wow,
this is why i hate forums. Nothing but wrong information gets passed around.
Set your sub crossover to 80Hz , frequencies roll off, so even though your set at 80hz the frequency band will roll off each side, so you will still produce 90 hz and above but it won't be as predominant as if you actually had the knob set at a 100 hz or a 110hz. Setting it at 80 ensures your subwoofer will reproduce the frequency below 80 hz and some of the mid range above80hz. If you set your sub at 120hz then your going to reproduce way to much mid range and its going to sound terrible. Stop thinking your going to miss something by not getting this setting right.
Set your speakers to large and call it good, let them produce what they can produce. If you want to set your receiver crossover to anything then set it to 80hz and call it good.
question 2) thats corect
question 3) don't increase levels at all, set to it to zero
question 4) thats because these yo yo's told you to set it at 120hz, set it at 80hz like i told you and tell me how much better it is for movies.
question 5 ) if you set those rf 52s to small then your going to short yourself on the low range frequency, that speaker can reach as low as 36Hz, if you decide to set it to small then your telling that speaker "hey i want you to produce 60hz and above (not sure where small actually sets the crossover for that speaker but im sure its 60hz or above). so set it to large and call it good
question 6) never heard of bass out, skip that until you know exactly what it does. Never hurts to call Yamaha directly and ask them.
So in short , like this thread should have been. Set the sub to 80hz, set your crossover to 80hz or less (lowest i would set it would be 60hz), sit back, relax and enjoy the show