Could someone please explain a few things to me in simple caveman terms...? My receiver is a Pioneer 850s. 1. What exactly does the Low Cut Filter do? Does it cut the super low frequencies to the sub? If so, at what frequency?? 2. What exactly does the LFE Attenuator do? It has 0db, 10db, or off. I seem to have read conflicting descriptions of this... 3. Which frequencies go where when subwoofer "PLUS" is selected? Thanks all!!