[lcaillo]

The advantages of the small setting are that you are not wasting power at frequencies that your mains cannot produce, that phasing problems between the sub and mains are easier to manage, and the crossover region is easier to equalize. If you have enough power on the mains so that you never stretch the amps with low freqs, the speakers can handle deep bass without distortion, and the sub is placed near the mains, it might be ok to avoid the filters in the Yamaha, but rarely are these conditions all met sufficiently that it is advantageous to set to large. Even very good speakers have increased distortion in the mid bass region when trying to produce deep bass that is present in HT program material.

Also, brucek, with all due respect, your comments on EQ of the mains assume a lot. Some speakers and installs can definitely benefit from equalization. I agree with your view in most cases, but to make such sweeping generalizations in this field almost always results in wrong conclusions for some systems. I certainly prefer not to have to screw with filters on anything but the subs, but one cannot always use the best speakers, place them in optimal locations, nor treat the room adequately to eliminate the need for some equalization.