I am having an issue with the levels of my AV8801. Recently, I have noticed that in certain movie scenes, e.g. in Interstellar where they entering the wormhole, my subwoofer produces a nasty rattling sound that sounds very distorted and unpleasant. My subwoofer is the B&W ASW608. OK, OK, it's not the best subwoofer in the world, but I like it for music and, anyway, for the most part during a movie it produces a clean, musical bass. However, in those few moments during bass-heavy movies like interstellar (I am not even going to mention Arrival), it seems that it cannot handle those bursts of current (low-frequency bass?). I have tried to adjust a setting that I found under the Audyssey menu, which sets the LFE level, but after reducing the level to -5db it still produced that rattling sound. I actually bent down and observed what happens. The diaphragm vibrates normally up until that moment, and then during the distorted sound it really hyperextends, probably reaching its mechanical limits.
OK, my question is: is there a way to prevent it from trying to reproduce those very low frequencies, while keeping the rest of the bass levels (which I like) the same?