you can achieve a much higher endresult!