Regarding question 3, I guess I'm curious what it does then. For example, if you have the crossover set to 40 Hz, does it move anything on the LFE channel above 40 Hz to mains? Or is it that the high-pass crossover is only applied to all speakers except the sub? So for example if all are set to small and at 40 Hz, if there is a 75 Hz signal on the LFE channel of a DVD, it still goes out to the sub?