since none of your speakers play full range i think you would be better off with all of your speakers set to small and send the deeper bass to the sub.i am not familar with your receiver,but if you are able to set your crosover.80-90 seems to work fine for my vp150,as for the other speakers,wich i dont own,the specs seem that the 80 mark should be good,or your reciever may have predetermined crosover points when set to small wich i belive are usually around 100hz.so i would say set them all to small,and let the sub do the bull work,it will take away some of the load from your mains center and surrounds....good luck...ron
