NetGuy,

I think you're on crack . If you set the channels to small, then you should be able to use a custom set crossover. If you set the channels to large it should mean they are 20Hz to 20kHz no matter what you set the crossover to and the different crossover points will have no effect. Also why would you want to have the low bass coming from both the sub and the mains? It will result in cancellations unless it is set up and tuned (proper phase, equalized, etc) very carefully. I always set all speakers to small, set the crossover to 80Hz and let the subs do their job. Any other settings have always led to a muddy front soundstage and total loss of clarity. If I am misunderstaning something, please let me know, but this seems like you want the 990 to do something it can't and you shouldn't.