When I set up my speakers (I have yet to run the Audyssey), I manually set the M80s and VP180 to a 40Hz threshold. However, this made voices difficult to hear on the VP180, but when I set the threshold to 80Hz the voices became satisfactorily clear. I had just hoped that the VP180 would sound great with a 40Hz threshold, so that is the limit of my disappointment.
I have to say that I don't fully understand how that could be since typical male voices will be above 80Hz, I would see that to be more of a problem for music with bass instruments (although I think the VP180 does a wonderful job in this department). Maybe someone with a bit more of technical knowledge will be able to explain. What matters is that you found a setting that sounds good to you.
