I just ordered a pair of 'FM8's to use with Magnepan 1.7i's -since I listen to more music than movies and the FM8's are so flexible! I was going to place them '1/4 distance front wall'-since from what I read that anything played over crossover setting of '120' would become directional- just like a regular speaker is. I read the 'initial setup sticky post'- and see that I would turn the crossover to maximum- which on the FM8's would be '200'; and then run my pre-amp's Audyssey setup. After set-up - if I left them set at say '120' would that mean they will play any signal that is '120 or lower'- in other words they would not get a signal until my speakers reached their crossover point that is set up on my pre-amp?

Also- once set up and placed- is just a matter of switching them to 'Low H/T Bass extension' and '12db Slope' on back of subs when they were being used for movies?

Thanks!